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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 10-15-09, 09:09 PM   #1
mikeee
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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
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Old 10-15-09, 09:15 PM   #2
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beer can.
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Old 10-15-09, 09:42 PM   #3
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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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Old 10-15-09, 09:47 PM   #4
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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.
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Old 10-16-09, 12:13 AM   #5
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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.
+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.
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Old 10-16-09, 12:27 AM   #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 = (
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Old 10-16-09, 12:37 AM   #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
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Old 10-16-09, 01:00 AM   #8
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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.
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Old 10-16-09, 03:04 AM   #9
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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
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Old 10-16-09, 05:30 AM   #10
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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.
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Old 10-16-09, 06:17 AM   #11
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I've had a 26-31.8 shim on a bike for while now. no issues.
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Old 10-16-09, 06:20 AM   #12
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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
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Old 10-16-09, 06:47 AM   #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
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Old 10-16-09, 07:47 AM   #14
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I wouldn't feel comfortable making a shim that large for handlebars.
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Old 10-19-09, 12:57 PM   #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.
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Old 10-19-09, 12:59 PM   #16
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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.
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Old 10-19-09, 01:06 PM   #17
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Hmmm...perhaps it's not sketchy after all.
I was wary of the beer can suggestion though for sure.
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Old 10-26-09, 05:09 PM   #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

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Old 10-26-09, 05:39 PM   #19
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beer can.
seriously dude? you're gonna need to drink a lot of beer to make up the space there.
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Old 10-28-09, 09:36 PM   #20
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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.
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?
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Old 10-29-09, 08:13 AM   #21
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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.
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Old 10-29-09, 01:19 PM   #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
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Old 10-29-09, 01:25 PM   #23
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31.8 bar in a 26.0 stem?
Umm...I want to say bad idea
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Old 10-29-09, 01:29 PM   #24
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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.
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Old 10-29-09, 02:10 PM   #25
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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.
Could you show me this item from problem solvers or if you have any pictures?

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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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