Magura QM 46 adapter PM 203-220

Magura QM 46 adapter (PM 203 → 220)

QM 46 – Original Magura adapter to adapt the Post Mount (PM) 203 mm caliper to a 220 mm brake disc. The perfect solution when you want more braking torque and better thermal control without changing calipers.

Why choose

• Quick upgrade: from 203 mm to 220 mm disc with one adapter.
• OEM precision: Magura quality – correct spacing and hardness.
• More power: 220 mm rotor = shorter stopping distance, better modulation.
• Wide range of applications: MTB, E-MTB, S-Pedelec, city bikes, e-moto conversions.

Compatibility

• Attaching the clamp: Post Mount (PM) 203 mm → 220 mm
• Rotor: Ø 220 mm (e.g. Magura MDR-P/MDR-C 220)
• Location: usually front brake (depends on frame/branch specifications)

Specifications

• Model: Magura QM 46
• Material: machined, hardened alloy (high rigidity)
• Fixing type: PM to PM (up to 220 mm)
• Compatibility with Magura and other PM-compatible calipers

What’s included

• 1× adapter QM 46
• 2× screws M6×30

Installation tips

• Check that the fork/frame allows a 220 mm rotor.
• Use medium-strength threadlocker ; tighten according to Nm recommendations.
• After installation, centre the support and follow the bed-in procedure.

FAQ

Will it fit an IS (6-bolt) hub?
The hub mounting is irrelevant here – the adapter changes the spindle distance in the PM standard. The rotor mounting can be 6-bolt or Center Lock (use the appropriate lockring/adapter).

Can I use it with any 220 mm disc?
Yes, if it is compatible with your support