Bicycle Mechanics - Another 27" wheel question.

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Bikedud
12-29-02, 07:12 PM
Can you use 700c wheels with a frame made for 27" wheels if you use long reach brakes?
Thanks,

Blake

pokey
12-29-02, 07:15 PM
No problem.
D*Alex
12-30-02, 05:57 AM
Not always.

RainmanP
12-30-02, 06:13 AM
If the existing brakes are OK, try it with them first. You may have enough vertical pad adjustment since you only need about 4 mm.
Feldman
12-31-02, 03:59 PM
You'll actually need 6mm reach; and it depends on the brake calipers. It might be a place to use older, long centerpull calipers upgraded with modern pads and cables.
John E
12-31-02, 06:07 PM
Originally posted by Feldman
You'll actually need 6mm reach; .

???
700C = 622mm rim diameter
27" = 630mm rim diameter
(630-622)/2 = 4mm difference in rim radius

Since lengthening the brake reach will reduce the braking leverage, I agree that KoolStop pads are a must!
pokey
12-31-02, 06:40 PM
Originally posted by John E


???
700C = 622mm rim diameter
27" = 630mm rim diameter
(630-622)/2 = 4mm difference in rim radius

Since lengthening the brake reach will reduce the braking leverage, I agree that KoolStop pads are a must! Yeah,I actually checked one once myself,and 4mm was about it.If what you got doesn't work,the it's time for plan 'B'.