Shimano xtr m9020 trail disc brake leverergonomic powerful and compact servo wave xtr hydraulic disc brake lever is performance optimized with full adjustability on the flyfeatures short stroke servo wave mechanism with sil tec coated roller for a quick smooth pad engagement and more power for aggressive riding excellent clearance at the caliper has enabled shimano to use a short stroke servo wave mechanism as the brake lever is pulled a cam linkage enables rapid pad to rotor engagement at