TR-1 Chassis.

The TR-1 Chassis (Japanese: TR-1シャーシ, Tīāru Wan Shāshi) is a Mini 4WD chassis released by Tamiya on July 17, 2002. Based on the Super X Chassis, it debuted with the release of Subaru Impreza WRC 2002 and is made exclusively for R/C Mini 4WD series.

General info

The TR-1 has the wheelbase of 94 mm, which is longer than the wheelbase of the Super X Chassis. It retains that same driveshaft length and track lengths of the Super X. The TR-1 uses the 1.4 mm propeller shaft and drivetrain layout of the chassis is the same as Super X Chassis. It use the orange crown gears by default.

One of the unique features of the TR-1 is that it was made with the R/C system in mind, as it allows racers to controls the acceleration of the car. The receiver is slotted in between the battery compartment and the motor mount, and was covered by a cover when not in use. The bodyshell mounting method has been changed to the snap-type and the front bumper's design was changed because of this change.

TR-1 is not without its flaws, however, as existing bodyshells and most Grade-Up Parts are not compatible with the chassis. This leds to the premature demise of the TR-1 and also the R/C Mini 4WD series as the whole.

Technical info

Chassis Data
Length 150 mm
Width 79 mm
Wheelbase 94 mm
Ground Clearance 4 mm
Driveshaft Length 72 mm
Compatible Gear Set(s) 5:1
Roller Down Thrust Angle N/A
Terminal Type TR-type
Weight 110 g (With alkaline batteries attached)


  • The TR-1 Chassis is the only chassis where use of rechargeable batteries in official races are not permitted due to the current Mini 4WD race regulation. Instead, alkaline batteries must be used.
Original series Origin · Comical · Wild · Cruiser · RV
Type series
Type-1 · Type-2 · Type-3 · Type-4 · Zero · FM · Truckin' · Type-5
Super series
(Super/Mighty, Fully Cowled/Aero)
Super-1 · Super-FM · Super TZ · Super X · VS · Super TZ-X · Super XX · Super-II
Mini-F series Mini-F
R/C Mini 4WD TR-1
Community content is available under CC-BY-SA unless otherwise noted.