Spur Gear, 45 Tooth (32 Pitch) 45-tooth spur gear (32 pitch). Traxxas spur gears allow you to fine-tune the performance of your Traxxas model. Changing gear ratios can help balance torque and speed for different surfaces. Consult your owner's manual for more information on the recommended gear options for your specific model. TRX-4® 1972 Chevrolet® Blazer® High Trail Edition™ TRX-4® 1979 Chevrolet® Blazer® TRX-4® 1979 Ford® Bronco® TRX-4 Chevrolet® K10 High Trail Edition™ TRX-4® Equipped with Traxx® TRX-4® Ford® Bronco® TRX-4® Ford® F-150® High Trail Edition™ TRX-4® Land Rover® Defender® TRX-4® Unassembled Kit TRX -6® Mercedes-Benz® G 63® AMG 6X6 TRX-6® Ultimate RC Hauler Accessory part for these models: TRX-4® Sport High Trail Edition™ TRX-4® Sport