Shimano XTR BR-M9220 4-Piston Caliper Brakeset Model:Right the Spark 900 is what

the Spark 900 is what comes to mind when we think of the perfect mountain bike

A sipe (groove) in each of the side knobs allows them to flex and conform to the terrain

Progressive Layering

Rider-focused details – touchscreen compatibility and silicone grip fingertips

Optimized for use with modern wide tires

Shimano XTR BR-M9220 4-Piston Caliper Brakeset Model:Right the Spark 900 is whatThe ultimate in power, consistency and control make the BR M9220 the strongest caliper in the M9200 family. New low viscosity oil keep the M9220 brakes bite point consistent in all trail and weather conditions, and new brake pads eliminate rattling noise caused by vibration. Increased power and consistency coupled with the peace of silence give riders pin point control on rough trails. Key Features Updated Seals and Low Viscosity Oil: Reliable bite