RevGrips Suspension Grips outperform any other grip because they do not contact your handlebar. The inner diameter of the grip is approximately 1/8 of an inch larger than the outside diameter of the handlebar and is "suspended" in an elastomer on each side of the grip. This unique design allows the grip to work WITH your hands, isolated from shock and vibration, and independent of your handlebar. Tuning washers are placed between the grip sleeve and clamp to customize feel and performance so you can allow your grip to "move" as little or as much as desired (just like a fork or shock). The Pro Series Ergonomic Grip is the latest release from RevGrips which represents the ultimate in Grip Technology. The Pro Series Grip System comes complete with aluminum bar ends, tuning kit, assembly tools