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  1. #1
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    30 tooth 104 bcd

    Who would buy a 30 tooth 104 bcd middle ring, with ramps, if it were available?

  2. #2
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    I probably would, although my brand new (2 rides) EMD seems to do ok with a 20t granny and a 32t/bashguard setup.

    ___________________

    Changed my mind. After more than half a dozen additional rides, including a couple 3+ hour rides in pretty hilly terrain, I think the 32T ring is fine. Knowing what I know now not sure if I would have bothered with the 20T granny, but it gives me confidence just by being there. I'm finding the bigger wheels are so much more efficient that even an old slowpoke like me rides one gear higher almost everywhere.
    Last edited by TFitz; 02-17-2009 at 07:28 PM.

  3. #3
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    I'm running a 20t on my 2008 XTRs. Love it. Love the low gearing. Not sure I'd want the 30t or not. Never had any trouble w/ it so far.
    However-I'd take a 30t w/o ramps just to use on the SS.
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  4. #4
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    Not sure that it's physically possible for that BCD...

  5. #5
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    extralite is already making one.
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  6. #6
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    I've always lost track of various BCDs. I know there are a few tooth options that are possible but look like they won't work (the 20t innner on my XTRs).They do it in a way that the bolts are made clean enough that the chain can pass over them and are spaced so the bolts are in between the teeth ( in the valleys so to speak).

    Extralite does list a 30t 104 on their site. perhaps the threads OP was asking since he/she has the ability to make a few of their own?
    http://www.extralite.com/index_euro.htm

    A second option for oddball chainrings is actiontec but they don't list a 30t 104.
    http://www.actiontec.us/prices.htm

    I'd still take a 30t for the SS. Hate the way the Moots looks w/ a huge rear cog. If I rode in a less hilly place I could step down 2-3 teeth.
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  7. #7
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    Quote Originally Posted by 20.100 FR
    extralite is already making one.
    Yes, but it is for a 2 x 9 set up only (it's a great looking ring - that's for sure) with no ramps.

    The OP wanted to know who would ride a 30T with ramps for the middle ring on a triple if available. Hey, OP - can it even be done? There isn't room. But, that's why we have 58/94mm BCD sets with the 20/30/40 rings!!!! Kudos to Middleburn for jumping in and taking over to replace the Salsa Pro rings that used to be available in 20/30/40.

    BB

  8. #8
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    I would use one, and I would be willing to grind down my mounting tabs to try so they would clear the chain. And no incorporated chainring bolts. I don't want to snap anything off. Also you could design it around being spaced in a little to avoid the chain contacting the mount tabs. You can get creaking running a spacer between the mount tabs and the ring though. Better yet incorporate the spacer into the ring so that the mounting face of the chainring is a nice flush mount instead of an aluminum spacer. This would give the chain a relief area to clear the mounting tab without being modified.

    The ring would only really be good for SS or 1x or 2x due to the spacer, but I would be fine with that seeing as I want one for a 1x9. On a 2x9 setup you would just have to space the little ring in a mm or two. It would throw off the chainline a bit, but with RF external bb style axle cranks, you could just alter your chainline with those handy little spacers. Or on other brands you could include some nice axle spacers so you could ditch the BB spacers (the ones for adjusting to a 68 or 73mm bb shell) and play with axle spacers to get the required chainline. But then you would have to ditch the internal plastic "seal" that fits between the external bearing cups inside the bb shell.

    I hope that all makes sense. It does in my head. It might be a lot of work for having a 30t chainring. 94bcd cranks are a better setup. They will also ensure equal crank spacing between the chainstays. With the axle spacer idea the cranks wouldn't be centered so crank/chainstay clearance could be a problem. A nice LX, XT quality cassette with a 36t cog is an even better solution. So is getting a left shifter, a little chainring and a front derailleur. But I'm sure you'd sell some if that's your plan. My ideas might sound a little crazy, but I've thought about it more than a couple of times. 94mm BCD cranks are hard to come by. I know EBAY has a fair amount, but they are in "high" demand.

  9. #9
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    I would.

    I think a 30th 104bcd for a std shimano (XT) crank would be a hot setup for me. I can do ok with the current 32th ring but would love to get some gearing back.

    I'd also be pleased with a 31th front ring also. I'm not so sure that a 30th is possible but I know for a fact that a 31th is...Boone use to do it and I know someone with one.

    What you got in mind?
    CJB

  10. #10
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    he's got the idea down....

    was at his shop the other night

    been testing a prototype 31 and it's working fabulously
    he knows what he's doing
    there's my official endorsement

    will be testing the 30 soon
    I have no financial ties to him, just a good guy trying to make a unique product

    Charles

  11. #11
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    Gonna make some more cool bash rings to go with? Choices of CR materials?

  12. #12
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    Quote Originally Posted by BruceBrown
    Yes, but it is for a 2 x 9 set up only (it's a great looking ring - that's for sure) with no ramps.

    Hey, OP - can it even be done? There isn't room. But, that's why we have 58/94mm BCD sets with the 20/30/40 rings!!!! Kudos to Middleburn for jumping in and taking over to replace the Salsa Pro rings that used to be available in 20/30/40.

    BB

    Yes it can and has been done, but not tested yet. I will post the results when it has been thoroughly abused.

    Middleburn makes some really good stuff, almost went with them, But I Choose the Surlys and put my own 74mm spider on so I could run a 20t/28t/bashguard. They also told me that couldn't be done.The 28t is ramped and shifts great. Here is a picture of my 74 mm spider and 20/28/BG.
    Attached Images Attached Images

  13. #13
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    Quote Originally Posted by hammerheadbikes
    he's got the idea down....

    was at his shop the other night

    been testing a prototype 31 and it's working fabulously
    he knows what he's doing
    there's my official endorsement

    will be testing the 30 soon
    I have no financial ties to him, just a good guy trying to make a unique product

    Charles
    The 30t is ready for your abuse.

  14. #14
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    Quote Originally Posted by Duzitall
    Gonna make some more cool bash rings to go with? Choices of CR materials?

    when I can get it, 7050 aluminum if not it will be 7075.

    yep cool bash gaurds will be available.

  15. #15
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    Can I thrash one? I'm running a 1x9. It would get regular daily abusings consisting of snow, sand, salt, and major grime. Hope to see these around soon. I'll take two when they are available.

  16. #16
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    Quote Originally Posted by BRUZED
    The 30t is ready for your abuse.
    sweet!
    I was going to try to get by this evening but got slammed at work
    tomorrow afternoon fo sho

  17. #17
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    UPDATE:
    works perfect
    I am running the 30t on my XT cranks
    too cool!

  18. #18
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    I will take 2 if you are selling them.

    Thanks,

    Brian
    Owner of JRA Cycles, Medford Ma.

  19. #19
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    Quote Originally Posted by hammerheadbikes
    UPDATE:
    works perfect
    I am running the 30t on my XT cranks
    too cool!
    That great news, I will have two more ready for testing today.

  20. #20
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    I will take two as well when you want to sell them.
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  21. #21
    Te mortuo heres tibi sim?
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    I'd take a couple as well.
    Florence Nightingale's Stormtrooper

  22. #22
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    Two for the CA sun!
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  23. #23
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    I would take 2 as well.... very cool.

    Where do I get 20 tooth little rings for a 4-bolt setup?
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  24. #24
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    Quote Originally Posted by Lugboot
    I would take 2 as well.... very cool.

    Where do I get 20 tooth little rings for a 4-bolt setup?
    Same deal as the 30T ring, with the 64mm BCD. Won't work unless somebody does something funky/special. 22T for that is the smallest.

    Someone correct me if I'm wrong, though.

    I just got two 28T 104mm BCD steel Truvativ unramped rings to try out on a 1x9 setup - waiting on a thinner bash ring to mount in the middle ring spot to help with dropping the chain outside. Paired with the JumpStop inside it ought to work fine, but may be a bit lower geared than I really want. Eh, I'm a spinner not a masher anyhow.

    Actually should work decently where and how I ride.
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  25. #25
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    I had a feeling that would be the answer. Thanks!
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  26. #26
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    Please send info when available.

  27. #27
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    Quote Originally Posted by BRUZED
    That great news, I will have two more ready for testing today.
    Pictures!
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  28. #28
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    2 here as well!


  29. #29
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    Quote Originally Posted by Lugboot
    I had a feeling that would be the answer. Thanks!
    Try Action Tec - that is the 4 bolt 20T chainring that I a running. You will ned to probably grind a little off of the inside of the post where the 20T bolts thread into the cranks as I had my chain bind up on them without a little "cleaning"

    Now on the 30T - I need 2-3 of those, let us know when you are ready to sell.

  30. #30
    not so super...
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    I'd be interested too.

  31. #31
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    Kick ass!

    Quote Originally Posted by BRUZED
    That great news, I will have two more ready for testing today.

    Bruzed- thanks for the demo ring! I got it mounted up today and will be giving it a go tomorrow. Pretty freak'n slick the way you pulled off the 30 tooth.

    Oh and by the way we are putting the 31t on "the bulls" bike without her knowing it.....

    Later,
    CJB

  32. #32
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    I'd like a 30T too.
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  33. #33
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    put me down for a 30 tooth.
    I love my bike.

  34. #34
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    I currently have a 31 tooth Boone on my XT's, but you can add me to the list of those that want a 30 tooth.
    Riding Fat and still just as fast as I never was.

  35. #35
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    3 30 t please.
    One for the SS, one for the gears, one in the wings.
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  36. #36
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    some more feedback
    more mileage in, shifts flawlessly
    I run a stock xt 22 granny, 30t (whatever he decides to call his company) and a 38t blackspire mono velocee (no ramps/pins)

    up/down, whatever...
    very crisp shifting from granny to middle

    thanks man!

  37. #37
    jrm
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    Ill take 3 or 4 too..

    Quote Originally Posted by BRUZED
    Who would buy a 30 tooth 104 bcd middle ring, with ramps, if it were available?
    still love to see a pic. hey id love to demo one here in nor cal.

  38. #38
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    Quote Originally Posted by jrm
    still love to see a pic. hey id love to demo one here in nor cal.

    Sorry, but I don't want to post pictures yet. I will post them as soon as I have some completed and ready for delivery.

    I' am keeping the demos close to home so I can keep an eye on them. I want to see how they are holding up, and get a face to face report.

  39. #39
    jrm
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    Ok, can i call dibs

    Quote Originally Posted by BRUZED
    Sorry, but I don't want to post pictures yet. I will post them as soon as I have some completed and ready for delivery.

    I' am keeping the demos close to home so I can keep an eye on them. I want to see how they are holding up, and get a face to face report.
    On a couple once you have um figured out? thanks..

  40. #40
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    I'm interested. Would like to see pics when possible.
    So, are you going to have both SS and ramped versions?
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  41. #41
    jrm
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    Bump

    Quote Originally Posted by BRUZED
    Who would buy a 30 tooth 104 bcd middle ring, with ramps, if it were available?
    Any more feedback on the ring? peace

  42. #42
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    I'd take one as well.

    Extralite seems to have the market cornered, and I'd like to have more choices regarding a potential 2x9, or slighly lower 3x9, setup.

    Thanks!

  43. #43
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    still ticking

    more mileage, still working perfect

  44. #44
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    Love the 30 T gearing it made my 29r a hot rod.I bit the bullet & got the middle burn crank went with a 20=30=40 set up . What a diff with that 30T makes .I think all 29r should have that gearing out of the box > stock
    that's just my 2 pennys

  45. #45
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    Quote Originally Posted by hammerheadbikes
    still ticking

    more mileage, still working perfect

    Yup me too. I've got about 25hrs of riding on it over the passed 2 weeks. It works great! At first though I thought it might actually be *too* low of a gear ratio. Then we went and road all the steep stuff with the pitchy climbs and I was in love with the ratio. I'm going to keep hammering it and see what happens.

    Nice job Bruzed!
    CJB

  46. #46
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    I've heard of this new invention called 'digital camera'.....



    How about some pics, eh?

    ZT
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  47. #47
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    Quote Originally Posted by Zen_Turtle
    I've heard of this new invention called 'digital camera'.....



    How about some pics, eh?

    ZT
    Sorry, but I don't want to post pictures yet. I will post them as soon as I have some completed and ready for delivery. I don't want to make any promises I can't keep as far as when they will be ready but it should be less than a 4 weeks. I will post pictures then.

    I do have one of those new invention called a "digital camera" and a 11 year old son that can show me how to use it.

  48. #48
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    Bruzed-

    What kind of "MSRP" are you going to sell these at?

    And will they work well as the small ring of a 2x9 setup?

  49. #49
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    I can't answer the cost thing and they will manufacturer direct I do believe..

    no reason they wouldn't work in a 2x9

  50. #50
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    I'd be very interested in a 30.
    c

  51. #51
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    well now...this sounds nice. I most likely will take one bruzed!


    Oh can you throw in some metal shavings for me to throw on the fire please

  52. #52
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    I'd pick up a 30T or 31T
    hxmiller

  53. #53
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    I want one!

  54. #54
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    I too want one, but I wonder if they will work with the chunky spider on my FSR carbon crankarm.

  55. #55
    jrm
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    If you look at the pic

    above there looks to be a spacer between the spider and the 28T ring.

  56. #56
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    Quote Originally Posted by Johnny Chicken Bones
    I'm running a 20t on my 2008 XTRs. Love it. Love the low gearing.
    a 20t on a XTR crank 2008?
    which type? brand?

  57. #57
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    Did you file the crank arms?

  58. #58
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    If Shimano did a 30T steel/carbon, I'd definitely be interested.

  59. #59
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    Shimano is coming out with a 12 -36 cassette which is targeted toward the 29er market

  60. #60
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    Me! Me! I want one!
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  61. #61
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    Quote Originally Posted by singletrackin
    Shimano is coming out with a 12 -36 cassette which is targeted toward the 29er market
    Why does this strike me as a silly way to get lower gears? Add material to make a bigger ring out back instead of making smaller rings up front?

    Not attacking the poster, just a thought tumbling around in my head.
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  62. #62
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    Quote Originally Posted by Lugboot
    Why does this strike me as a silly way to get lower gears? Add material to make a bigger ring out back instead of making smaller rings up front?

    Not attacking the poster, just a thought tumbling around in my head.
    Because it is silly.
    I am CHEAP

  63. #63
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    Quote Originally Posted by Lugboot
    Why does this strike me as a silly way to get lower gears? Add material to make a bigger ring out back instead of making smaller rings up front?
    I'm sure a lot of things make you giggle, but it's really not silly. Chain rings are already at the limit of what is physically possible (without something like the "Mountain Tamer" adaptor). The only way to expand the possibilities is larger cogs in the back. You may not have a use for it, but some do.
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  64. #64
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    Absolutely. Bikes make me giggle all the time. I know someone will buy it and good for them. I like the idea of the 20/30 combo up front. Options is good, yo. But as it is, I'm doing fine with a stock XT crank and an 8-speed cassette. It was probably easier and cheaper for Shimano to do this than figure out how to put smaller rings on their cranks.
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  65. #65
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    40 ready to be hard anodized.
    Attached Images Attached Images

  66. #66
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    Very

    Quote Originally Posted by BRUZED
    40 ready to be hard anodized.
    Cool. Do you have a date when they might be available.

  67. #67
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    Quote Originally Posted by BRUZED
    40 ready to be hard anodized.
    Them are some purdy teeth you gots there
    Quote Originally Posted by turnerbikes View Post
    Of course the easiest way to fix this is to go for a hike.
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  68. #68
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    Quote Originally Posted by duke of kent
    Bruzed-

    What kind of "MSRP" are you going to sell these at?
    Anything?

    Given the fact that I'm willing to give you money in exchange for your work, I think this is a legitimate question, and worthy of your time.

    You know, the usual buyer/seller relationship sort of thing...

  69. #69
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    I'd buy one in a second!

  70. #70
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    I'm gonna need a 30T 104 as well. Singlespeed if possible. I'm going to need to watch these.
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  71. #71
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    I am wanting one, but am kind of on the fence because they are ramped, but not pinned. After the early adopters get them and there is feedback on shifting quality I will make a decision.

    I am rooting for good shifting since I would like to convert to 20-30-40 if this works well. And generally, the smaller the ring the better the shifting so by the time we get down to 30, I am thinking it will shift great without pins.

  72. #72
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    Quote Originally Posted by yourdaguy
    I am wanting one, but am kind of on the fence because they are ramped, but not pinned. After the early adopters get them and there is feedback on shifting quality I will make a decision.

    I am rooting for good shifting since I would like to convert to 20-30-40 if this works well. And generally, the smaller the ring the better the shifting so by the time we get down to 30, I am thinking it will shift great without pins.

    I've been riding one of the prototypes for over a month now. I'll give you some feedback.

    Yes, they are ramped but not pinned. (He made me a 31 tooth prior to the 30t that had some really slick "pin" concept but I don't think they could be duplicated in the 30t ring) I noticed very little (if any) degradation in shifting. I think its mainly because the jump up from 22t to 30t is noticeably shorter. I do notice that the shift from 30t to 44t is less crisp and this has nothing to do with ramps or pins...once again I believe its the 14 tooth jump in ring-size.

    Overall I very happy with the 30t ring. I've been riding less over the passed 6 weeks and thus my fitness has waned and the lower middle ring gearing has been very nice. For most of the (fun) riding we've been doing around here I see very little reason to get out of my middle ring now (and we do ride some pretty steep but short punchy climbs).

    I think Bruzed has been working very hard in his little machine shop lately......

    CJB

  73. #73
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    I PM'd you BRUZED.

    I'll buy one (or two depending on what kind of pricing we're talking, hehe)

    You have just cornered a niche market...brilliant!

  74. #74
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    What I'd really like is a 30 x 102 bcd. Now there is a real niche market for you.
    "... displays the social skills of a barrel cactus." - TNC

  75. #75
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    just an update
    mine is still working perfect
    I use a 22t XT and a 38t blackspire mono veloce (non ramped or pinned)
    across all gears it works fine..

    I also run a 36t Action Tec ti rear cog in addition to an XTR 12-34 (with one of the small cogs removed)

    the 36t took a modification to work right

  76. #76
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    Quote Originally Posted by hammerheadbikes
    just an update
    mine is still working perfect
    I use a 22t XT and a 38t blackspire mono veloce (non ramped or pinned)
    across all gears it works fine..

    I also run a 36t Action Tec ti rear cog in addition to an XTR 12-34 (with one of the small cogs removed)

    the 36t took a modification to work right
    Q: is the AT ti cog a decently wide base to not chew up alu freehub bodies?
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  77. #77
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    Quote Originally Posted by hammerheadbikes
    the 36t took a modification to work right
    What sort of mod did you need to do?
    "... displays the social skills of a barrel cactus." - TNC

  78. #78
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    Q: is the AT ti cog a decently wide base to not chew up alu freehub bodies?

    I run it on I9s, seems fine


    Originally Posted by hammerheadbikes
    the 36t took a modification to work right

    What sort of mod did you need to do?

    the chain would rub the 34t
    I put a small bolt through each of the arms to serve as a standoff or spacer against the 34 to keep it from deflecting
    it was my primary concen when I first thought about getting one, i.e., how could a narrow piece of tie keep from flexing, was told it was a non issue...

    I know Mikesee runs one but with a 32t and I guess the chain clears the teeth due to the smaller circumference of the 32 vs the 34 I run...

    I love it though, it shifts fine and absolutely holds up under my load climbing very steep stuff, 200lbs + gear

  79. #79
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    I would love to purchase two as well when they are available!

  80. #80
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    Quote Originally Posted by BruceBrown
    Yes, but it is for a 2 x 9 set up only (it's a great looking ring - that's for sure) with no ramps.

    The OP wanted to know who would ride a 30T with ramps for the middle ring on a triple if available. Hey, OP - can it even be done? There isn't room. But, that's why we have 58/94mm BCD sets with the 20/30/40 rings!!!! Kudos to Middleburn for jumping in and taking over to replace the Salsa Pro rings that used to be available in 20/30/40.

    BB

    I know several of my friends, who used the extralite ring as a middle ring.

    They usually ride 2*9 (on uber light 26" bikes), but choose the 3 ring way for a marathon race with a lot of climbing
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  81. #81
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    Count me down for at least 3! I'll be paying attention to this thread to see when they'll be available.
    Just a regular guy.

  82. #82
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    info and photos of 30t 104 bcd

    I have forty of the 30 tooth 104 bcd middle rings completed and almost ready to ship, I just need to finalize the shipping a payment process.

    Here are some answers to some of the question I have been asked:

    The rings are CNC machined out of 7075 T6 Aluminum then HARD Anodized black.

    I most cases there will be some minor modifications required on your crank spider. This modification requires filing a bevel on the spider arms near the bolt holes (see photos). This mod will not effect the ability to use conventional chain rings on your cranks.

    Conventional chain ring bolts are not used on these rings. Supplied with the ring are 4 bolts and bushing. The bushing are there to locate the big ring (or Bash Guard) to the spider (see photo).

    These rings can be used for Single speed if you run a rock ring. In the future I plan produce a ring with, Hue Jazz teeth technology, so you can run a 1x9 with no need for any form of front chain guide.

    The price is $89.00 plus shipping
    Texas residents will pay 6.25% sales tax
    Attached Images Attached Images

  83. #83
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    more photos

    More Photos
    Attached Images Attached Images

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    I guess I should have expected that dissapointment. $89?

    I'm sure alot of the people around here will see it as a bargain, and props to you, BRUZED for finding and filling a niche...but there are those of us who don't have a disposable income and have families to feed.

    I guess I'll just have to stick with my $30 RaceRing and let my quads do the work instead of my wallet, hahaha.

    You've done a nice job though. One thing I don't understand:

    -are your mounting bolts long enough to go through a thick e.13 bash? This is what I run with a Blackspire Blackguard as an inner guide ring instead of a jumpstop. Your bolts look too short, sir.


    For now, I guess you can take me off the list. Call me when you can sell one for $50 or less, haha.

  85. #85
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    I'm in the same boat as chelboed, I just can't justify $90 for one less tooth on my chain ring. I guess I'll just have to take a file to one of the teeth on my 31 tooth Boone.
    Riding Fat and still just as fast as I never was.

  86. #86
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    Quote Originally Posted by chelboed
    I guess I should have expected that dissapointment. $89?

    I'm sure alot of the people around here will see it as a bargain, and props to you, BRUZED for finding and filling a niche...but there are those of us who don't have a disposable income and have families to feed.

    I guess I'll just have to stick with my $30 RaceRing and let my quads do the work instead of my wallet, hahaha.

    You've done a nice job though. One thing I don't understand:

    -are your mounting bolts long enough to go through a thick e.13 bash? This is what I run with a Blackspire Blackguard as an inner guide ring instead of a jumpstop. Your bolts look too short, sir.


    For now, I guess you can take me off the list. Call me when you can sell one for $50 or less, haha.

    I'm in the same boat as chelboed, I just can't justify $90 for one less tooth on my chain ring. I guess I'll just have to take a file to one of the teeth on my 31 tooth Boone.
    I do understand, that is a lot of money for a middle ring, and I now all about feeding family's. It is cheaper than new set of cranks, rings and bottom bracket, for some one that really wants a 30t middle ring.

    I am not making a lot off these things, if you factor in the material, design time, program time and tools. Plus there are five pieces of CNC machined aluminum (1 ring and 4 bushing) as opposed to a conventional middle ring. I am probably making more than a convenient store cashier and less than selling appliances at Home Depot.

    as for the E-13 BG/Blackspire Blackguard issue, you are correct it would not work with your set up unless, I made you longer bushing and bolts, which I would do for little or no cost.
    Last edited by BRUZED; 03-05-2009 at 02:33 PM.

  87. #87
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    Quote Originally Posted by BRUZED
    I am not making a lot off these things, if you factor in the material, design time, program time and tools. Plus there a five pieces of CNC machined aluminum (1 ring and 4 bushing) as opposed to a conventional middle ring. I am probably making more than a convenient store cashier and less than selling appliances at Home Depot.
    Believe me, I understand completely. I have a CNC running as I am writing this, and I wouldn't want to try to make those rings. I'm glad you are willing to do this, and I hope it becomes cost effective. I would defiantly like to try a 30 tooth, but it will just have to wait. I hope there are some others in the future.
    Riding Fat and still just as fast as I never was.

  88. #88
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    We had a chat about pricing, he's definitely NOT getting rich off these
    I was shocked at how much he has into these in hard costs, not factoring in his time..
    he's practically paying you to take them!

    you should consider what he's doing as a service, getting you gearing that no one else can without changing cranks

    how much do you have invested in your bike?
    90-100 bucks is nothing and you will forget about it the first ride out...

  89. #89
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    Bruzed, Interesting solution, way to think outside the box to make a 30t work.
    I'm curious about the bolt threading directly into the chainring. I know it's been tested by a few people but... I'd guess the aluminum bushing takes most of the force and the bolt just holds it together. Is that right?
    2 wheels

  90. #90
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    Chainrings actually sit on a ledge on the spider. The bolts hold them tight to the spider and the spider does most of the work. This is true with regular chain ring bolts also.

  91. #91
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    Quote Originally Posted by artnshel
    Bruzed, Interesting solution, way to think outside the box to make a 30t work.
    I'm curious about the bolt threading directly into the chainring. I know it's been tested by a few people but... I'd guess the aluminum bushing takes most of the force and the bolt just holds it together. Is that right?
    That is correct. The shear load is on the bushing and extruded island on the middle ring, not the bolt.

  92. #92
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    Quote Originally Posted by yourdaguy
    Chainrings actually sit on a ledge on the spider. The bolts hold them tight to the spider and the spider does most of the work. This is true with regular chain ring bolts also.
    Not so with granny rings.

  93. #93
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    I'm still in line for 2. Looking forward to the ordering info. Very nice looking product and very interested to try it out. Especially for use by my wife.
    People should not be afraid of their governments. Governments should be afraid of their people.

  94. #94
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    So true

    Quote Originally Posted by hammerheadbikes
    We had a chat about pricing, he's definitely NOT getting rich off these
    I was shocked at how much he has into these in hard costs, not factoring in his time..
    he's practically paying you to take them!

    you should consider what he's doing as a service, getting you gearing that no one else can without changing cranks

    how much do you have invested in your bike?
    90-100 bucks is nothing and you will forget about it the first ride out...
    I paid more then $100 just for my RF turbine crankarms. It would be worth the $$ just use a two piece crankset.

  95. #95
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    Bruce Brown: aren't we talking about the middle ring in this case?

  96. #96
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    30 tooth availability

    The 30 tooth 104 bcd rings are available.

    If your interested, send me an email

    30tooth@gmail.com

  97. #97
    anyone else smell that?
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    nice work bruzed.
    1. Your signature can not be longer than 125 characters.

  98. #98
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    Very cool products but still glad I have several pair of 94bcd cranks though.

    BRUZED - will you be adding any 94bcd stuff to your line? There's still a need for more ring options in that pattern even though the sizing is not an issue.

  99. #99
    Map Maker
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    I am interested in your production process and glad to see you offering a product people want. Too much $$ for me right now though.
    Richmond, VA
    Ra-MORE mtb club

  100. #100
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    I run a 2x9 setup with a FRM crankset I got from Stan's 3 years ago. 94bc with a 30/42 Salsa rings. I wore the Extralite rings down pretty quick. Works great on the Austin dirt!

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