To help eliminate broken disc springs, Ace Manufacturing introduces the E-Z Rider® Clutch with super-tough torsion springs. Available in both 14" and 15-1/2" sizes, the E-Z Rider fits most American Class 6, 7 and 8 vehicles on the road today. The company claims that the springs reduce the incidence of spring breakage due to torsional vibration, dramatically increasing the life of the clutch .