TRF421X / TRF421 Rear Chassis Brace - Tamiya 3404177  [3404177]

Stiffener fitted to the TRF421 rear section

This hop-up rear stiffener is made for the TRF421 platform and is intended to modify rear chassis stiffness for more precise handling. It influences the rear behaviour through acceleration, cornering and traction transitions so setups can be tuned without altering suspension geometry.

The part secures to the rear area of the TRF421 chassis and should be installed following standard hop-up and maintenance procedures. Since it targets chassis stiffness rather than suspension travel, it is commonly used alongside incremental changes to shocks, springs or anti-roll bars to reach the preferred handling balance.

Setup advice: installing the rear brace typically firms up rear traction and reduces flex; apply it to combat oversteer or to steady the rear on fast corners, then reassess shock damping and roll centre settings for a cohesive setup.