Magura MDR-P Disc Rotor203mm Magura&';s heavy-duty two-piece rotor, built for long descents and hard braking. The 203mm size is what you want on the front of an enduro or e-bike, where heat management stops being optional. Diameter 203mm Mount 6-Bolt Build Two-Piece Best For EnduroE-Bike Details Two-piece construction - a steel braking surface on an alloy carrier. Sheds heat faster and stays flatter than a one-piece rotor under sustained braking. 203mm diameter - more leverage and more surface area. The single biggest upgrade for riders who cook brakes on long descents. Standard 6-bolt mount - fits any 6-bolt hub. Sold individually. Before You Order Going up in rotor size needs a caliper adapter. If you are moving from 180 to 203, you need the right mount or the caliper will not line up. Check frame and fork clearance before going to 203mm, especially on the rear. Bed in new rotors and pads together before you need them. Not sure what adapter you need? Bring the bike in and our service department will sort it. Installation available in-store - Gravity Coalition, Midway & Heber