This JR-M705-GU aluminium rear suspension arm set is an aftermarket replacement for the TAMIYA M-07 chassis. The gun metal finish and aluminium construction provide a stiffer mounting point compared with stock plastic arms, helping to stabilise rear-end behaviour when you change setup.
Engineered to match M-07 geometry, the arms use the stock mounting points and hardware for a direct swap without cutting or drilling. The upgrade emphasises chassis response and tuning consistency; reduced flex helps damping and toe adjustments behave more predictably on track.
Installation notes: remove the wheel and, if needed, loosen the rear hub carriers. Replace the original rear arms with these aluminium units using the existing screws and pivot hardware. Inspect pin and bearing fit during reassembly and confirm full suspension travel before running.
Tuning role: as a simple hop-up these arms deliver crisper rear response. Expect the upgrade to interact with shock and toe settings, so retune camber and rebound after fitting to dial in the right balance between traction and precision.
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