Prepare your semi to be Ready for the Road Ahead™, with the OTR 15.5" x 2" 9-Spring Self Adjust Clutch that provides a seamless transition of gears. To permit the safe change of gears, this replacement component engages / disengages the engine from the transmission. Built with top-tier materials to reduce drag, transmit maximum power, and deliver a smooth engagement. FleetPride is your First Click in Heavy Duty®.