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.
The TR-1 has the wheelbase of 94 mm, which is the longest of all the Mini 4WD 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 control the car's acceleration. The receiver is slotted in between the battery compartment and the motor mount, and was covered 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.
|Ground Clearance||4 mm|
|Driveshaft Length||72 mm|
|Compatible Gear Set(s)||5:1|
|Roller Down Thrust Angle||N/A|
- 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|
|R/C Mini 4WD||TR-1|
|PRO/REV||MS · AR · MA · FM-A|