Magura QM40 Adapter PM 160–180

What Is It?

The Magura QM40 is a post-mount (PM) disc brake adapter designed to increase the rotor size from 160mm to 180mm. It allows a compatible Magura brake caliper to be positioned correctly when upgrading to a larger brake rotor, helping maintain effective braking performance.

Key Features

• Rotor compatibility: Designed for a 160mm to 180mm rotor size conversion.

• Post-mount design: For compatible post-mount disc brake setups.

• Secure caliper positioning: Helps align the brake caliper with the larger rotor.

• Durable construction: Built for reliable use in mountain biking and other compatible cycling applications.

Specifications

• Brand: Magura

• Model: QM40

• Type: Post-mount to post-mount disc brake adapter

• Rotor size conversion: 160mm to 180mm (front fork)

• Other compatible configurations: PM 140mm to 160mm rear; PM 200mm to 220mm

• Weight: Approximately 39g

• Manufacturer part number: 2700515

• Material: Aluminium adapter with mounting hardware depending on package contents.

Benefits

• Supports upgrading to a larger brake rotor for increased braking leverage.

• Provides correct caliper positioning for compatible post-mount setups.

• Offers a lightweight solution for brake system upgrades.

Best Suited For

Mountain bikers and bicycle mechanics upgrading compatible Magura disc brake systems from a 160mm to a 180mm front rotor. Always confirm fork or frame compatibility and the manufacturer's maximum permitted rotor size before installation.