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  1. #201
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    Sooo nice, Yeyo..

    Vamos, que molan un huevo, tío...

  2. #202
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    Mattias, Your rings are an inspiration. I think I will play with my dremmel and some chainrings this weekend
    Also, how did you tune your M950 Crankset? Did you remove material evenly from the arms? Did you use a sander? I would like to tune something similar. thanks-

  3. #203
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    jthurd: yes i used a portable belt sander and a floor mounted belt sander.

    Then a smaller sander.

    I did this version for a time ago, I´m doing the very same process again but with more material grinded away this time on a another M950 crankset.

    Pics coming when I finetuned the spider.
    Experimental Prototype

  4. #204
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    I made a bunch XTR M960 and M970 chainrings today.
    You will se what I did but first I have to grind and run them on my steel brushing machine.

    But first, some in work shots.
    Taken by a Nokia E71.
    Attached Images Attached Images
    Experimental Prototype

  5. #205
    Fortes Fortuna Iuvat
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    Quote Originally Posted by indian fire trail
    Another fantastic job from Mattias that I´ve just received today...
    What kind of bolts are those red ones?
    Maverick Durance Ano-DUC32/C KING/XTR
    Mav ML8 Ano-DUC32/X0
    Mav ML8-DUC32/I9/XTR
    09 Spec. Demo-Totem-Ti DHX
    Norco Team DH

  6. #206
    It's about showing up.
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    I just read this entire thread

    It has been around for a bit and I never gave it a chance before. Who the heck would make these things. You guys are bull goose looney and I love it. Great work.

  7. #207
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    Quote Originally Posted by Datalogger
    What kind of bolts are those red ones?
    KCNC alu

  8. #208
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    Just received a small 28T chainring for my triple dura ace road crank.
    The dura ace has a very unusual 92mm BCD.
    The chainring turned out great! Very light but looks also very strong.

    Thanks Mattias
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  9. #209
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    Hve fitted my 58mm 27tooth ti rings

    Thanks to Mattias,
    I have fitted my 27 tooth rings to my 2 main riding bikes......a great option....easier on those climbs.....well worth it, lost weight & better gearing options
    All my mates here at the end of the world (New Zealand) are envious.
    A big thanks.......
    Now who makes a lite weight 28.6 front D band??????
    Next option a 40tooth ti 94.....if my wife lets me.......lol

  10. #210
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    It´s fun you all like my effort in these rings.

    Derailleur bands should be easy to make in 1mm titanium, have to think a little first about style.
    Experimental Prototype

  11. #211
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    Last job at the late evening, the kids and wife was gone.

    Grinding the toothtips and making them nice is left.

    Some hours more, later they are usable for anyone.
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    Experimental Prototype

  12. #212
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    I can't wait for my 36t and 40t!!!!!

    I am excited to try these out in 4X and DH race applications for you.

    They all look great.
    RUFUSPHOTO
    Action Sports Freelance Photographer
    www.ryancathrall.com

  13. #213
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    Is that one of my babies on the top row, 2nd from the right side (42t x 104 with extra meat?)?

  14. #214
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    Quote Originally Posted by BlownCivic
    Is that one of my babies on the top row, 2nd from the right side (42t x 104 with extra meat?)?
    No that´s not your.
    Your will be cut in next batch I ran out of sheets.
    Sorry!
    Experimental Prototype

  15. #215
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    That Bash ring looks amazing!

  16. #216
    Seeeriously easy Livin
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    hey rufus are you going for a super weight weenie build on your F-bomb, cant wait to see how light you can go.

  17. #217
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    i wondering it you are able to do something like that ...


    42-27 without spider for Cannondale crankset

    as this of FRM :

    http://cgi.ebay.com/FRM-Chainring-Set-for-Cannondale-SI-Crankarm-27-42tooth_W0QQitemZ190286004045QQcmdZViewItemQQptZCy cling_Parts_Accessories?hash=item190286004045&_trk sid=p3286.c0.m14&_trkparms=72:1240|66:2|65:12|39:1 |240:1318|301:1|293:1|294:50

  18. #218
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    Hi Eliflap, sure I can.
    I have to make measurements of the splines in center and see how it´s mounted.

    I will do it in titanium for longevity.

    Mail me at mattias@hellore.se if we can do something.


    Quote Originally Posted by eliflap
    i wondering it you are able to do something like that ...


    42-27 without spider for Cannondale crankset

    as this of FRM :

    http://cgi.ebay.com/FRM-Chainring-Set-for-Cannondale-SI-Crankarm-27-42tooth_W0QQitemZ190286004045QQcmdZViewItemQQptZCy cling_Parts_Accessories?hash=item190286004045&_trk sid=p3286.c0.m14&_trkparms=72:1240|66:2|65:12|39:1 |240:1318|301:1|293:1|294:50
    Experimental Prototype

  19. #219
    FIRENZE rulez !!
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    you got mail

  20. #220
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    Well, after a month testing I can say that Mattias´ 31 middle ring works very well...I haven´t noticed any lack of rigidity and the shifting is good (not as smooth as on Shimano but still pretty good)...
    Attached Images Attached Images

  21. #221
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    great job!

  22. #222
    FIRENZE rulez !!
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    my rings still work well....

    every one that see them ask if they are too fragile

    i reply to come with me and see with their own eyes


  23. #223
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    Good job! hve 2 agree with you

    Now I'm heading into winter in NZ the chain rings are lasting well.....no hint of wear or chain suck issues....best chain rings I have ever used....period!
    conditions here, wet lots of sticky clay mud, gravel roads with a fine covering of gravel....grit & lumpy quarry rocks.
    Just right for wearing chain rings or bending them. I ride 5-6 days per week from 1hr to 5+hr marathons.

  24. #224
    FIRENZE rulez !!
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    the rings are long lasting .... no wear signs ....

  25. #225
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    Never heard of copyright?

    Quote Originally Posted by Mattias_Hellöre
    Hi Eliflap, sure I can.
    I have to make measurements of the splines in center and see how it´s mounted.

    I will do it in titanium for longevity.

    Mail me at mattias@hellore.se if we can do something.

    Leonardi and FRM will be very happy that someone copy their products ...

  26. #226
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    dont FRM copy everyone else's stuff though ?

  27. #227
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    Quote Originally Posted by Tiffster
    dont FRM copy everyone else's stuff though ?
    Ok, so this is a very good reason.

    P.S.
    Certainly I'm not a FRM fan, but...

  28. #228
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    As long they aren´t patented it´s free for anyone to make copies, tough but true.
    Experimental Prototype

  29. #229
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    These are fully functioning works of art ! Its a shame to have them 'hidden' away behind a bash guard.

    Have done some serious testing on the new rings including a 24hr race and the shifting, wear, etc has been flawless ! Shifting requires firm/continous action on my modified setup and is not an issue.

    Thanks again for all the time and effort put into these rings !

    Hope to test the other set when I get some time to install them :-(

  30. #230
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    What PSI does the waterjet operate at? How narrow of a stream does it use?

    Is that MDF or something similar backing the sheet metal?

  31. #231
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    Quote Originally Posted by bad mechanic
    What PSI does the waterjet operate at? How narrow of a stream does it use?

    Is that MDF or something similar backing the sheet metal?
    I have a waterjet machine at my current primary job.
    That´s a Resato from netherlands.
    4000 Bar with a beam of 1.02mm.
    Should be exact down to 0.1 mm, but I have nothing to compare with.
    Experimental Prototype

  32. #232
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    Got mine today, so thanks Mattias for the nice Rings. The finish looks great and the weight even more! Now i´ll go for a ride and see how they perform.

  33. #233
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    Quote Originally Posted by nino
    i just asked Mattias to do me a 27t chainring as i love my 2x9 setup (29/42 with a 11-32 cassette in the back) but the 29t i am using is just missing that tiny bit on steeper hills. i sure could use a 11-34 cassette to get a lower gear but i don't like the big gaps of the 34 cassette and i don't like the added weight and i don't like to put a longer caged rear derailleur as well (even more added weight) and this would also ask for a slightly longer chain...correct - more weight again.

    so i asked Mattias to do me some 27t chainrings. 27/42 is the gearing the whole Swisspower Team (Frischi,Nino Schurter, Florian Vogel etc) is running. those guys use that special FRM integrated crankset which comes with that 27/42 gearing:
    http://www.frmbike.de/catalog/index....ppe=23&kategor

    this is usually not possible on a regular crankset.but by moving chainrings inwards you can run the 27t granny ring and the 42t on the middle position and leave the outer position alone. that's what Sabine Spitz used at the olympics as well (see pic below of her 30/42 setup) and i also have pics of Absalon with the outer chainring missing.

    when you look at the gearing a 27/42 gives the best mix and with a 32 in the back it should also cover steeper hills.

    Mattias has already done a drawing and it seems such a ring will weigh only 25g or even less out of Titanium. I'm already looking forward to try this setup. my friends of the Swisspower Team are really happy with 27/42. we will see....
    Nino:

    What do you think of the Specialites TA Chinook chainrings that you were using?
    Thanks

  34. #234
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    Hi Mattias, I just sent you an email.

  35. #235
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    Quote Originally Posted by schuster_md
    Nino:

    What do you think of the Specialites TA Chinook chainrings that you were using?
    Thanks
    What i think?
    They look good, shift good but weigh a ton.

  36. #236
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    Mattias can you make one of these sprockets if I send you one to measure?
    It would be flat and made in Ti. It's for a shimano Alfine Hub.

    sprocket.JPG
    _______________
    1x10 IS SO FINE on my 21.9 lbs IBIS SL-R
    11-36 XTR in the rear, 36T wide-narrow upfront

  37. #237
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    Quote Originally Posted by biketuna
    Mattias can you make one of these sprockets if I send you one to measure?
    It would be flat and made in Ti. It's for a shimano Alfine Hub.

    sprocket.JPG
    OOH!!!

  38. #238
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    i have a question, do you make bash guards as well Mattias?
    "If women don't find handsome , they should at least find you handy."-Red Green

  39. #239
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    biketuna: yes i can, send me accurate measurements of the splines and hole diameter.

    nuck_norris: i can do bash guards in 6061 aluminum 2mm or 4.8mm as well.

    drop me a mail at mattias@hellore.se so i can send drawings.
    Experimental Prototype

  40. #240
    I Tried Them ALL... SuperModerator
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    Quote Originally Posted by Mattias_Hellöre
    This chainring is for a MTBR member.
    Mattias, is this supposed to replace the M960 44t chainring? How did it perform? I am looking at 42/29t for my M960. Is this possible?
    "This is a male-dominated forum... there will be lots of Testosterone sword-shaming here" ~ Kenfucius

  41. #241
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    Let us know when you make rings for XTR M960...thanks!
    "This is a male-dominated forum... there will be lots of Testosterone sword-shaming here" ~ Kenfucius

  42. #242
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    Zachariah, I´ve done many M960 specific rings.
    In the 102mm circle (middle ring) lowest is 31T, if you want 29T, use the granny bolt circle at 64mm.
    Move the outside ring to middle - done.
    Experimental Prototype

  43. #243
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    mattias you havent thought about making some rotors?

  44. #244
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    Quote Originally Posted by liam2051
    mattias you havent thought about making some rotors?
    Rotors would be nice to do but more scary as there´s more forces involved and a failure would be catastrophic.

    Maybe for personal use though.
    Experimental Prototype

  45. #245
    FIRENZE rulez !!
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    and what about the Cannondale spider in titanium ?

    110-74 BCD ....

  46. #246
    FIRENZE rulez !!
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    please take a look ...

    a 800-900 km done on this set up

    NO issues , NO failure , NO wear ... and a weight .... WOW

    SI spider and bolts are a half of weight


  47. #247
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    eliflap: I have a standing wish with 110-64 in aluminum, I have some 6061 here so I try if I can do it cheaply enough and anodized.
    Experimental Prototype

  48. #248
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    Quote Originally Posted by Mattias_Hellöre
    eliflap: I have a standing wish with 110-64 in aluminum, I have some 6061 here so I try if I can do it cheaply enough and anodized.
    Mattias did you mean 110/74 BCD spider?

  49. #249
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    Quote Originally Posted by Mattias_Hellöre
    Zachariah, I´ve done many M960 specific rings.
    In the 102mm circle (middle ring) lowest is 31T, if you want 29T, use the granny bolt circle at 64mm.
    Move the outside ring to middle - done.
    yep it works great ! plus you have the outside to install a very lightweight bash guard too !

  50. #250
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    Quote Originally Posted by Mattias_Hellöre
    eliflap: I have a standing wish with 110-64 in aluminum, I have some 6061 here so I try if I can do it cheaply enough and anodized.

    sent mail

    110 - 74

  51. #251
    xx = xtr˛
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    This thread is pretty interesting, would it be possible to make chainrings for XTR M900 cranks? 110-74 mm BCD 5 bolt 29-39-49 T, in aluminium?

  52. #252
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    Zakarina: yes it´s possible, drop me a mail to mattias@hellore.se
    Experimental Prototype

  53. #253
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    I did a own version of the FRM rings combo for Hollowgram cranks but four more holes for the more common 64mm BCD chainrings for flexibility.

    A lot more tuning potential in this version.
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    Experimental Prototype

  54. #254
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    Nice work Mattias, i hope my rings will look that good!!

  55. #255
    FIRENZE rulez !!
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    i am so excited to receive at home in a few days


    wowww

  56. #256
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    Oops,

    my 29T x94 broke.
    I think it's because the chainring bolts weren't tight anymore. During a race the bolts came loose I guess and then after the race i was just a bit pedalling around to get those legs fresh again and in a very easy stupid climb the chainring broke.
    When I got back and checked the bolts 4 of the 5 bolts came loose. This never happened to me before but heck, there's a first time for everything...
    I'm sure the chainring would have hold on when the bolts wouldn't came loose.

    I will contact you soon Mattias, You can also make for a Campagnolo Compact crankset?

    Photo's:

    If You want Plush, Buy a Couch...
    If you want to go Fast, Buy a 29er

  57. #257
    Go faster!
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    guess this chainrings are TTTTOOOO MUCH tuned?

  58. #258
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    I don't think it would have snapped when the bolts would be tight.
    It survived a lot of races before it broke. so I'm sure it can handle the force I was using at the moment of breaking...
    If You want Plush, Buy a Couch...
    If you want to go Fast, Buy a 29er

  59. #259
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    Hi Ninko, write me a line at mattias@hellore.se so I can help you.
    No bolt circle is impossible.
    Experimental Prototype

  60. #260
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    Is it just me, or is the junction where the reinforcement coming from the bolt hole meets the tooth ring too angular? On all the busted rings in this thread it looks like it was due to loose chainring bolts, and the failures were at that point... That says "stress riser" to me. So maybe rounding that junction out with just a tad more material there, and a healthy dose of Loctite on the chainring bolts and we would have a winner?

  61. #261
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    Is it possible that the dimmunitive nature of the material around the bolt holes is leading to flexing that in fact causes the loosening of the bolts? i.e.: the metal working back and forth actually turning the nut or bolt or combination of both, leading to the loosening?

  62. #262
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    I would believe that as well. Maybe all 3 issues.

  63. #263
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    my 27 58mm going strong

    I take your point on the issues, but I'm using steel botls and they are still tight. I have had issues in the past with alloy bolts not handling the stress and working loose. Switching to steel male (a bit heavier) into alloy female seems to have done the trick for the past 10 years on the middle rings I use. A small amount of ti prep keeps them from siezing too.

  64. #264
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    Just check them regularly. I've rode them pretty much this year in a lot of races, But they cranked finally on the worldcup track in Houffalize wich is a very demanding track for the material. I think it just came loose by the bouncing terrain.
    If You want Plush, Buy a Couch...
    If you want to go Fast, Buy a 29er

  65. #265
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    hi

    what is the weight of 32T ring ? my Extralite weight 31gr

  66. #266
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    Quote Originally Posted by Robin v Berkel
    hi

    what is the weight of 32T ring ? my Extralite weight 31gr
    It depends on bolt circle, style and material.
    Experimental Prototype

  67. #267
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    Quote Originally Posted by Robin v Berkel
    hi

    what is the weight of 32T ring ? my Extralite weight 31gr
    I just sent a 31T 104mm BCD to a mtbr member, weighing at 22 grams.
    Made some of this type, all of them still functioning well.
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  68. #268
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    Hi Mattias:

    Any news about the 110/74 spider for the Cannondale crank?

    RGDS,

    A.S.
    Last edited by schuster_md; 06-15-2009 at 09:18 AM.

  69. #269
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    Quote Originally Posted by Mattias_Hellöre
    I just sent a 31T 104mm BCD to a mtbr member, weighing at 22 grams.
    Made some of this type, all of them still functioning well.
    Is that my ring Mattias? It looks awesome! Any chance of getting a pic of the other rings?

  70. #270
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    Quote Originally Posted by schuster_md
    Hi Mattias:

    Any news about the 110/74 spider for the Cannondale crank?

    RGDS,

    A.S.
    Here is a rough drawing, I haven´t edited as per your comments yet.
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  71. #271
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    Is possible to made disc brake rotors of steel or titanium?

  72. #272
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    Francesc: it´s possible but I will stay away from them just because there´s possible catastrophic failures and there´s other affordable sellers on the market.
    Experimental Prototype

  73. #273
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    Sub 40 gram spider, some more development needed.

    Already ordered and got two 7075-T6 plates to be cutted.
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  74. #274
    Don't be hasty.
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    I think you should go with a different style or size of cutout for the ovals, the randomness of the connections between the center and the arms doesn't seem like a good idea.

  75. #275
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    Quote Originally Posted by Soya
    I think you should go with a different style or size of cutout for the ovals, the randomness of the connections between the center and the arms doesn't seem like a good idea.
    I agree. That was was exactly my first thought.

  76. #276
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    True, I did a quick sketch up, checking the weight, then I will finetune as most of them do prefer low weight and custom bolt circle.

    That´s not a final design, some simulation will be done before I send them to a water jet cutter.
    Experimental Prototype

  77. #277
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    Sub 35 grams as is.
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  78. #278
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    That spider design appears to have some 3D machining as well as 2D water jet cutting, have you been able to add some CNC mill capability?
    I'm a member of NSMBA and IMBA Canada

  79. #279
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    Quote Originally Posted by rockyuphill
    That spider design appears to have some 3D machining as well as 2D water jet cutting, have you been able to add some CNC mill capability?
    Hi, currently - no, there´s no need for 3D machining.
    For most of my one-offs I use manual machines.

    For example this is completely hand made.
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  80. #280
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    36T cassette sprocket.
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  81. #281
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    That 36T sprocket is fantastic!

  82. #282
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    How much for the 36 cog?

    Hi Mattias,
    How much for the 36 tooth? That would be useful some times.

  83. #283
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    Quote Originally Posted by Mattias_Hellöre
    Sub 35 grams as is.
    Hi Mattias:

    I was looking at your prototype and it looks great. I wanted to know how are you gonna solve the issue of maintaining the distance between the outer and inner chainring as the 74BCD ring must be screwed to the holes in the spider like this old triple CODA spider that include a separation and the outer ring (110BCD) goes in the middle position.
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    Last edited by schuster_md; 06-17-2009 at 09:15 PM.

  84. #284
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    schuster_md: I thought about washers just because of my chainrings are in 2mm thickness and others are much thicker so It would screw up the spacing.

    My thought is to only use as few machines as possible to get a light and good product.
    Experimental Prototype

  85. #285
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    Mattias, is that 36T cassette sprocket Aluminum?

    That would be a great idea to have 34T and 36T in alu
    as wear will be not a lot (think in the 22-36T alu front chainring)
    and combined with XTR sprocket (changing two smallest sprockets for 1)
    would result in a very interesting config.

    and remember you can ad holes between arms, near the teeth

  86. #286
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    Quote Originally Posted by STS
    Mattias, is that 36T cassette sprocket Aluminum?

    That would be a great idea to have 34T and 36T in alu
    as wear will be not a lot (think in the 22-36T alu front chainring)
    and combined with XTR sprocket (changing two smallest sprockets for 1)
    would result in a very interesting config.

    and remember you can ad holes between arms, near the teeth

    The 36T is in titanium, I can always make ones in aluminum but the spline interface to the cassette body will be weak.

    The choice is yours.
    Experimental Prototype

  87. #287
    STS
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    as light hubs normally have alu body, that should be right
    best would be the alu sprocket in one piece including the spacer
    but that is only possible with CNC from a thicker alu sleve

  88. #288
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    another happy customer, thanks.
    28t Al 58bcd 20.4g
    29t Al 94bcd 15.3
    30t Al 94bcd 18
    29t Ti 94bcd 15.8

  89. #289
    FIRENZE rulez !!
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    i saw now the spider for Cannondale as i asked in post #250


    simply incredible !

  90. #290
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    is this one a bash guard ?


    for which ring ? 36T ?
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  91. #291
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    just fitted a 40ti from mattias

    A g8 chain ring....but I needed to use some 1.1mm spacers under the chain ring to get it close enough to the 27 for the m970 shifter/deraliers to work consistently. A few hours messing around nearly drove me nuts......bloody shimano..& their spacing
    That was never a problem with my twist shifters on the other bike.
    Oh well she works now

  92. #292
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    One more batch came today.
    Larger and larger batches every time.
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  93. #293
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    11T derailleur pulley with SKF 625Z
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  94. #294
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    How much would a 27t ring in a 64mm BCD cost/weigh?

  95. #295
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    Everyone: any price quotation mail me at mattias@hellore.se .
    I´m not selling anything here in this thread.
    Experimental Prototype

  96. #296
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    Mattias, very interesting thread showing the evolution of you designs and range of products. I've also read your other thread with the XTR 960 with the 42/ 27 rings and waiting on performance reports for that set up.

    Also a Zaskaraholic

  97. #297
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    Matt are you liable to make any other Ti hardware?

  98. #298
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    jw8725: I can make some stuff, drop me a mail.
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  99. #299
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    Matthias , see post #290 and reply me.

    and : a 10T pulley is available too ?

  100. #300
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    Quote Originally Posted by eliflap
    Matthias , see post #290 and reply me.

    and : a 10T pulley is available too ?
    Hi Eliflap, that´s for a 32T, can make a another one for any ring size you want.

    10T pulley is no problem.
    Want one?
    Experimental Prototype

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