Originally Posted by
alaskanb3arcub
The reason the rack is labeled disc mount is because it is designed to go on a disk fork, which has a different spread from V or caliper brakes.
wrong
Originally Posted by
xenologer
disk brakes usually get in the way of traditional rack mounts. so 'disk racks' typically have legs that arch out to clear the brake .
correct
unclejemima: what bike do you have? Many bikes have their rear caliper mounted on the seatstay like this:
Because the caliper sticks out,you usually need a disc-specific rack that will mount around it. Note,many hydraulic calipers tuck in far enough to clear a rack.
Nowadays,many bikes come with the caliper mounted to the chainstay like this:
On these,the caliper is out of the way and standard racks will work.
Here's some links to some companies that make disc-specific(and standard) racks:
Topeak® Cycling Accessories ? Products - Racks
Racks « Products « Axiom Performance Gear
Racks