RaceMax fenders are compatible with 650b and small 700c tires with no or little profile, which allow for a clearance between fender blade and the tire of at least 10-15mm as per the requirement from SKS.

The rear fender covers very wide tires so it can slightly interfere with bulky electronic front derailleurs. This restricts the size of tire you can use together with the fender and such front derailleurs, so please always ensure you have enough clearance post-assembly.