Pure Stock Rules

Car Body ( the wooden/material structure that holds the weight, axles and other add ons)/ Total Car Dimensions

Wheel Base : Stock BSA wheelbase 4 3/8″ in the stock location…
Total Car Height : Not to exceed 3″ inches…
Total Car Length : Not to exceed 7″ inches…
Total Car BODY Width : Not to exceed 1-3/4″ inches…
Total Car Weight : Not to exceed 5.0 ounces (+.04) or 143 grams even measured on 1/10th digital scale

Additional materials maybe added as long as they meet the rules

4 Axles & Wheels must be installed to the side of the car body directly across from one another / No more than a 10 degree angle

NO FENDERS, AERODYNAMIC MODIFICATIONS, WEIGHTS OR DECORATIONS ALLOWED MOUNTED IN ANY FASHION TO SEAT IN FRONT OF OR BEHIND THE WHEELS OR ANYWHERE ON THE SIDE BETWEEN OR INSIDE THE FRONT AND REAR WHEEL. NO MODIFICATIONS MOUNTED TO THE CAR CAN EXTENDED PAST THE SIDE OF THE CAR.

Track Center Rail Height : 1/4″ inch ( 7mm ) *
Track Center Rail Width : 1 5/8″ inches (4.2 cm) *

* Wheels must clear the outside to outside center rail width measurement

Axles

a. Minimum diameter .084
b. Axles must have a nail head

Wheels

BSA New Style Mold Post 2009

a. May be CnCed, lathed, polished and/or sanded to true the edge of tread, surface and circumference
b. The tread / contact surface must remain flat and parallel to the bore as humanly possible
c. No Angling, Reshaping, Canting, Round Crowning, Tapering, H-ing, V-ing, Dishing, the outside of the wheels and/or tread surface
d. All writing must remain visible on the inside and outside of the wheel.
e. NO Wheel covers may be used
f. 7.5mm Minimum Tread Width
g. Wheels must weigh at least 2.4 grams and a wheel can be removed after the race to be weighed to confirm weight.
h. The wheels can be trued to get to the 2.4 gram weight but they are not to be cut down intentionally under the weight limit and use foreign material to bring it back to weight.

The following Modifications are not allowed

a. Starting or finish line devices
b. Electronic or lighting devices
c. Glass or extremely fragile parts
d. Paint that is wet, smudges or extremely sticky
e. Wheel Bearings
f. Sharp objects, sandpaper or abrasives on the bottom of car (We do not want any damage to the rubber stopping pads)
g. Axles and/or wheels attached to any device that mechanically or alters rotation and spin