Heavy Duty Bevel Gear Set 36T/14TDetails: Optional Ratio Gear Sets. Use the gears in different combinations front and rear to reduce torque twist in the rear and overdrive the front axle to help pull you through climbs easier The heavy duty gear set offers improved gear mesh reducing slop in the drive train Spiral cut gears offer increased gear tooth contact and run quieter New gear ratios offer a low gear and high gear range Hardened steel for increased strength and additional