Stock

Rules for stock class only.

Pure stock 1962 and thru production

3000-10000# at 500# increments

• 1. A speed limit of 3 MPH and no faster STOCK RPMS and NO SHIFTING.

  2. Tractor must be original in appearance.  No stripping, the tractor must be field ready (starters, Air cleaners, wheels, etc...) Removal of lift arms and PTO stub shafts is allowed (this allows for easier hooking and unhooking)

1. Wheel weights, stock style weights (example slab weights on the front of a John Deere 4020, Allis Chalmers D series), and any other weights that are used must be placed from the center of the back axle to the center of the front spindle. Weights must be contained between these points, attached, and secured.

   1. No altered tires allowed. Tire size within reason with matching rims. No tire chains, dual, or radial tires.  MAXIMUM TIRE SIZE - 0-4500# 170 sq. in. max; 4501-6500# 229 sq. in. max; 6501-10000# 300 sq. in. max. No cut tires. See tire size chart below from Firestone Traction Field and Road and Firestone Field and Road charts. Maximum tire size of 38".

11.2 x 38 =120 sq. in. 12.4 x 38 =140 sq. in. 13.6 x 38 =168 sq. in.

11.2 x 36 =115 sq. in. 12.4 x 36 =135 sq. in. 14.9 x 28 =170 sq. in.

12. 4 x 28 =126 sq. in. 13.6 x 28 =145 sq. in.

13.6 x 24 =130 sq. in. 14.9 x 26 =144 sq. in. 

14.9 x 38 =200 sq. in. 18.4 x 34 =284 sq. in. 18.4 x 38= 300 sq. in.

15.5 x 38 =189 sq. in. 16.9 x 38 =252 sq. in.

16.9 x 34 =229 sq. in. 18.4 x 28 = 250 sq. in.

• 1. Drawbar will be stationary in all directions, stock mount, stock type drawbar, and have a clevis or loop. Drawbar will be no higher than 16” and a minimum of 24” from the pull point to the center of the rear axle and pull from original factory belly point of the tractor.

  2. A 16” tattle tail chain will be attached to the tractor. This chain will be in line with the center of the front wheel spindle. If the driver does not supply a chain, one will be provided and that chain will be a 12” chain.

  3. The driver has the option to make changes to gears in the first 75 feet of the track only (But only once).

  4. Pure stock tractors wising to pull in the classic class without wheelie bars must leave drawbar at 16 inches.

1. Turbochargers are allowed if the tractor originally was equipped with one (example Allis Chalmers D-19, Oliver 99 Detroit). The turbocharger will be of original size and type that the tractor was equipped with.