TB4056 Rear Suspension Arm Precision Upgrade for TB-04 by GPM  [TB4056]

Precision-fit aluminium rear arm for TB-04

This aluminium rear suspension arm is an aftermarket replacement for the Tamiya TB04 platform, supplied as part number TB4056. The component is provided as one pair for users requiring a robust metal lower arm to replace factory plastic parts and to stabilise rear geometry under load.

Installation follows standard procedure: remove the stock rear lower arm, verify TB-04 mounting alignment and fastener compatibility, then install the alloy arm using the original screws and ball studs when appropriate. Confirm full suspension travel and perform wheel alignment checks after fitting.

Functionally, the aluminium arm raises local stiffness at the lower-arm mount compared with standard plastic components, which reduces mounting flex and can influence rear traction and roll characteristics. Use incremental setup changes to damping and toe to achieve the desired handling balance following installation.