TAMIYA mini 4wd week end race open class 2024

Golden Rule: All Tamiya Cars and parts only.

Rule Updates as of January 1, 2024

Sanding, shaving, curving of rollers is not allowed.
Drilling holes on aluminum rollers, and double aluminum rollers for the purpose of making it lighter is ALLOWED provided the roller still RETAINS ITS ORIGINAL SHAPE.
The limit on the number of rollers (was previously 6) has been removed.
The limits on positioning of rotating mass dampers have been removed.
Only Tamiya Original Rollers are allowed (Customization CNC / Anodizing of Colors NOT ALLOWED
We caution racers from modifying any part wherein the part can no longer be identified definitely as an Original Tamiya part. If inspectors are in doubt, racer will be asked to replace the part.

Update on Inspection

Upon inspection of car, no adjustment may be made to the car. Any adjustment made requires the racer to resubmit the car for inspection again.

Machines

Usable Machine Types
Only Mini 4WD REV, Mini 4WD PRO, Racing Mini 4WD, Super Mini 4WD, Fully-Cowled Mini 4WD, Aero Mini 4WD, Mighty Mini 4WD, and Truckin' Mini 4WD machines are permitted. Further restrictions on machine types may be possible depending on the race event or race class.

Machine Assembly
All machines must be four-wheel drive. Modifications that result in rear-wheel or front-wheel drive are prohibited. Bodies should have stickers applied or be painted, and must be securely attached to the chassis. Please be warned that bodies which are particularly small, or those which it is difficult to check are painted or have stickers applied, may be prohibited. Home-made bodies are prohibited. All machines must go through car inspection and machines that do not pass inspection cannot participate in the race. As a general rule, machines must be assembled by the racer. Some exceptions may be applied. Please ask Race Officials.

Machine Measuring System
All machines must have a 4WD setup and will be subject to the same measuring system as shown below.



Maximum Car Width: Under 105mm
Overall Car Height: Under 70mm
Overall Car Length: Under 165mm
Minimum Ground Clearance: At least 1mm
Minimum Car Weight (including batteries and motor): At least 90g
Front and Rear Tires: Diameter: 22-35mm, Width: 8-26mm (Note that tires must be attached.)
Rollers: There is no limit on the amount of rollers that can be used.
Mass Dampers: The installation positions of rotating mass dampers are no longer limited.
When adding parts to the bumpers, side guards or the chassis, please note the zone restrictions below.

※Definition of Bumpers - For MS chassis, the bumper is the section on the Front or Rear Unit not including the Bumperless Unit. On other chassis, bumpers are the sections forward and rearward of the front and rear gearboxes respectively.
※Definition of Side Guards - Parts that extend from the sides of the chassis between the front and rear tires.