Bicycle Mechanics - Schwinn 70's Varsity wheel question.
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08-02-10, 08:31 PM
I am trying to rebuild (not restore) a 70's schwinn varsity frame into a single speed bike. I was going to use an old 700c track wheelset on the bike for starters. To my dismay, the axle on the wheelset has a wider diameter and will not fit into the frame's dropouts. If anyone has done this conversion before, I was was wondering what were the solutions around this problem. I was thinking of maybe taking the axles from the schwinn wheelset and transplanting into the track wheelset. Or, I could also cut the dropouts on the bike to make them wider (But, I really don't want to do that). This is my first conversion, so any info/advice would be much appreciated. Thanks :)
The easy fix is a file. You have two choices.
You can file flats on both sides of the axles (like an oval track) so they fit the dropouts, or file the dropouts so they fit the axle. Note that it's important to maintain symmetry especially on the fork, so file from one side only preserving the other as a good reference.
On forks, don't file the top of the slot unless you're doing it by design to center the wheel at the top of the fork. On rear dropouts, widen them by filing the bottom surface, leaving the top edge unchanged (again unless you need to change how wheels fit).
08-02-10, 09:34 PM
I've switched front axles on a couple wheelsets before. On one I had to widen the hole in the dust cover to fit the cone.
Never thought about filling flat spots on the axle.
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