Tamiya RC 1/10 TRF421X Chassis Kit 4WD High-Performance Touring Car

Developed for serious competition use, the Tamiya RC 1/10 TRF421X Chassis Kit takes the TRF421 platform to an even more specialised level. Its updated two-belt 4WD architecture combines a lower aluminium motor position, a 2.0mm aluminium lower chassis deck, revised upper decks and carbon-reinforced suspension components to produce a low, rigid and highly tuneable platform for high-traction racing surfaces.

Please note this is an unassembled kit requiring assembly; it ships as a build-it-yourself kit and does not arrive pre-built or ready to run.

The TRF421X moves the motor 1.04mm lower than the standard TRF421, while revised suspension arms and damper stays provide additional flexibility and stability on hot, high-grip and carpet tracks. Precision stabilisers, aluminium dampers, adjustable chassis weights and two selectable upper-deck configurations give experienced racers an extensive range of setup possibilities.

Special Features

• 1/10 scale high-performance 4WD touring car assembly kit.
• Two-belt driven 4WD drivetrain designed for high-traction track conditions.
• Aluminium motor mount positions the motor 1.04mm lower than the standard TRF421 for a lower centre of gravity.
• 2.0mm thick aluminium lower chassis deck provides a precise balance of chassis flexibility, rigidity and weight distribution.
• One-piece and two-piece upper deck configurations allow different chassis-flex characteristics.
• Carbon-reinforced nylon upper and lower suspension arms provide controlled flexibility for demanding track conditions.
• New front and rear damper stays move damper attachment positions 1.0mm inward.
• Precision stabilisers include 1.2mm and 1.3mm options for different track surfaces and driving styles.
• 20g receiver weight and 30g battery weight help optimise overall chassis balance.
• Oil-filled rear gear differential and direct-coupler front drivetrain provide competition-focused power delivery.
• Full ball bearings, adjustable suspension and aluminium TRF dampers are included.
• Designed to be compatible with selected standard TRF421 components and setup parts.

What's in the Box

• Unassembled TRF421X chassis kit components
• 2.0mm aluminium lower chassis deck
• Aluminium motor mount
• One-piece and two-piece upper chassis decks
• Carbon-reinforced nylon upper and lower suspension arms
• New front and rear damper stays
• TRF aluminium oil-filled dampers
• Precision stabiliser bars
• 20g receiver weight
• 30g battery weight
• Front direct coupler and rear oil-filled gear differential
• Front double-cardan shafts and rear universal drive shafts
• Full ball bearings

What You'll Need

• 2-channel radio
• Low-profile steering servo
• ESC
• 540 motor
• Wheels and tyres
• 190mm TC or Sports Car body
• 7.4volt battery pack and compatible charger

Why You'll Love It

The TRF421X is designed for experienced racers who demand precise control over chassis balance and flex. Its lower motor position, aluminium lower deck, revised suspension materials and extensive setup hardware make it a premium platform for extracting maximum performance from high-grip touring-car tracks.