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  1. #1
    Mr.650b - Mr.27-5
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    New SOMA 650B single speed?

    With a name like the "B side" it is sure to be a hit!

    http://www.somafab.com/somanews.html
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  2. #2
    Single Speed
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    Maybe....

    another tire and tube size to keep up with, but might be just the ticket. Maybe make it a 29/650er or a 650/26"er I do like the Soma's, I have a groove, 4one5 and Pake. B-Side might round out the stable.

  3. #3
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    Hm:
    I guess my old Rocky Mountain would make a fine 67.5er ;-)

    But first impression says that Soma sounds and looks good.

  4. #4
    Mr.650b - Mr.27-5
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    Quote Originally Posted by pooka
    Hm:
    I guess my old Rocky Mountain would make a fine 67.5er ;-)

    But first impression says that Soma sounds and looks good.

    The Soma ought to be a blast! Word is Origin 8 will be showing one too... And then there is Rawland Cycles, a 650B only company launching the new brand at Interbike in a couple weeks. Those and the 8-9 other 650B MTB's that will be on display in Vegas, promises to make the 650B wheel very popular in the next few years.

    Independent Fabrication isn't showing this year, but they did build a 650B MTB single speed for a guy who raced in the SSWC this past week end. I hope to have a full race report soon. See pic below:

    LOTS MORE 650B INFO HERE:

    http://www.bikeradar.com/news/articl...tb-tires-11794

    http://cyclingplus.co.uk/newsdetails.asp?id=688

    http://www.frameforum.net/forum2/ind...showtopic=3034

    http://www.cyclingnews.com/tech/2007...ults/nahmbs074
    click thumbnail for more pics.

    http://rawlandcycles.com/

    cheers,

    KP
    Attached Images Attached Images
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  5. #5
    bike geek
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    Slightly off topic, but while on the subject of 650b...

    Kirk-

    Any word on how the beads of your Neo Moto tires fit on the 650b Blunt rim? I ask because there are reports on the 29er board of loose-fitting beads and tire blow-offs with the 29er Blunt (not just the Blunt, to be fair). Wondering what the story is with the 650b version.

    Also, do you know what drillings the 650b version of the Blunt is available in?

    Thanks

  6. #6
    Mr.650b - Mr.27-5
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    Quote Originally Posted by tamjam
    Kirk-

    Any word on how the beads of your Neo Moto tires fit on the 650b Blunt rim? I ask because there are reports on the 29er board of loose-fitting beads and tire blow-offs with the 29er Blunt (not just the Blunt, to be fair). Wondering what the story is with the 650b version.

    Also, do you know what drillings the 650b version of the Blunt is available in?

    Thanks
    TJ,

    There is no word yet things are still too new to know for certain. In my opinion, the tires fit on the "loose side", [especially compared to some tubeless systems] but certainly acceptable. Fwiw, Panaracer has guaranteed that they won't come off the rim.

    The blunts only come in 32 hole drillings at the moment, but I am sure they could be had in other configurations should demand justify them.


    Cheers,

    KP
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  7. #7
    Mr.650b - Mr.27-5
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    Update!

    I just mounted some tires to a set of American Classic 650B MTB wheels that landed here the other day.
    The wheels were built with the 28mm wide Velocity "Blunt" rim and weigh in at 1,750g according to the manufacturer, but I have not weighed them myself yet.

    The fit of the tire to the rim could not be better (perfect?). In fact it is as good as or better than any rim / tire combo that I have ever personally mounted (YRMV). The tire goes on fairly easy and without tools but requires just enough force to give your thumbs a nice work out while seating the bead.

    NOTE: I put a 26" wheel in the picture for scale. I tried to crop the shot to best show the size difference between the wheel sizes.
    Attached Images Attached Images
    Last edited by Kirk Pacenti; 09-08-2007 at 01:02 PM.
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  8. #8
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    So the hub is American Classic and the rim is Velocity right? That pic is cool and that's a decent difference in wheelsize. Now I really wanna try one!

  9. #9
    bike geek
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    Quote Originally Posted by Kirk Pacenti
    I just mounted some tires to a set of American Classic 650B MTB wheels that landed here the other day.
    The wheels were built with the 28mm wide Velocity "Blunt" rim and weigh in at 1,750g according to the manufacturer, but I have not weighed them myself yet.

    The fit of the tire to the rim could not be better (perfect?). In fact it is as good as or better than any rim / tire combo that I have ever personally mounted (YRMV). The tire goes on fairly easy and without tools but requires just enough force to give your thumbs a nice work out while seating the bead.
    Great news KP. Now if you could just convince Velocity to do a run of 36h rims, and have them done by the end of Sept, I might just have go with a 650b front wheel on my current (MTB tandem) project instead of 29.... (seriously)

    Brian

  10. #10
    Wandering not Lost
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    beyond possible sizing concerns, or full sus geo problems Why 650B over a 29'er?

    Open minded here ...so not just a naysayer. Currently on a 29'er and love the ride...

    enlighten me:

  11. #11
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    Quote Originally Posted by BThor
    beyond possible sizing concerns, or full sus geo problems Why 650B over a 29'er?

    Open minded here ...so not just a naysayer. Currently on a 29'er and love the ride...

    enlighten me:
    I agree. Looking for more info. If 29er wheels work so well, why do we want less tire contact patch and less object "angle of attack"?

    I too am not against change, I just want to know why first.

  12. #12
    Stubby-legged
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    Sign me up...

    on the WHY? front.
    With 26ers, 29ers,96ers,69ers....
    Kirk, Davis, and others... why anothr size?

    By the way, Kirk, you left out Davis at Carver bikes out of your list.

  13. #13
    artistic...
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    why 650B?
    Because 29er wheels have some serious limitations to design a bike around. not everybody likes loooong wheelbases. not everybody likes the way a 29er rear wheel behaves.
    not to mention FS which is actually the main reason behind the new format's future domination.
    29er wheels will go the way of the 1 1/4 headset.

  14. #14
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    Most of this is theoretical at this point, since the tires are so new, but the goal is to get the bigger contact patch and momentum advantages of the 29er wheels with the snappier, shorter wheelbase geometry of the 26 inch wheel frames. Apparently a number of builders have expressed an interest because you can use "standard mtb geometry" with this wheel diameter. And I agree, the big advantage with this wheel will be found in full suspension frames, but the first bike I build using 650B will be a SS!


  15. #15
    Stubby-legged
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    ohhhhh, I see

    Doesn't this dilute and further divide the field?
    How has the tire manufacturers responded to "yet another tire" size?

    I am one who would benefit from bigger wheels and conventional geometry. I slot into the "Not quite tall enough for a 29er." So I ask, not to be the devil's advocate, but to gather more info.

  16. #16
    Mr.650b - Mr.27-5
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    Quote Originally Posted by 1spd1way
    Doesn't this dilute and further divide the field?
    How has the tire manufacturers responded to "yet another tire" size?

    I am one who would benefit from bigger wheels and conventional geometry. I slot into the "Not quite tall enough for a 29er." So I ask, not to be the devil's advocate, but to gather more info.

    I don't think so, it's just another option. The rim size has been around for nearly a century and is quite common around the world. The only "new" part is the MTB application.

    Tire makers are happy to make whatever you ask for. Panaracer is making my tire now, and I have heard rumor that other brands are considering the size.

    Response from bike makers has been overwhelmingly positive. Custom builders will lead the charge because the are small enough and versitle enough to build just about anything a customer might want. The bigger players will certainly take more time to embrace it, but my feeling is that its a function of their size not lack of interest. I can say there are a few BIG players testing my tires and wheels now.

    More to come after Vegas...
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  17. #17
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    Without attempting to give Kirks gameplan away, basically as mentioned earlier 29ers are limiting. They do have some serious design issues/impediments call-them-what-you-will that are generally ignored by people desperate enough to be one of the cool kids or wanting to push their own barrow.

    29ers of course have their place, but the impetus here from Kirk is to bring the advantage of the larger wheel across more platforms to more riders.

    Because of physical design limitations, the 29" wheel can't bring that.

    As for the 'dilute and divide', I don't think that's the case. I've always assertained that wheel size should vary for the size of rider, just as every other part on the bike does, and all another wheel size gives is just more options for riders out there. Not only that, it invigorates the market, so you get discussion, debate, passion, more options, less limitations......all this sounds pretty good to me!

    Kirk is putting his ass on the line bigtime here and I hope it pays off for him.
    No longer member of the bike industry nor society, so don't hassle me.

  18. #18
    artistic...
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    Quote Originally Posted by Thylacine
    Without attempting to give Kirks gameplan away, basically as mentioned earlier 29ers are limiting. They do have some serious design issues/impediments call-them-what-you-will that are generally ignored by people desperate enough to be one of the cool kids or wanting to push their own barrow.

    29ers of course have their place, but the impetus here from Kirk is to bring the advantage of the larger wheel across more platforms to more riders.

    Because of physical design limitations, the 29" wheel can't bring that.

    As for the 'dilute and divide', I don't think that's the case. I've always assertained that wheel size should vary for the size of rider, just as every other part on the bike does, and all another wheel size gives is just more options for riders out there. Not only that, it invigorates the market, so you get discussion, debate, passion, more options, less limitations......all this sounds pretty good to me!

    Kirk is putting his ass on the line bigtime here and I hope it pays off for him.
    this is your best post ever..

  19. #19
    Mr.650b - Mr.27-5
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    Quote Originally Posted by Thylacine
    Without attempting to give Kirks gameplan away, basically as mentioned earlier 29ers are limiting. They do have some serious design issues/impediments call-them-what-you-will that are generally ignored by people desperate enough to be one of the cool kids or wanting to push their own barrow.

    29ers of course have their place, but the impetus here from Kirk is to bring the advantage of the larger wheel across more platforms to more riders.

    Because of physical design limitations, the 29" wheel can't bring that.

    As for the 'dilute and divide', I don't think that's the case. I've always assertained that wheel size should vary for the size of rider, just as every other part on the bike does, and all another wheel size gives is just more options for riders out there. Not only that, it invigorates the market, so you get discussion, debate, passion, more options, less limitations......all this sounds pretty good to me!

    Warwick gets it!

    This is basically the same response I have gotten from all professional Bike Designers I’ve discussed the project with. They all seem to see the advantage of this wheel size right away and with very little discussion or convincing. The key is to think of the bicycle as a whole and how each part impacts another.

    Product managers and end users are far more skeptical. But they don't have the benefit of having built and or designed thousands of bike frames to convince them this is the right platform for most contemporary / future bike designs.

    Fwiw, I also believe all wheel sizes have their place and will continue to exist and even expand. I don't view any one size as "better" than another. Neither do I think wheel size has to be an "either or" choice, but rather "both and"...
    Last edited by Kirk Pacenti; 09-09-2007 at 07:43 PM.
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  20. #20
    Stubby-legged
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    Ok, I get it

    Thanks for the info. I look forward to more info after Interbike.

  21. #21
    Exclusively Single
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    I like the looks of the 650b's. I've been saying to myself for some time now that something between a 29" and 26" could potentially be the ideal all-around size and I'm glad to see it happening.

    I understand how this size can fix design limitations for shorter riders and FS bikes, but on a rigid SS for an average or taller rider what might be the advantages other than a reduction in rotational weight (e.i. quicker acceleration) and a slightly stronger wheel?

    Kirk, I'm very curious in the differences between 650b vs. 29" in regards to acceleration, maintaining momentum, wheel strength and weight, and smoothness on the trail.

    I'm just about to build a new 29er non-disc wheel set with Surly hubs (high flanges) and Sun CR18 rims with DT Comps, so the result should be a rather strong wheel set with relatively low rotational weight. I'm just trying to better determine how much lighter, quicker and stronger a similarly built 650b wheel set would be whereas the only disadvantages I can foresee would be that the smaller size may not roll as smoothly, climb over obstacles nor maintain momentum as well due to the increased angle of attack (from a 29") though the difference may be negligible.

    What I really want to hear is that I need not concern myself with the matter so I don't have to start planning to buy a new frame, rims and tires.

  22. #22
    Mr.650b - Mr.27-5
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    Quote Originally Posted by long hazy daze
    I like the looks of the 650b's. I've been saying to myself for some time now that something between a 29" and 26" could potentially be the ideal all-around size and I'm glad to see it happening.

    I understand how this size can fix design limitations for shorter riders and FS bikes, but on a rigid SS for an average or taller rider what might be the advantages other than a reduction in rotational weight (e.i. quicker acceleration) and a slightly stronger wheel?

    Kirk, I'm very curious in the differences between 650b vs. 29" in regards to acceleration, maintaining momentum, wheel strength and weight, and smoothness on the trail.

    I'm just about to build a new 29er non-disc wheel set with Surly hubs (high flanges) and Sun CR18 rims with DT Comps, so the result should be a rather strong wheel set with relatively low rotational weight. I'm just trying to better determine how much lighter, quicker and stronger a similarly built 650b wheel set would be whereas the only disadvantages I can foresee would be that the smaller size may not roll as smoothly, climb over obstacles nor maintain momentum as well due to the increased angle of attack (from a 29") though the difference may be negligible.

    What I really want to hear is that I need not concern myself with the matter so I don't have to start planning to buy a new frame, rims and tires.
    How tall are you?
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  23. #23
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    I'll buy a Lenz 650B Leviathan. Devin?

  24. #24
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    Quote Originally Posted by Kirk Pacenti
    How tall are you?
    6'1" -barefooted.

    And I must say those new tires of yours look particularly sweet!

    Any plans for future production in other sizes?

  25. #25
    Mr.650b - Mr.27-5
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    Quote Originally Posted by long hazy daze
    6'1" -barefooted.

    And I must say those new tires of yours look particularly sweet!

    Any plans for future production in other sizes?

    You’re a perfect candidate for this wheel size. I am 6-0 and have been riding 29ers for a long time and always felt that a slightly smaller wheel would probably be better.... 29" wheels really start to make sense for riders 6-4 and up [impo].

    Yes, I have more tires planned. The next one should be ready in January and then another in June or July...

    Cheers,

    KP
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  26. #26
    Mr.650b - Mr.27-5
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    Quote Originally Posted by Wish I Were Riding
    I'll buy a Lenz 650B Leviathan. Devin?

    Funny you should mention Lenz. The last time I spoke to Kent Eriksen he said he was going to speak with Devin about getting a custom rear end for a 650B he FS he was thinking of building. I won't put words in Kent's mouth, but he is nearly as excited about the possibility of the 650B wheel size as I am!

    Fwiw, I'd prolly by a 650B Leviathan too!
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  27. #27
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    Kirk -

    Any chance you've spoken with Sherwood at Ventana? I'm thinking a 650B El Salt or a Fuego. Fun to think about for sure . . .


  28. #28
    Mr.650b - Mr.27-5
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    Quote Originally Posted by AllRounder
    Kirk -

    Any chance you've spoken with Sherwood at Ventana? I'm thinking a 650B El Salt or a Fuego. Fun to think about for sure . . .


    I have sent several emails and left several voice messages for Sherwood. He is a really busy guy and I really am not surprised that he's not had a chance to get back to me yet. However I do plan to visit him at the IB show and discuss this with him.

    I am very hopeful that he'll build a few bikes to test. IMO, his design is one that would easily lend itself to this wheel size. Cutting a stock 29'er rear end down to an appropriate length for a 650B wheel should be a no brainer and then it's just a matter of adjusting the BB height and building for the appropriate fork length. I have some White Brothers "Fluid 130" forks on the way and they would be a perfect fit for this bike with a 517mm AC dimension and 44mm of offset this frame / fork combo would kick butt!


    The truth is though... I can bug bike makers till the cows come home and they can think it's a great idea too, but with out demand from the consumer it's not going to get far. Have you tried calling Sherwood? Most makers are interested in hearing what products customers would like to see in their line up...
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  29. #29
    Stubby-legged
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    What about ..

    Someone 5'4". Please tell me 650b will make it possible for the midgets of the world!

  30. #30
    I don't huck.
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    I am really interested in this concept. I have been riding for enough years to remember the 1.5" headset size. The builder I was working with was using them to allow for larger diameter HTs and easier miters on the TT and DTs. Anyway, when 1 1/8" came out, we were like, "What, another size?"

    But look what happened and for good reasons. 1 1/8th hit the target almost perfectly with just enough to be an improvement over 1" and not quite the narrower niche of 1.5".

    More recently I have been VERY interested in 29ers. I really WANT to like them (I am tall, 6'2") I have tried a HT Jamis Exile 29er and I just rented a Ventana El Rey to try on local trails (So Cal). Man, I was stoked on the way up the fireroad and really bummed on the return singletrack (loose, rocky, twisty). It just felt too much here like I was riding my Dad's bike. I have cash in hand and I cannot get myself to pull the trigger on a fully sus yet. I don't think they have it figured out yet, geometry, etc. My CDale Prophet just rips through this trail.

    BUUUUTttt I loved the feel in the climbs soooo if I could get some of the good (climbing, rolling, better over chaff on the trail) and less of the balloon feeling on quick transitions and dips and difficulty in manualing the bike, and 'not-sure-how-to-make-this-handle-well' geometry I would be writing a check. Can't wait for Interbike and after!

    I keep thinking baby bear, momma bear, poppa bear and the whole concept of "Juuuust right".

    Signed,

    "$$$ in hand and no where to spend it????"

  31. #31
    Mr.650b - Mr.27-5
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    Quote Originally Posted by 1spd1way
    Someone 5'4". Please tell me 650b will make it possible for the midgets of the world!

    Yes, of course you can ride a 650B! That is the real beauty of this wheel size; you get the biggest wheel possible to fit in standard 26" wheel frame geometry. the only change needed is for the designer / builder to adjust the BB height.

    In fact, I dropped a wheel set into a Surly 1x1 I have here and it's as if the bike was made for these wheels!
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  32. #32
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    Quote Originally Posted by mtroy
    I am really interested in this concept. I have been riding for enough years to remember the 1.5" headset size. The builder I was working with was using them to allow for larger diameter HTs and easier miters on the TT and DTs. Anyway, when 1 1/8" came out, we were like, "What, another size?"

    But look what happened and for good reasons. 1 1/8th hit the target almost perfectly with just enough to be an improvement over 1" and not quite the narrower niche of 1.5".

    More recently I have been VERY interested in 29ers. I really WANT to like them (I am tall, 6'2") I have tried a HT Jamis Exile 29er and I just rented a Ventana El Rey to try on local trails (So Cal). Man, I was stoked on the way up the fireroad and really bummed on the return singletrack (loose, rocky, twisty). It just felt too much here like I was riding my Dad's bike. I have cash in hand and I cannot get myself to pull the trigger on a fully sus yet. I don't think they have it figured out yet, geometry, etc. My CDale Prophet just rips through this trail.

    BUUUUTttt I loved the feel in the climbs soooo if I could get some of the good (climbing, rolling, better over chaff on the trail) and less of the balloon feeling on quick transitions and dips and difficulty in manualing the bike, and 'not-sure-how-to-make-this-handle-well' geometry I would be writing a check. Can't wait for Interbike and after!

    I keep thinking baby bear, momma bear, poppa bear and the whole concept of "Juuuust right".

    Signed,

    "$$$ in hand and no where to spend it????"
    Email me off list and I will get you pointed in the right direction, even if I have to build the thing myself! I am positive that a 650b wheel will address the issues you mention here perfectly!

    You are right on target about the "just right" part. But one of the reasons I bailed on the "Baby Bear" name is that I didn't want to set up an “us vs. them” attitude around this wheel size compared to the other available sizes. I am doing all that I can to remain objective and not get too dogmatic about the 650B size.

    Admittedly, this is hard to do considering I really do think the size will work better for more people / applications. Not to mention the small fortune I have spent bringing these tires to market.
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  33. #33
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    Quote Originally Posted by Kirk Pacenti
    In fact, I dropped a wheel set into a Surly 1x1 I have here and it's as if the bike was made for these wheels!

    Doh! You just gave away my top secret project! I'm building up a 1x1 with 650B wheels and drop bars to bomb around on this winter. When you look at the low bottom bracket and "Fatties Fit Fine" clearance, you're right - it looks like the 1X1 was meant to run the 650B wheels. And I'm building up some Hope wheels that I'll run SS with spacers. That way I can transfer them to that Ventana or a Waltworks next spring, if I like them wheels.


  34. #34
    I don't huck.
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    Quote Originally Posted by Kirk Pacenti
    Email me off list and I will get you pointed in the right direction, even if I have to build the thing myself! I am positive that a 650b wheel will address the issues you mention here perfectly!

    You are right on target about the "just right" part. But one of the reasons I bailed on the "Baby Bear" name is that I didn't want to set up an “us vs. them” attitude around this wheel size compared to the other available sizes. I am doing all that I can to remain objective and not get too dogmatic about the 650B size.

    Admittedly, this is hard to do considering I really do think the size will work better for more people / applications. Not to mention the small fortune I have spent bringing these tires to market.
    Thanks. Email sent.

    mt

  35. #35
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    signed

  36. #36
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    Really cool.

    I have experienced the benefits of larger wheels and at 6'3" I can fit well enough on 29ers. But its been clear to many that 29" wheels can only accomodate a significant percentage of riders if sacrifices are made to frame design. Its great to see an option that offeres benefits for everybody. (It will be interesting to see if the 29er fanatics will accept that 650B is as legitimate as any wheels size under their logic that the wheel should fit the rider.)

    More than anything it is great to see people pursuing something different and a little bit risky because they believe that good ideas will generate their own market.

  37. #37
    Stubby-legged
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    Someone, please tell me...

    Are the benefits of this wheel size going to be for the 6'0'er's!
    Seems like a larger wheel size with conventional 26er geometry was talked about somewhere here.
    Please tell me it's true

  38. #38
    Mr.650b - Mr.27-5
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    Quote Originally Posted by 1spd1way
    Are the benefits of this wheel size going to be for the 6'0'er's!
    Seems like a larger wheel size with conventional 26er geometry was talked about somewhere here.
    Please tell me it's true

    Yes, it's all true!

    Fwiw I am 6'-0" and I think this will be the perfect size for me. I have always felt 26" wheels were a little to small and 29" a little too big... I have been very happy with the way the bike rides with these wheels!

    My NAHBS bike has been getting a thorough review at Dirt Rag, and the results should be going to press in the next issue (or the one after that). Though they have not divulged any of their test findings, the test rider has said that he's had "a lot of fun on the bike". Sounds good to me.
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  39. #39
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    oops!1

    I left out the part that I'm 5'4''. Are the benefits going to extend down to midget sizing/

  40. #40
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    Quote Originally Posted by 1spd1way
    I left out the part that I'm 5'4''. Are the benefits going to extend down to midget sizing/
    If you can ride a 26er you can ride these. The beauty is that these wheels fit in standard 26" wheeled geometry designs with very few mods needed.

    I just dropped these wheels in a Surly 1x1 and it's like the bike was made for these wheels! (of course you have to use disk brakes because the canti studs are in the wrong place)
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  41. #41
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    YeeHaaaaaa11

    I happen to own a 1x1 and a Carver96er. Looks like a set of wheels and tires have moved up the list!

  42. #42
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    Quote Originally Posted by 1spd1way
    I happen to own a 1x1 and a Carver96er. Looks like a set of wheels and tires have moved up the list!

    Your LBS can order wheels from Velocity USA, BTI, J&B, QBP and probably several other places.I will have tires here soon, as will Merry Sales, BTI and J&B.

    The surly is a perfect candidate because of the massive clearance and low BB. With the 650B wheel (and 2.3 tire) shoved all the way forward, there is more clearance than you'll ever need. And the BB goes up from a relatively low 11.5" to a relatively normal 12.1". This bike should ROCK!

    Email me off line if you need more info...
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  43. #43
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    ok ...

    so you can dump the 650b's into a std 26" frame with a taller bb...can you use a 26er sus fork?

  44. #44
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    Quote Originally Posted by BThor
    ok ...

    so you can dump the 650b's into a std 26" frame with a taller bb...can you use a 26er sus fork?
    Chances are you can't do this with many other 26" bikes.... the Surly's are probably the best candidates because of their unique combination of frame design features.

    There may be some 26" forks that will work with the tires, but I haven't tried any yet except for an old Manitou "Black". My tires do not fit in this fork; it bottoms out on the arch. However Carl at Vicious Cycles has built 2 frames and he says the wheels just barely fit in the Fox forks he has there with about 6mm (.25") clearance all around. This is tighter than I'd like, but as long as the wheel doesn't bottom out on the crown under full compression it should be fine.

    The forks that will work with no problems are the White Brothers 650B forks I have here. These were designed specifically for my tires. They come in 80mm, 100mm and 130mm versions.

    Because of their lack of an arch, the other 26" forks that should work are either of the Maverick forks - with a travel reduction kit 50% as long as their 29'er kit. This should yield about 103mm travel in the SC32 and 134mm travel in the DUC 32.
    http://www.maverickbike.com/main/do/...s/productID/19

    Also the Cannondale Lefty and the USE S.U.B. forks should work pretty well too. I am not sure if you can modify the travel on these to accommodate a 650B wheel or not, but in any case the 29er versions would certainly work. As would any current 29er fork.
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  45. #45
    I don't huck.
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    Quote Originally Posted by Kirk Pacenti
    Chances are you can't do this with many other 26" bikes.... the Surly's are probably the best candidates because of their unique combination of frame design features.

    There may be some 26" forks that will work with the tires, but I haven't tried any yet except for an old Manitou "Black". My tires do not fit in this fork; it bottoms out on the arch. However Carl at Vicious Cycles has built 2 frames and he says the wheels just barely fit in the Fox forks he has there with about 6mm (.25") clearance all around. This is tighter than I'd like, but as long as the wheel doesn't bottom out on the crown under full compression it should be fine.

    The forks that will work with no problems are the White Brothers 650B forks I have here. These were designed specifically for my tires. They come in 80mm, 100mm and 130mm versions.

    Because of their lack of an arch, the other 26" forks that should work are either of the Maverick forks - with a travel reduction kit 50% as long as their 29'er kit. This should yield about 103mm travel in the SC32 and 134mm travel in the DUC 32.
    http://www.maverickbike.com/main/do/...s/productID/19

    Also the Cannondale Lefty and the USE S.U.B. forks should work pretty well too. I am not sure if you can modify the travel on these to accommodate a 650B wheel or not, but in any case the 29er versions would certainly work. As would any current 29er fork.
    You can easily modify the travel of a 140mm Lefty, not sure of the other models. Likely so.

  46. #46
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    Well I just got on the 29'er wagon 2 months ago, which I like very much even being 5'7" on a good day, and riding tight East Coast singletrack.
    So if this 650B thing takes off, I guess it'll be about 2017 before I get one.

  47. #47
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    Quote Originally Posted by Kirk Pacenti

    I just dropped these wheels in a Surly 1x1 and it's like the bike was made for these wheels!
    And naturally, this comes out about a week after I sold my 1x1 and disc brakes. Seriously.

    Dammit Kirk......

    Any pics of said beast?
    Last edited by long hazy daze; 09-10-2007 at 10:35 PM.

  48. #48
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    Quote Originally Posted by Kirk Pacenti
    If you can ride a 26er you can ride these. The beauty is that these wheels fit in standard 26" wheeled geometry designs with very few mods needed.

    I just dropped these wheels in a Surly 1x1 and it's like the bike was made for these wheels! (of course you have to use disk brakes because the canti studs are in the wrong place)
    The idea of using a 1x1 sounds good and all, as does being able to use geo similar to 26" bikes. But shouldn't the 650B get it's own special geo?

    I mean, if a 1x1 rides okay, what should we change and why for the geo numbers?

    Do my questions even make sense?

  49. #49
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    Quote Originally Posted by Kirk Pacenti
    I am doing all that I can to remain objective and not get too dogmatic about the 650B size.
    You an never get too much of the doctrine! Thou shalt let nothing stop you in your quest for ALL!

    *cough* Sorry, just had a Descendents moment there
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  50. #50
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    Quote Originally Posted by Wish I Were Riding
    The idea of using a 1x1 sounds good and all, as does being able to use geo similar to 26" bikes. But shouldn't the 650B get it's own special geo?

    I mean, if a 1x1 rides okay, what should we change and why for the geo numbers?

    Do my questions even make sense?
    You're absolutely right, but Kirk used the Surly as an example as a nice way to ease everyone into the idea of 650. So those boffins with 1x1's can give the idea a go without getting a dedicated frame yet.

    Kirk correct me if I'm wrong, but I'd be guessing you'd need more than about 20mm of clearance between the top of a 26" wheel and the stay crossbraces, correct, to fit a 650b in a 26" frame?

    Of course if you're not into fiddling around and if you're an early adopter, get the dedicated frame forks and wheels, and let a custom builder do their job on the geometry, which to be spot-on will be different to both 29er and 26er geo. Not by a massive amount though.
    No longer member of the bike industry nor society, so don't hassle me.

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