TRF420 D-Parts Sus Arms, chassis spare parts

The TRF420 D-Parts Sus Arms are spare suspension arm parts developed for the TRF420 racing chassis kit. The set contains 2 molded parts, shaped for suspension duty and built in carbon fiber-reinforced material to give the arm structure a rigid base where the chassis loads the suspension through corners, braking and acceleration. A revised damper mounting design uses aluminum inserts at the attachment point. By fitting different inserts, sold separately, the lever ratio can be changed across 3 different setups, which adds a clear tuning function to the replacement parts rather than limiting them to like-for-like maintenance. The rear arm layout also carries a 3 mm offset to the rear. That geometry allows use of the shorter TRF420 lower deck while keeping the same wheelbase, and it is specified to increase rear traction. These parts are intended for use with 3 mm diameter shafts. Compatibility is stated for TRF420, and also for TRF419, TA07 and TB-05 PRO chassis cars, with a note that the rear arm offset differs from standard kit parts on the marked chassis and wheelbase adjustment with spacers is required. This makes the set relevant both for TRF420 upkeep and for chassis tuning work across compatible platforms.