Magura Disc Brake Adaptor - QM45

Name: Magura Disc Brake Adaptor - QM45
Brand: Magura
SKU: r75zxe7q4h
Availability: InStock

The Magura QM45 disc brake adaptor is designed to allow for precise adjustment of your brake calip...

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Magura Black Disc Brake Adaptor - / Qm45 / 180 - 220Mm Post Front Or 140 - 180Mm Post Rear

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Merlin CyclesMagura Black Disc Brake Adaptor - / Qm45 / 180 - 220Mm Post Front Or 140 - 180Mm Post Rear

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Product Information

Full details

The Magura QM45 disc brake adaptor is an essential component for cyclists looking to upgrade their rotor size for enhanced stopping power. Designed specifically for Magura braking systems, it allows for a seamless transition from smaller post mounts to larger rotors, making it ideal for aggressive trail riding or heavy-duty use. While it provides a secure and precise fit for both front and rear configurations, users should verify their bike frame and fork compatibility with 220mm or 180mm rotor standards before installation to avoid clearance issues.

All features

Series	QM45
Model Part Number	2701940
Brand	Magura

Extended Product Information

FAQs

Can I use the QM45 with non-Magura brake calipers?

The QM45 is optimized for Magura systems. While it may fit other brands, we recommend using it with Magura calipers to ensure exact spacing and safety.

Does this adaptor include mounting bolts?

The product package typically includes the adaptor; please check your specific purchase documentation, as mounting bolt requirements can vary by fork or frame type.

Will this fit a 160mm post mount?

The QM45 is specifically designed for 180mm (front) and 140mm (rear) post mounts. It is not intended for use with 160mm mounts.

Is the adaptor reversible for front and rear use?

No, the adaptor is designed for specific size transitions. You must use it according to the front (180 to 220mm) or rear (140 to 180mm) specifications.

What is the primary material of the adaptor?

The QM45 is constructed from high-strength aluminum, providing a lightweight yet rigid structure for brake stability.

Troubleshooting

Brake pads are rubbing against the rotor after installation

Loosen the caliper bolts, squeeze the brake lever firmly to center the caliper over the rotor, and retighten the bolts to the specified torque.

Increased noise or vibration when braking

Check that the adaptor is flush against the post mount and verify that all mounting bolts are tightened securely.

Pros and Cons

Pros

Ensures precise caliper positioning for maximum brake contact
High-quality Magura manufacturing guarantees reliability
Versatile design supports both front and rear brake upgrades
Simple, one-piece construction for easy installation

Cons

Compatibility limited primarily to Magura-standard braking systems
Requires specific fork and frame clearances for larger rotors
Hardware for rotor changes may need to be sourced separately

Setup, Compatibility & Care

To install the QM45, ensure your bike's post mount is compatible with the intended rotor size. When installing, use a torque wrench to tighten the caliper mounting bolts to the manufacturer's specified values to prevent stripping or misalignment. It is recommended to check the alignment of the pads relative to the rotor after installation to ensure there is no rubbing. Periodically clean the adaptor and bolts to remove debris or salt build-up, and inspect them for any signs of fatigue during your regular bike service interval.