What Our Gearhead® Experts Are Saying: "I recommend the MDR-S for heavy e-bike or aggressive trail builds running the Gustav Pro. The 2. 5mm thickness noticeably improves heat stability on long descents, and braking feels smoother and quieter than thinner rotors. The cutout design does a good job clearing debris in messy conditions. If you’re pushing weight and speed, this rotor adds confidence." When we’re charging steep descents on a loaded e-bike or pushing hard through technical terrain, consistent braking performance matters most. The Magura MDR-S Brake Rotor is built to handle extreme demands, pairing seamlessly with the Gustav Pro hydraulic disc brake for powerful, predictable stopping under serious loads. Constructed from 2. 5mm thick stainless steel, the MDR-S dissipates heat efficiently to reduce fade and resist warping far better than standard rotors. The result is quieter operation and smoother, more consistent braking feel. Strategically shaped cutouts and a subtle wavy profile vent gases during heavy braking while clearing dirt and debris from the pads for reliable performance in challenging conditions. A wear indicator appears at 2. 1mm thickness to signal replacement timing, ensuring long-term safety and performance. Designed specifically for Gustav Pro calipers and compatible with organic/resin pads only, the MDR-S delivers high-capacity braking for demanding e-bike and aggressive trail setups.