I have a '99 Boxxer (6" travel, 20mm axle) that I want to put my regular XT disc brakes on (came as standard XC brakes - 6" rotors, etc.). Looks like the 6"won't quite work, so what size do I need to put on? I don't want to bother with extra adaptors or anything, I don't need unreal stopping power (I'm not that aggressive), so I'd just like to get by with putting a rotor on. Anyone know the size I need? Thanks alot in advance.