Avon Air Cushion Spike Grips For Harley With Throttle By Wire Avon Air Cushion Grips are functional and are manufactured with a special Air Cushioned Absorption System (Acas) that softens Kraton rubber. The dampen vibrations help eliminate the tingle in your hands. Soft serrated texture on the grip surface helps you hold on to your bike. Features: Air ride for your hands The most comfortable grips on the market today for shock resistance in your hands and upper body Air pockets inside the Kraton rubber grip absorb unwanted vibrations Billet aluminum ends and rings Will not work with models equipped with air reservoirs in the bars Throttle by wire