The factory rear discs on a JCW are small single-piece units that fade quickly when you lean on them. The MMX Performance 2-Piece 325mm Rear Rotor Conversion steps them up to a larger floating rotor and moves the OEM caliper outboard to suit, giving the rear axle real thermal capacity.
It bolts on with your factory rear calipers, and the red anodized carrier brackets look right behind open-spoke wheels.
MINI JCW Rear Rotor Conversion Details
The 325 x 10mm high-carbon iron ring carries directional grooves and floats on a CNC-machined 6061-T6 aluminum hat. The included JCW-red caliper carrier brackets relocate the OEM caliper for the larger disc. Pair it with the MMX 335mm front rotor set (MMR31-1410F) for a balanced setup.
What's Included
- 1 x pair of 2-piece floating rear rotors, left and right directional (325 x 10mm)
- 2 x rear caliper carrier brackets, JCW-red anodized
- Floating bobbins, pre-assembled
- All required fitting hardware
Brake pads not included.
Key Features
- 325mm x 10mm 2-piece floating rotors
- Carrier brackets relocate the OEM rear caliper outboard
- High-carbon iron ring with directional grooves
- CNC-machined 6061-T6 aluminum center hat
- Part number: MMR31-1411R
Vehicle Fitment
Fits MINI F-Series John Cooper Works models:
- MINI F55 / F56 / F57 John Cooper Works (2015-2024)
Installation Notes
Rotors are directional, left and right. Professional installation is recommended. Check wheel clearance for the larger disc.
- Remove the rear calipers, carriers and OEM rotors.
- Install the MMX carrier brackets and directional rotors.
- Mount the OEM calipers with fresh pads and torque to MINI specification.
- Bed in the pads before hard use.
