Best current price£6.50from Merlin Cycles
Shopping.co.uk recommended and popular offers
Merlin Cycles£6.50Visit shop Magura Black Disc Brake Adaptor - / Qm42 / 203Mm Post
Visit shop
eBay£9.57Visit shop MAGURA QM 42 adapter, PM 160-203
Visit shop5 offers from £6.50 - £16.49
View price history by clicking the chart icon.
The Magura QM42 Disc Brake Adaptor is designed for mountain bike enthusiasts and mechanics looking to upgrade their stopping power by mounting 203mm rotors to 6-inch post mount forks. This high-quality, durable component ensures precise caliper alignment for reliable braking performance; however, users must verify that their specific fork or frame model supports a 203mm rotor clearance before installation.
| Series | QM42 |
|---|---|
| Model Part Number | 2700517 |
| Brand | Magura |
The QM42 is designed for Magura post mount systems; compatibility with other brands depends on their adherence to standard post mount spacing.
No, this adapter is specifically geometry-optimized for a 203mm rotor on 6-inch mounts.
It is compatible with both front and rear 6-inch post mount configurations.
The QM42 serves as the official replacement for the previous QM 7 adapter.
The Magura QM42 weighs approximately 34 grams.
Ensure the adapter is mounted flush against the fork/frame tabs and check that the caliper is properly centered and tightened.
Check that you are using the correct length bolts and consider applying a light amount of thread-locking compound to the threads.
Installation requires a standard hex key set and a torque wrench to ensure the mounting bolts are tightened to the manufacturer's recommended specifications.
Regular maintenance involves checking bolt tightness periodically, especially after aggressive riding. If the adapter surface shows signs of damage or extreme wear, it should be replaced to maintain safety.
