Tamiya 51639 TRF420 D Parts Rear Offset Suspension Arms  [51639]

Competition Suspension Arms for TRF420

Built for the Tamiya TRF420 racing chassis, these suspension arms are formed from carbon reinforced plastic to stiffen suspension response and resist track wear. The stronger construction supports consistent lap times under heavy load.

Tuning and Damper Mount Options

The Tamiya 51639 design incorporates aluminium damper insert points so you can alter lever ratio using different insert choices (sold separately). That makes it straightforward to adjust balance between front and rear grip.

Rear Offset for Better Grip

The rear arms carry a 3mm rear offset to match the shorter TRF420 lower deck while keeping the same wheelbase, resulting in improved rear traction during acceleration and corner exits.

Fitment Notes and Hardware

Compatible with TRF420, TRF419, TA07 and TB-05 PRO chassis, these arms need 3mm diameter shafts which are sold separately under Item 51637. You may need to use spacers or other adjustments to maintain correct wheelbase on some frames.