Equip your semi to be Ready for the Road Ahead™, with the OTR 15.5" x 2" 7-Spring Advantage Self-Adjust Clutch, a crucial element that provides a seamless transition of gears. To permit the safe change of gears, this replacement component engages / disengages the engine from the transmission. Fashioned with top-tier materials to transmit maximum power, deliver a smooth engagement, and reduce drag. FleetPride is your First Click in Heavy Duty®.