TRAXXAS CRANIAC Monster Truck Spur Adapter and 58T/13T Steel Gear Set CRA155813T by GPM  [CRA155813T]

Aluminium adapter combined with hardened steel gears

This aftermarket kit replaces the factory spur interface on TRAXXAS CRANIAC Monster Truck drivetrains with an aluminium spur gear adapter plus a hardened 58T steel spur and 13T steel pinion supplied as one set. The parts are intended for 1:10 scale RC applications and are made to mate with the stock gearbox and motor pinion without needing chassis modifications.

Installation is accessible for hobbyists comfortable with basic drivetrain work: remove the existing spur assembly from the gearbox, fit the aluminium adapter onto the spur shaft using the correct orientation, mount the 58T spur to the adapter and fasten the 13T pinion to the motor shaft while verifying mesh. Use shims or adjust the motor mount to fine tune mesh and prevent binding or premature wear.

This kit provides a stiffer mounting interface to resist deformation under load, while the steel gears deliver greater wear resistance than softer stock components. Changing tooth counts will alter acceleration and top speed, so perform short test runs and monitor drivetrain temperature after installation.

For a firmer spur mounting and longer-lasting teeth on CRANIAC drivetrains, this set gives a straightforward upgrade path; verify correct gear mesh and check temperatures after the first runs to confirm fitment.