Magura DISC BRAKE MOUNT
DISC BRAKE MOUNT
DISC BRAKE MOUNT
DISC BRAKE MOUNT
DISC BRAKE MOUNT
Magura

Magura DISC BRAKE MOUNT

$7.00
In Stock

Precision Magura disc brake mount adapters to convert IS/Post mounts and fit 160–203mm rotors. Lightweight, CNC-machined construction for reliable brake alignment.

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Available Options

Option Price Availability
Magura, QM9 - Rear IS to 203mm 203mm Rotor w/ Rear IS Mount $18.00 In Stock
Magura, QM12 - Front IS to 180mm or Rear IS to 160mm $18.00 In Stock
Magura, QM40 - Front Post to 180mm for 2 or 4 Piston Calipers $18.00 In Stock
Magura, QM41 - Rear IS to 180mm for 2 or 4 Piston Calipers $7.00 In Stock
Magura, QM42 - Front Post to 203mm for 2 or 4 Piston Calipers $7.00 In Stock
Magura, QM43 - Front IS 6" to 160mm or IS 8" to 203mm for 2 or 4 Piston Calipers $18.00 In Stock
Magura, Disc Brake Mount Adapter, Caliper: Post mount, Frame/Fork: Post mount, 203mm, QM44 $18.00 In Stock
Magura, Disc Brake Mount Adapter, Caliper: Post mount, Frame/Fork: Post mount, 220mm, QM45 $18.00 In Stock
Magura, Disc Brake Mount Adapter, Caliper: Flat mount, Frame/Fork: Flat mount, F160/F140, QM50 $21.00 In Stock
Magura, Disc Brake Mount Adapter, Caliper: Flat mount, Frame/Fork: Flat mount, R160, QM51 $35.00 In Stock
Magura, DISC BRAKE MOUNT, Disc Brake Adaptor, Caliper: Flat mount, Frame/Fork: Flat mount, F180/F160 $35.00 In Stock

Product Details

Overview & Technology

Magura disc brake mounts are purpose-built adapters that let you convert between International Standard (IS) frame/fork mounts and Post mount calipers or change rotor sizes cleanly and reliably. Machined to tight tolerances, these adapters ensure consistent caliper alignment and predictable pad-to-rotor clearance so braking performance is maintained when you upsize rotors or swap calipers. Construction matters: Magura adapters are engineered from durable materials and finished to resist corrosion, delivering the stiffness required to keep 2- and 4-piston calipers correctly positioned under load. The compact, lightweight design (shipping weight ~0.12 lb) minimizes added mass while giving you the rotor clearance you need for aggressive riding or heat management on long descents.

Key Features & Benefits

Clear, functional features: These adapters are available in multiple configurations to cover common rotor and caliper combinations—IS-to-203mm, IS-to-180mm/160mm, and Post-to-180mm/203mm for both 2- and 4-piston calipers. Each variant is sized to place your caliper at the correct centerline for the chosen rotor diameter, eliminating guesswork when upgrading rotors or swapping frames and forks. • Precision fit: CNC-machined mating faces for dependable alignment. • Material & finish: High-strength aluminum or steel construction with corrosion-resistant coating. • Lightweight: Adds minimal weight—ideal for cross-country uphills or bikepacking. • Versatile sizing: Supports 160–203mm rotors and both post and IS mounts for broad compatibility.

Fit, Compatibility & Installation

These Magura adapters are designed for IS (International Standard) frame or fork mounts and Post mount calipers depending on the variant. Hardware is not included—use your bike manufacturer's or Magura's recommended bolts and torque specs. Verify rotor diameter and caliper type before ordering: available variants include QM9 (Rear IS to 203mm), QM12 (Front IS to 180mm / Rear IS to 160mm), QM40 (Front Post to 180mm for 2/4-piston), QM41 (Rear IS to 180mm for 2/4-piston), and QM42 (Front Post to 203mm for 2/4-piston). Installation tips: Clean mounting faces, apply correct threadlocker or anti-seize as recommended, and torque bolts to manufacturer specs. After mounting, center the caliper using pad-attract or by loosening bolts, squeezing the brake lever, and tightening—then check rotor spin and pad clearance before riding.

Who It's For

This adapter line is aimed at mountain riders who modify brake setups—mechanics upgrading to larger rotors for better heat dissipation, riders swapping caliper styles between frames and forks, and trail/enduro riders who want proven alignment when using 2- or 4-piston Magura calipers. It's also handy for bike shops and home mechanics doing rebuilds or custom rotor setups. If you plan to increase rotor size for more stopping power on long descents, or if you're fitting a new caliper to a frame with a different mount standard, these Magura mounts give a reliable, lightweight solution that preserves braking performance.

Key Features

  • ✓ Precision CNC-machined adapters for accurate caliper alignment
  • ✓ Compatible with 160mm, 180mm and 203mm rotor sizes
  • ✓ Variants for IS-to-Post and IS-to-IS mount conversions
  • ✓ Durable aluminum/steel construction with corrosion-resistant finish
  • ✓ No hardware included—use Magura or manufacturer-specified bolts
  • ✓ Lightweight profile adds minimal mass (approx. 0.12 lb shipping weight)
  • ✓ Fits 2- and 4-piston Magura calipers depending on variant

Specifications

Caliper mount Post mount
Frame/Fork mount IS
Hardware No
Rotor in mm R203

Product Identifiers

Vendor Item # 0722325
EAN 4055184003947

Frequently Asked Questions

Which adapter do I need for a 203mm rotor on a frame with an IS mount?

Choose the QM9 variant (Rear IS to 203mm) or a QM42 for Front Post to 203mm depending on whether your caliper mount is IS or Post. Verify whether your frame/fork is IS and whether the caliper is Post or IS before ordering.

Does this adapter come with mounting bolts or hardware?

No. Magura disc brake mounts are sold without hardware. Use the correct-length bolts and torque spec recommended by Magura or your frame/fork manufacturer to ensure safe installation.

Will installing a larger rotor affect my brake performance?

Upsizing rotors improves heat capacity and stopping power under load but requires correct adapter placement and sometimes longer hose/cable lengths. After installation, bed in the pads and check for consistent caliper alignment to avoid uneven wear or noise.

Are these adapters compatible with non-Magura calipers?

They're designed around Magura's mounting standards and tested for Magura calipers, but the physical IS/Post dimensions are industry standard. Confirm bolt pattern and caliper centerline compatibility before using with other brands.

Can I use the same adapter front and rear?

Some variants are specific to front or rear applications (e.g., QM9 is rear IS to 203mm). While the mechanical fit may be similar, follow the variant designations—front forks and rear mounts can have different spacing, clearance and load requirements.

How should I center the caliper after installing the adapter?

Loosen the caliper mounting bolts slightly, squeeze the brake lever to center the caliper over the rotor, then tighten bolts to the manufacturer's torque spec while holding the lever. Spin the wheel to confirm no rotor rub and fine-tune as needed.

Buying Guide

When buying a disc brake mount adapter, start by identifying the mount types on your frame/fork (IS or Post) and the caliper, then pick the adapter that matches your target rotor diameter. Consider whether you need a front or rear-specific adapter and whether your caliper is a 2- or 4-piston unit—many adapters are coded for piston count to ensure correct clearance. Also plan for hardware: adapters are often sold without bolts, so add compatible-grade fasteners and check for required caliper/hose adjustments. If you're upgrading for increased stopping power on long descents, pair the adapter with heat-rated rotors and fresh pads for best results.

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