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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 04-11-06, 04:36 PM   #1
Learn_not2burn
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Overtightened Stem w/ Deda Pistas

I had a squeeking coming from my front end (turned out to be a spacer jumpin' around), so I took everything apart. When I removed my Deda Pista bars from my stem, I realized that the back side of the handlebars is slightly deformed from the stem. I don't run my stem paul bunyun/chuck norris/andre the giant tight, just enough to not allow my bars to swing down when I put all my weight on them. Any one else have this problem? I am concerned because they are aluminum bars and I don't want them breaking on me. I'll try to put up pictures tonight.

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Old 04-11-06, 04:42 PM   #2
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What kind of stem are you running? Matching Deda Pista stem or?
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Old 04-11-06, 04:53 PM   #3
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25.4 stem m/ 26.0 bars?
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Old 04-11-06, 04:54 PM   #4
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Nah, I'm using a felt stem.
Is the face on the Deda stem wider?
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Old 04-11-06, 04:55 PM   #5
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mix match= bad!
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Old 04-11-06, 04:55 PM   #6
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Isn't the Deda pist OS...like 31.8?
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Old 04-11-06, 04:57 PM   #7
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yeah, it is, 31.7 from the business cycles webpage, as well as world class cycles, but I've seen 31.8 quoted elsewhere as well (Edit: Felt's website says its 31.8.)
MY felt stem is oversized, and by coincidence is the exaxt stem that they spec with the TK-2, with the deda pista bars.

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Old 04-11-06, 05:39 PM   #8
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A guy I ride with used a Deda stem and the steal Deda bars. When he swapped out his stem, the bars were dented in. I guess it happens. He is still riding the bars and they seem to be fine. I ride the aluminum Deda bars and have had no problems yet.
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Old 04-11-06, 05:41 PM   #9
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yeah, i have deda pistas with an itm millenium stem. no problems at all.
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Old 04-11-06, 05:41 PM   #10
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yeah, wtf is up w/ 31.7 vs. 31.8? I always assume that's a typo but are there really 2 different standards that differ by .1mm? That just seems like the worst possible idea.
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Old 04-11-06, 06:15 PM   #11
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I haven't noticed any issue with my deda pista stem and bars - site lists them at 31.7 each. Perhaps the Felt stem has a narrower diameter than whats listed?
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Old 04-11-06, 10:12 PM   #12
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Quote:
Originally Posted by Spor
yeah, wtf is up w/ 31.7 vs. 31.8? I always assume that's a typo but are there really 2 different standards that differ by .1mm? That just seems like the worst possible idea.
31.7 and 31.8 are the exact same thing with two different names
they're really 1.25"

1.25" = 31.75mm. so one manufacturer rounds up to 31.8, another rounds down.
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