🏁 The TRF421X Tamiya is a 1/10 scale RC competition chassis with 4WD and 2 belts, designed to maximize stability and efficiency. With its 2.0 mm aluminum chassis, aluminum motor mount, and race-tested suspension/steering upgrades, it is aimed at demanding drivers looking for precise settings and performance.
⚙️ Technical specifications
- Scale: 1/10
- Type: touring car competition chassis kit
- Transmission: 4WD dual belt
- Lower chassis: 2.0 mm aluminum
- Motor mount: aluminum
- Motor position: 1.04 mm lower than TRF421
- One-piece or two-piece upper chassis (improved flex)
- Flex adjustment via shims 0 to 0.3 mm
- Upper/lower control arms in carbon-reinforced nylon
⚙️ Suspension & steering
- Front/rear shock mounts: points moved 1.0 mm inward
- Upper wishbone mounts: pivot lowered by 1 mm
- Roll adjustment via bushings on the upper control arm mount
- Steering knuckles with optimized Ackermann and rear grip settings
⚙️ Drive shafts & transmission
- Front transmission with double universal joints
- Lightweight aluminum universal rear drive shafts with bearings
- Steel front drive shaft nuts and rear differential nuts
- Front: direct coupling
- Rear: oil-bath pinion differential
- Extended compatibility with TRF421 parts/options
🧩 Kit contents
- TRF421X chassis kit Tamiya to assemble
- 2.0 mm aluminum lower chassis
- Specific aluminum motor mount
- Suspension, steering, and transmission components
- Dedicated TRF421X carrying case
- Screws and instructions Tamiya
❗ To be provided
- Body touring 1/10
- Motor
- ESC (ESC)
- Steering servo
- Battery and charger
- Wheels and tires
- Radio and receiver
🎯 Who is it for?
- 1/10 competition drivers
- Users looking for precise settings and maximum performance
- Ideal on high-grip tracks (asphalt, carpet)
