Your Kub Kar must meet the following specifications to qualify:
1. Overall width, including wheels, shall not 1. exceed 7 cm (2.75 inches)
2. Length shall not exceed 17.8 cm (7 inches)
3. Weight shall not exceed 142 g (5 ounces)
4. The minimum distance between the wheels is 4.5 cm (1.75 inches)
5. Clearance between the chassis and the track should be 0.95 cm
6. Axles, and wheels shall be from the materials provided in the kit
7. Wheel bearing, washers and bushings are not permitted
8. No lubricating oil shall be used. Axles may, however, be lubricated with powdered graphite
9. The Car shall not ride on any kind of spring
10. The Kar must be "free wheeling" with no starting devices
11. No loose materials of any kind are allowed in the Kar
12. Kars may be weighted, however, weights cannot obstruct the track clearance or interfere with the bottom marking area
13. Your name must be somewhere on your Kub Kar.
14. Wheels may not be modified in any way other than deburring
15. FRONT BUMPER: Due to the starting mechanism used on the tracks, the front of the Kub Kar must have a flat centered horizontal surface, no less than 1 inch (25.4cm) in width and no greater than 5/8 inch (1.6cm) off the track. No part of the Kar or accessories is to stick out beyond the bumper / starting mechanism.