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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 01-16-05, 07:26 PM   #1
zoeglassjd
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quick question- quick answer(?)- re:wheels

so, here's the question-

I am doing a conversion. What is the difference between putting 700 c wheels or 27" wheels? is it simply about brake adjustment? what about chainline. thanks for the help...

zgjd
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Old 01-16-05, 07:32 PM   #2
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the difference is 8mm of diameter,
if your frame is a 27 inch, your brakes have to be able to adjust ~4mm further towards the wheel center. if your brakes have enough reach, there is should be no problems.
also you gain a bit of frame clearance for fenders etc.
chainline would be the same as long as the hubs were the same width
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Old 01-16-05, 07:35 PM   #3
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yeah- its a 80's puch. made for 27" frame. so, you would say no rear brake, no problem??

anyone else? any reason you wouldn't use 700 c??
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Old 01-16-05, 07:37 PM   #4
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Quote:
Originally Posted by zoeglassjd
so, here's the question-

I am doing a conversion. What is the difference between putting 700 c wheels or 27" wheels? is it simply about brake adjustment? what about chainline. thanks for the help...

zgjd
I would add that if you do this conversion, you need to watch your brake pads as they wear. I had good brake alignment to start, but as they wore down they actually rubbed against the tire. This is because they meet the rim at a more severe angle. Needless to say I was lucky that I was signifcantly slowed before the front tire popped.
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Old 01-16-05, 07:41 PM   #5
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Quote:
Originally Posted by zoeglassjd
yeah- its a 80's puch. made for 27" frame. so, you would say no rear brake, no problem??

anyone else? any reason you wouldn't use 700 c??
well, no rear brake no problem in the rear,
if your planing on running a front brake, you need to make sure it'll reach.
if it won't, you can always pick up a long reach caliper, they don't look as sleek as the better dual pivots but they'll do the job.
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Old 01-16-05, 07:45 PM   #6
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ok- one more then- what happens if i switch out the rear and not the front? wierd?? or not much of a difference /

oh, and what if i use a 20" bmx wheel (kidding)

thanks for the help

Last edited by zoeglassjd; 01-16-05 at 07:51 PM.
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Old 01-16-05, 07:59 PM   #7
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well,
those 4mm can be compensated for by tire choice.
really, if its posible for you to get your hands on a 700c wheel and put it on your frame to try out.
personally i don't notice much of a difference. one of my friends bike has a 700 rear wheel, i rode it for a weekend and it didn't matter to me.
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