TRF503 Chassis Kit
Model Number: 42275





Fully independent double wishbone

Chassis Description


Body Type

Lexan/Polycarb Clear


Not included

Original Price

MSRP $1205




front:Not Included
Rear:Not Included

This is the all new TRF503 4WD racing buggy.

The 503 has been developed thanks to the Tamiya Racing Factory team once again putting its extensive race and testing experience to use for Tamiya’s racing enthusiast customers.

The TRF503 off-road chassis is an updated and modified version of the TRF511 that promises to have more traction and improved cornering ability


Construction type: assembly kit

Terrain use: off-road

Drive-train: 4WD

Drive type: belt

Drive line: universal

Differential type: sealed oil-filled gear

Suspension: fully independent double wishbone

Steering mechanism: bell-crank

Shock damper: oil-filled damper

Shock damper material: aluminium

Tire type: not included

Tire tread: n/a

Body material: Polycarbonate

Chassis material: carbon fiber plate

Electronic Speed Control (ESC) : not included

LED Light buckets: no

LED lights: no

Motor: not included

Bearings: shielded ball bearing

Adjustable camber: yes

Adjustable toe angles: front and rear

Adjustable ground clearance: yes

Adjustable gear ratio: yes

Adjustable wheelbase: fixed

Adjustable track width: fixed

Adjustable shock angle: yes

Features a long-wheelbase lower deck. It is 7.5mm greater in length compared to the 511 for improved handling on uneven surfaces.

The motor position has been shifted 10.5mm toward the front of the chassis to improve controllability, while the motor mount is 5mm closer to the centerline, which helps to reduce chassis roll.

The ability to handle higher-power motors stems from the NEW single-piece aluminium center pulley.

A weight reduction of up to 20% is achieved by using lightweight aluminium upper and lower bulkheads.

The aluminium suspension plate is angled at 14 degrees, which is nearly double that of the TRF511. Damper attachment positions have been raised 2mm on the front stay, for optimized front damper rebound.

Universal shafts are secured with ring connectors.

2-channel radio gear & electronic speed control, 7.2v battery & charger, motor, tires

Includes 39T oil-filled gear differentials, big bore aeration dampers and a clear polycarbonate body.

Requires: 2-channel radio gear & electronic speed control, 7.2v battery & charger, polycarbonate paint, tires