New bore cap design decreases overall width of the caliper for better frame compatibility SL design now features a bleed port/nipple for easier bleeding and pistons carried over from EVO calipers With 25 years of experience designing and manufacturing hydraulic brakes, the RX4 brings that knowledge and skill to the world of Road and Cyclocross Does not include lever but can be paired with road shift/brake levers (specific Shimano and SRAM versions available) Neat, slim line 4-piston caliper optimized to be lightweight. Allows top entry pad install Includes: caliper only Rotors and adapters sold separately