7/8” Wide HYVO gears are built solely for use on the jackshaft. Use the narrower 3/4”-Wide HYVO on the bottom. .780” Wide
15 Wide, 25mm-15 Spline Upper Gear
11 Wide, 27mm-17 Spline, Steel Lower Gear
15 Wide, 7/8″-13 Spline Upper Gear
11 Wide, 1″-15 Spline, Steel Lower Gear