Tamiya M1025 Hummer Front Lower Suspension Arm HM1055 Aluminium Hop-Up by GPM  [HM1055]

Summary of the front lower arm

This aluminium front lower suspension arm is supplied as an aftermarket replacement for the Tamiya M1025 Hummer and is produced by GPM, sold as 1 pr. It is intended as a direct swap for the plastic lower arm on compatible M1025 chassis, retaining the original mounting points.

Designed as a tuning component, the arm increases stiffness and refines steering feedback rather than adding functional extras. Fitting normally involves removing the wheel hub and lower arm fasteners, then reusing or replacing hardware as needed.

Install this arm to reduce flex under load and to stabilise the suspension pivot for scale off-road or circuit-style running. Be prepared to retune shocks and ride height to compensate for the stiffer link behaviour.

For replacing a damaged arm or establishing a less flexible baseline on an M1025 Hummer, this GPM aluminium arm offers a direct and reliable upgrade while keeping geometry changes minimal.