Tamiya 42275 TRF503 1/10 Performance 4WD Buggy Chassis Kit  [42275]

TRF503 evolution tuned for competitive club racing

For the dedicated RC enthusiast, the Tamiya 42275 - TRF503 represents a refined racing platform from the Tamiya Racing Factory. This 1/10 scale chassis has been reworked to improve traction and cornering compared with previous TRF models, while retaining a race-focused layout that experienced drivers will appreciate.

Key engineering advances on the TRF503

The TRF503 is more than a simple update; it refines layout and balance across the chassis. Notable changes include a longer wheelbase lower deck extended by 7.5mm for added stability over rough lines. The motor is moved forward by 10.5mm and sits nearer the centerline, which reduces roll and helps maintain composure during high-speed direction changes.

The single-piece aluminium centre pulley increases the chassis ability to accept stronger motor setups, and lightweight aluminium bulkheads cut overall mass by about 20%, improving acceleration and steering response.

Chassis balance and suspension tuning

Precision handling is a core focus of the TRF503. The aluminium suspension plate uses a 14 degree cant that nearly doubles the angle found on the prior model, enhancing damper rebound control and smoothing transitions through corners. Big bore aeration dampers combined with oil-filled gear differentials absorb impacts and stabilise the buggy on varied surfaces.

The TRF503 suits performance-minded hobbyists who value a tuneable, lightweight chassis for track days and club events. Its engineering updates make setup choices more effective for competitive driving.