TAMIYA TT01 Rear Upper Arm Alloy TT057 by GPM  [TT057]

Aluminium rear upper arm for TT01 tuning

This alloy rear upper arm is an aftermarket replacement part produced by GPM for the TAMIYA TT01 chassis, supplied with shims, collars, E-clips and retaining pins. It is a direct-fit substitute for the standard plastic arm and gives a firmer mounting point for the rear hub on 1/10 touring car setups.

Installation notes: the arm uses the included pin retention hardware so fitting follows the TT01 rear hub and suspension layout without extra components. Confirm pin alignment and check clearance around the hub and linkages during fitment, and use the supplied shims to dial in camber and track settings as required.

Tuning role: the alloy construction reduces flex compared with plastic arms, helping to preserve rear suspension geometry under braking and cornering. Use the collars and shims to change lateral spacing and pivot alignment to balance handling and tyre wear.