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  1. #1
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    25.4 size handlebars with 31.8 size stem

    anyone running this? if so, how did you do it? shim or something Do It Yourself?? i used to use electric tape but i stopped so i need help lol

  2. #2
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    beer can.

  3. #3
    Veteran Racer TejanoTrackie's Avatar
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    Yes. I use these shims and they work great. Scroll down the page to handlebar shims, second item.

    http://www.worldclasscycles.com/Trac...nents_cart.htm

    I have these on my Bianchi Pista Concept which I have raced seriously for 3 years. Sprints, standing starts, you name it. No slippage like ever. The secret is that the shims are solid aluminum pieces that fit perfectly. Forget about PVC, beer cans, electrical tape....don't work, but these do. And I'm not the only serious trackie that uses them. The only thing, they are meant for aluminum bars and stems only. Also, I only use stems with 4-bolt clamps, and use a torque wrench to tighten them.
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    Last edited by TejanoTrackie; 10-16-09 at 08:39 PM.

  4. #4
    FNG destikon's Avatar
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    Go for the gold. Do it right with a new stem. I considered this to because I want to do the exact same thing but I think it's to much to shim.
    Quote Originally Posted by powers2b View Post
    time's up

  5. #5
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    Quote Originally Posted by destikon View Post
    Go for the gold. Do it right with a new stem. I considered this to because I want to do the exact same thing but I think it's to much to shim.
    +1 You will find yourself in a better place in the long run. Either that or get new bars. And so you know, the shim you need is huge, relatively speaking.

  6. #6
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    you guys know of any good cheap 1 1/8 (25.4) POLISHED silver stem?? i like my specialized one right now but its 31.8 clamp size = (

  7. #7
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    i have one from dimmension thats 26.0, but it tightens enough for 25.4. origin8 makes one that is 26 also
    http://www.origin-8.com/product_deta...+Pro&cl1=STEMS

  8. #8
    cab horn
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    I can't believe you people would actually suggest shimming down 6mm+ worth of bar diameter. I'm surprised people aren't doing left/right/center from this forums ridiculously bad advice all the time.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  9. #9
    n00b feetpower's Avatar
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    i dont even know why they make 26 to 31.8 shims. waaaaaay too big. do yourself a favor and get parts that fit. isnt 25.4 = 1"?

    check out your LBS and ask for a spare parts bin or something. since you're in so-cal, try checking out open road bicycles in pasadena, ca. awesome place. bought an RC 1" threadless 120 mm 26mm stem and nitto 25.4 to 26 shim for $ 25. they have A LOT of used parts

  10. #10
    Veteran Mother****er Scrodzilla's Avatar
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    http://www.velo-orange.com/vost17ri.html

    The link is to a 17 degree stem but they have a 6 degree as well in a bunch of different lengths. They're 1/8" x 26mm but my 25.4 bars work without incident.
    Last edited by Scrodzilla; 10-16-09 at 05:35 AM.

  11. #11
    Beefcake the Mighty rdubbz's Avatar
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    I've had a 26-31.8 shim on a bike for while now. no issues.

  12. #12
    chickenosaurus j3ffr3y's Avatar
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    I've done it, ended up getting a new stem, but did it for a few months, a pvc pipe for a shim no issues
    2010 Motobecane Team Track
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  13. #13
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    sounds crazy....

    im running 25.4 bars & 26.0 stem w/ 3x coke can shim no problem however.... wouldn't wanna do anything larger

  14. #14
    jpdesjar
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    I wouldn't feel comfortable making a shim that large for handlebars.
    Sketchy

  15. #15
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    really you guys think this would be sketchy? I was planning on going 25.4 to 31.8 with this little guy

    http://www.benscycle.net/index.php?m...oducts_id=6338

    there are just a lot more cost efficient options for 31.8 stems is why I'm doing it.

  16. #16
    Team Beer Cynikal's Avatar
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    For anyone trying this, I have a better solution. I have several 25.4 stem and I need a 31.8. Let's do a trade. PM me.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  17. #17
    jpdesjar
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    Hmmm...perhaps it's not sketchy after all.
    I was wary of the beer can suggestion though for sure.

  18. #18
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    25.4 to 31.8 - goes on ok but it a little bit of a b*tch to line up. Will see how it works


  19. #19
    Senior Member
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    Quote Originally Posted by muffdoc View Post
    beer can.
    seriously dude? you're gonna need to drink a lot of beer to make up the space there.
    1988 Miele Azsora

  20. #20
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    Quote Originally Posted by operator View Post
    I can't believe you people would actually suggest shimming down 6mm+ worth of bar diameter. I'm surprised people aren't doing left/right/center from this forums ridiculously bad advice all the time.
    Please explain the physics of why you think this would be a problem with the proper 25.4/31.8 shim. Or is your objection based purely on aesthetics?

  21. #21
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by MnHPVA Guy View Post
    Please explain the physics of why you think this would be a problem with the proper 25.4/31.8 shim. Or is your objection based purely on aesthetics?
    Actually, I think it looks kinda cool, and it definitely works when done properly.
    Attached Images Attached Images

  22. #22
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    I'm actually trying to do the opposite. I'm trying to put a 31.8 on a 26.0 stem. Its 6mm difference, would it work if I mount it or would you guys suggest me not to?

    I don't have a 31.8 yet which is why I'm asking the question before I buy

  23. #23
    jpdesjar
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    31.8 bar in a 26.0 stem?
    Umm...I want to say bad idea

  24. #24
    Packfodding 3 caloso's Avatar
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    I got a shim for 31.8 -->> 26.0 from my good friends at the Bike Biz. I believe it's made by Problem Solvers. It works. Looks ugly but it works.

    If you do a soda can shim, I hope you have your dentist on retainer. And on speed dial.
    Cyclists of the world, unite! You have nothing to lube but your chains!

  25. #25
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    Quote Originally Posted by caloso View Post
    I got a shim for 31.8 -->> 26.0 from my good friends at the Bike Biz. I believe it's made by Problem Solvers. It works. Looks ugly but it works.

    If you do a soda can shim, I hope you have your dentist on retainer. And on speed dial.
    Could you show me this item from problem solvers or if you have any pictures?

    Quote Originally Posted by jpdesjar View Post
    31.8 bar in a 26.0 stem?
    Umm...I want to say bad idea
    I understand what you're saying but I want to see if anybody have/had done it.

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