Magura MDR-S 2.5 Heavy Duty Disc Rotor

Quiet Power and Unrivalled Consistency: The Magura MDR-S Rotor

The Magura MDR-S 2.5 is not your standard mountain bike brake disc. While traditional high-performance rotors hover around 1.8mm to 2.0mm thick, Magura has overbuilt the MDR-S to a staggering 2.5mm profile. This massive increase in steel mass allows the rotor to act as a highly effective heat sink, heating up significantly more slowly on long downhill runs and keeping your pads working perfectly in their optimal temperature "sweet spot".

The increased rigidity of the 2.5mm martensitic chrome steel structure virtually eliminates the annoying brake howl and high-frequency arm-pump vibrations common on lighter, flimsier discs. To maintain standard wheel alignment and prevent frame compatibility issues, the rotor features a clever built-in hub offset, shifting the braking track perfectly into the centre of the Gustav calliper. Because it is highly resistant to warping under severe heat expansion, it provides a incredibly consistent, rock-solid lever bite point from the top of the track to the bottom.

Vital System Guide: Fitting and Bedding In

Because the MDR-S 2.5 operates on an entirely different scale than standard rotors, it is important to follow these critical rules:

• Strict Compatibility Warning: Do not attempt to force the MDR-S 2.5 into standard Magura MT5/MT7, Shimano, or SRAM calipers. Standard calipers are designed for $1.8 ext{mm}$–$2.0 ext{mm}$ discs; installing a $2.5 ext{mm}$ rotor will leave zero pad clearance and will lock up or damage your system. This rotor is built exclusively for the wide-body Magura Gustav platform.

• The Bedding-In Process: Because of the increased steel mass, this rotor requires a thorough bedding-in procedure to reach full stopping power. Find a safe, flat road and accelerate up to roughly $30 ext{km/h}$ ($18 ext{mph}$), then smoothly bring the bike down to a walking pace without locking the wheels. Repeat this process 20 to 30 times per wheel. This transfers a uniform layer of microscopic pad material onto the sanded chrome steel, ensuring silent operation and maximum bite.

EVO Opinion:

The Magura MDR-S 2.5 Heavy Duty Disc Brake Rotor is a purpose-built component designed exclusively to handle the massive thermal loads of gravity, enduro, and full-power e-MTB riding. Engineered specifically as part of the next-generation Gustav Pro and Gustav Elite braking ecosystems, this rotor sets a new industry benchmark by stepping up to a massive 2.5mm thickness—providing unparalleled heat absorption, fade resistance, and a quiet, vibration-free ride feel.

Note: Only compatible with the Gustav PRO & Gustav Elite disc brakes