TRAXXAS XRT/X-Maxx Spur & Pinion Assembly XRT3320S by GPM  [XRT3320S]

Spur and pinion upgrade tailored for TRAXXAS XRT 8S

This kit serves as an aftermarket drivetrain upgrade combining a 33T spur gear with a 20T transmission input pinion mounted to a stiff aluminum plate with bearing support. Main gear components are 20CrMnTi steel, while the fixed plate is machined from aluminum 7075 to produce a three-point support that increases transmission rigidity versus two-point setups.

Fitment notes: the assembly integrates the motor gear into the input shaft to eliminate the separate 2.5mm locating pin seen on some stock pieces. Shims and a bearing are included to help set endplay and correct mesh. The spur is a 1.5 module with a D-shaped motor bore and 14mm tooth face, and the input gear is 1.0 module with 20 teeth.

For tuners replacing worn plastic driveline components on the compatible TRAXXAS 1/6 and 1/5 models, the hardened steel gears and 7075 mount deliver improved wear resistance and stiffer shaft support; always cross-check part fitment against TRAXXAS 1/5 X-Maxx 8S Monster Truck-77096-4 which is excluded.