Tamiya M1025 Hummer Front Lower Suspension Arm HM1055 Aluminium Upgrade by GPM  [HM1055]

Aluminium front lower arm summary

This aluminium front lower suspension arm is an aftermarket replacement for the Tamiya M1025 Hummer chassis, manufactured by GPM and supplied as 1 pr. It replaces the original plastic lower arm on compatible M1025 mounting points without requiring chassis modification.

Intended as a tuning swap rather than a feature-rich accessory, the arm increases suspension stiffness and sharpens steering feedback. Typical installation requires removal of the wheel hub and existing lower arm fasteners, reusing hardware where suitable or fitting replacement fasteners if the originals are not reusable.

Fit this arm when you want to cut flex under load and retain a consistent pivot for suspension geometry during trail or scale off-road use. Note that metal hop-ups change handling, so pair the arm with appropriate shock damping and ride height adjustments for the best balance.

Whether replacing a worn plastic arm or trialling a firmer baseline for suspension setup on an M1025 Hummer, this aluminium arm from GPM provides a direct, low-impact upgrade that keeps geometry and fitment straightforward.