TAMIYA M1025 Hummer Aluminium Front Knuckle Arm by GPM HM1021  [HM1021]

Aluminium front knuckle arm for steering upgrades

This aluminium front knuckle arm is intended as a replacement hop-up for the TAMIYA M1025 Hummer scale RC, supplied as an aftermarket part by GPM (HM1021). It serves the steering assembly by replacing the standard plastic knuckle with a machined aluminium component to give a firmer mounting point for the steering linkage and to reduce flex under load.

Compatibility is limited to the TAMIYA M1025 Hummer platform and chassis types listed below, and the part is positioned where the steering bellcrank and wheel hub connect. Installation requires basic disassembly of the front suspension and steering linkage, removal of the original knuckle, and reassembly using the vehicle's existing hardware. Observe thread engagement and torque limits appropriate for aluminium parts to avoid fastener wear.

For tuning and setup, this knuckle arm is useful when testing steering feel, scrub radius changes, or when upgrading from plastic parts to metal for durability during frequent use. It does not change electronic settings or affect motor or ESC parameters, it is a structural replacement only.