Went riding through some rugged terrain last week. Roots, Branches,Rocks, Mud, you name it, and the Devol Rear Disc Guard on my '05 RM-250 kept my rotor damage free...The Rear Axle actually goes through the Disc Guard creating a solid fit. Don't have to worry about any small tabs breaking on the Caliper as with other Brands of Rear Disc Guards. Great Product !!!