Wolf Tooth Components Karv Cam 6.5mm Thick/32mm Dia Grip Set BlackWolf Tooth Karv Cam Grips Black. Ergonomic Karv grips with a unique cam profile lets you choose the position that best supports your hand position and style of riding. These 6. 5mm grips are great for longer rides as they reduce hand fatigue and finger numbness. 32mm installed diameter handlebar diameter included is perfect for most riders 100% proprietary dual density silicone compound provides excellent vibration damping and conforms to your hand