Avon Grips is already well known for the quality or their air cushioned ergonomic grips. I think the first company to have offered such a concept on several of their models. Then, Avon proposed a version adding a throttle assist to their grips. And now you can buy the trottle assist as an add-on that will be very useful and relaxing for these long rides. Cap is adjustable, just loosen screw inside throttle and move cap to your most comfortable position. Complete pair of Air Cushion Chrome or Black Grips with Throttle Assist $78.00. Throttle Assist $19.00. Avon Grips.