The SRAM X0 Right Hand 10 Speed Bearing Trigger Shifter is a newer smaller design with adjustable pull lever. The updated design also uses ball bearings instead of bushing, this gives a more precise feeling and gives it greater durability. The SRAM Exact Actuation helps to stabilize the uneasy act of balancing rear derailleur hanger, tight cog spacing and exact cable tension. With match makers giving you the ability to bolt it from the lever to your SRAM brake lever leaving more space on your bars. These are compatible with 10 speed rear derailleurs.