Swap in GPM TRX4022B aluminium rear knuckle arms on your Traxxas TRX4 to stabilise inner gear engagement and reduce slop on rough sections. Manufactured from 6061 T6 aluminium with precision CNC work, these knuckles offer a stronger contact surface and a clean machined look. They are aimed at hobbyists who want reliable, long lasting hardware without adding complexity to the drivetrain.
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