The MST RMX 4 S Pro 1/10 RWD Electric Drift Car Kit represents a masterclass in drift performance engineering. Built with precision and adaptability in mind, this chassis system delivers professional grade control and customisation. Every component has been designed for maximum adjustability, balance, and reliability, ensuring a smooth and responsive driving experience on any surface. Whether for casual drifting or competitive use, the RMX 4 S Pro sets a higher benchmark in performance and tuning flexibility.

Chassis Design & Construction

The RMX 4 S Pro's chassis is built around a Torsion Type Dual Vertical Deck Layout, delivering exceptional rigidity and controlled flexibility for precise handling. The glass fibre reinforced nylon components ensure lightweight strength without sacrificing durability. Adjustable wheelbase options include 257, 266, and 275 millimetres, making it compatible with a wide range of body shells. The floating servo mount design eliminates interference between servo movement and chassis flex, while a lightweight quick release battery mount supports both standard and low profile shorty LiPos, allowing for fast swaps and optimal weight placement. Together, these innovations make the chassis both practical and performance oriented.

Drivetrain & Power Delivery

At the heart of the RMX 4 S Pro is an Anti Torque 4-Gear Transmission, designed for smooth, consistent torque delivery and effortless drift initiation. This setup can be converted to a three gear configuration for drivers who prefer a torque positive layout. The gear differential is included as standard, providing a balanced blend of traction and slip for controllable, progressive power transfer. The triple level adjustable motor position allows fine tuning of the car's centre of gravity, complemented by an ESC mount that supports both high and low centre of gravity (CG) setups. These features give the RMX 4 S Pro unmatched adaptability for any driving style.

Suspension & Steering Performance

MST equipped the RMX 4 S Pro with an advanced suspension system that enhances stability, precision, and responsiveness. The short rear suspension arms improve lateral weight transfer, optimising drift control. Bullhorn style shock towers allow for a wide range of adjustable shock angles, while TR56 aluminium oil dampers and progressive DK short springs ensure consistent damping performance. The ATK V3 Knuckle Set offers zero trail and wide steering angles for aggressive drift entries, supported by a steering arm system with fine Ackermann adjustment and a built in 3° caster angle to reduce steering pump.

Features

Three Adjustable Wheelbase Options (257 / 266 / 275mm) for versatile body compatibility.

Innovative Subframe Design enables quick and easy removal of the rear suspension system.

New Short Rear Suspension Arms enhance lateral weight transfer for improved stability and control.

Quick Release Gearbox Design for simplified maintenance and differential access.

S PRO version includes a Gear Differential as standard.

Anti Torque 4 Gear Transmission included; easily convertible to a standard 3 gear layout for torque positive setup.

Triple Level Adjustable Motor Position to fine tune chassis balance and centre of gravity.

Perfect spot above the rear axle for 380 lightweight motors.

ESC mount supports both high and low CG installation options.

Torsion Type Dual Vertical Deck Layout improves longitudinal rigidity while maintaining optimal lateral flex.

Floating Servo Mount Design prevents interference between servo and chassis flex during cornering.

New Steering Arm System with fine Ackermann adjustment and built in 3° caster angle to reduce steering pump.

All New ATK V3 Knuckle Set optimised for large steering angles; 0° trail for fast initial response, wide throw for maximum drift angle.

Lightweight One Piece Front Bulkhead Assembly for simple and efficient installation.

New Front Upper & Lower Arms with simplified installation and dual position caster adjustment.

Bullhorn Style Shock Towers at both front and rear allow for infinitely adjustable shock angles.

S PRO version includes a Servo Saver Damper for advanced protection and extended servo life.

TR56 Aluminium Oil Dampers + New Progressive DK Short Springs included in S PRO version.

Lightweight Quick Release Battery Mount supports both standard and low profile shorty LiPos.

All plastic components are constructed from glass fibre reinforced nylon to maintain optimal rigidity throughout the chassis.

Assembly Level - Assembly kit (without electronics).

Includes:

1 x RMX 4 S Pro 1/10 RWD Electric Drift Car Kit

1 x Manual

Needed To Complete

(1) 2+ Channel Transmitter/Receiver System

(1) 1/10 ESC and Motor

(1) Drift Gyro

(1) 2S LiPo or 6-Cell NiMH Battery Pack

(1) Compatible Battery Charger

(1) 1/10 Polycarbonate Body

(4) Drift Wheels and Tyres

Polycarbonate Paint for Body

RC Kits are an unassembled Remote Control Model that require assembly, racer selected electronics, and other racer items. Photos of assembled kit are for illustrative purposes only. For a complete list of needed items to drive this kit please see the list above.