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650c to 700c Fork

Old 03-05-05, 04:44 PM
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glevii
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650c to 700c Fork

I'm currently looking at a frame that has a 700c rear wheel, but was originally designed for a 650c front wheel. The frame has a 700c fork on it now. It's new and never been built up. Would the handling be affected in any way adversely because of the longer fork on the frame??
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Old 03-05-05, 05:28 PM
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Al1943
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Yes, the longer fork will effect the bike's trail. I would not buy it without doing some extensive riding to test the handling. Changing the fork length is like changing the head tube angle, some of this change could be offset with a different rake. But experimenting with different forks would could get very expensive. There is plenty of on-line info about bicycle geometry, rake, and trail.

Al
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Old 03-05-05, 05:42 PM
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glevii
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Thanks, that's what I figured. It's a frame on ebay, and I did enough research on it to find out that stock it's 650c in the front and 700c in the rear. The seller has a 700c fork on the front right now. For the price it's worth the money, though for the frame. Just wondering if a new 650c fork would be needed. Probably safer than sorry.
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Old 03-06-05, 05:42 AM
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MichaelW
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Unless you really NEED a 650 front wheel it is more practiical to use identical wheel size. There was a fashion for low-profiile time trial frames a while back, using low front ends. This is different to using 650c because you are a small rider.
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