Alongo
Guru
I have just bought a spare set of wheels to use on the road for my gravel bike. The bike has Shimano GRX brakes with 160 mm rotors , the new wheels have 140 mm rotors . What I am hoping to do is use the 160 rotors on the front and the 140 rotors on the rear. By doing this I only have to adapt the rear Caliper and both wheels will be a straight swap. See pic , do I just need to take out the adaptor plate and bolt Caliper to the frame - will the bolts be too long and need shorter ones or will the same bolts be ok. New to disc brakes so thanks for any help.