Ergonomic shape and durable cork/rubber construction give optimum anti-slip control even on demanding terrain or in wet conditions. Soft & ribbed patterned texture provide superior vibration dampening and increase comfort by reducing hand fatigue on long rides. They feel great with both gloves and bare hands. Designed to fit any standard straight bicycle handlebar with an outer diameter between 20-22mm. Installation is easy with a single lock-on alloy clamping collar that keeps grips in place while you ride - hex wrench included