1/10 TRF421X Chassis Kit delivers elite-level precision, balance, and tuning freedom for competitive on-road touring car racing.

Featuring:

• Race-Proven Double-Deck Carbon Chassis: Ultra-rigid carbon fiber construction enhances cornering stability, steering response, and overall consistency on high-grip tracks.
• Advanced Shaft-Driven 4WD System: Refined drivetrain layout improves weight balance and power delivery for smoother acceleration and corner exit.
• TRF Competition Suspension: Fully adjustable suspension geometry allows fine-tuning for camber, toe, ride height, and roll characteristics.
• Pure Racing Platform: Designed for serious racers—electronics, body, and wheels are chosen by you to match your driving style.

Model Dimensions (Approximate):

• Length: ~440 mm (44 cm)
• Width: ~187 mm (18.7 cm)
• Height: ~110 mm (varies by body)
• Wheelbase: ~257 mm

Technical Specifications:

• Scale: 1:10
• Brand: Tamiya
• Motor Type: Not included (designed for brushless racing motors)
• Battery (vehicle): Requires 7.4V 2S LiPo shorty or standard battery (not included)
• Transmitter batteries: Transmitter battery information not available – please check product details before purchase.
• Run Time: Dependent on motor, gearing, and battery selection
• Drive / Propulsion: Shaft-driven 4WD
• Assembly: Kit build (advanced assembly; no paint required)
• Controller: Requires 2.4GHz radio system (not included)
• Material: Carbon fiber chassis plates, aluminum suspension mounts, steel drivetrain components
• Included: TRF421X chassis kit, suspension components, drivetrain parts, hardware

Perfect for competitive racers and advanced hobbyists who want maximum tuning control, razor-sharp handling, and race-winning potential on asphalt and carpet tracks.

Gift Idea

This model makes a great gift for experienced RC racers and touring car enthusiasts. Age suitability: 14+. Electronics, battery, wheels, tires, body, and radio system are required and sold separately.

Why this model matters

The TRF421X represents the pinnacle of Tamiya Racing Factory engineering. Built from feedback at the highest levels of competition, it offers uncompromising performance, premium materials, and endless adjustability—making it a true weapon on the race circuit.

How to use it

Assemble the chassis carefully following the TRF manual, using quality hex drivers and setup tools. Install your chosen motor, ESC, servo, battery, wheels, and touring car body. Fine-tune suspension, gearing, and alignment to suit track conditions. After each race day, clean the drivetrain, check fasteners, and maintain bearings to keep the chassis performing at peak level.