Tamiya 42389 TRF104 1/10 Formula Race Chassis Kit  [42389]

Racing-focused 1/10 TRF104 chassis by Tamiya

At the peak of RC Formula One design, the Tamiya 42389 TRF104 chassis brings a focused mix of carbon fiber and aluminum to deliver stiff structure and sharp handling. This 1/10 scale platform targets racers who prioritise setup and consistent lap times.

Advanced suspension setup for precise cornering

The TRF104 features a refined suspension layout front and rear for superior control. The front uses adjustable plastic upper A-arms so you can set camber between +1 and -3 degrees and dial in caster at predefined increments to suit different tracks and tyre choices.

At the rear, Tamiya replaces conventional suspension links and T-bars with ball connectors to create a central roll arrangement. That design lets you tune roll speed using friction grease and roll dampers, while the flexible FRP suspension plate and TRF damper add predictable feedback through corners.

Centralised component layout to improve grip

Weight distribution matters on asphalt circuits. The TRF104 centralises the battery pack, receiver and servo to enhance rear traction and reduce the chance of traction loss during high speed direction changes.

Tuning options for setup and stability

Customization is built into the design: the motor mount lets you change ground clearance in 0.8mm steps and choose between two wheelbase positions. Steering geometry can be altered with four different linkage setups for a more direct feel.

The rear differential originates from the TRF103 and the lightweight carbon fiber shaft helps durability when running heavier rubber tyres. Dual rear wing mounting positions give you another lever to balance high speed stability versus corner agility.

The Tamiya 42389 TRF104 is built for racers who want a platform that responds to careful setup and upgrades. Its mix of materials and tuning choices make it a competitive foundation on smooth tracks.