Racing Bike Wheel Size Guide. Wheels are the first port of call if you are looking to upgrade your bike to either make it lighter or to handle better for a better riding experience. If you re a much shorter person your racing bike frame might not be able to comfortably accommodate 700c wheels.
In a nutshell. The rim spokes and hub. View our buying guides.
Our guide to buying.
However on a mountain bike the answer is yes. Switching from 630 to 622 for example needs another 4mm of brake reach. Although they re familiar they can be. Our guide will talk you.