The Shimano SM-MA R160P/D Disc Brake Adapter Rear 160mm is a precision-engineered adapter designed to correctly position a rear brake caliper when using a 160mm disc rotor. It allows proper alignment between the caliper and rotor, ensuring consistent braking performance and reliable pad contact. This adapter is essential when upgrading rotor size or replacing brake mounting hardware during service or drivetrain updates.

Built to Shimano’s exacting standards, the adapter provides a secure interface between the frame and brake caliper, helping eliminate alignment issues that can lead to brake rub or uneven pad wear. Correct caliper positioning improves braking modulation and power, particularly under sustained braking or heavier loads. The rear-specific design accounts for typical frame geometry and braking forces encountered at the rear wheel.

Installation is straightforward using standard brake mounting hardware and torque specifications. Once installed, the adapter maintains stable caliper positioning across varied riding conditions, making it suitable for mountain, gravel, commuter, and hybrid bikes equipped with disc brakes. For riders seeking dependable braking performance and proper rotor compatibility, this Shimano adapter is a simple but critical component.