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NATPA of NE rules for Division I

Division I is designed for beginning pullers and show tractors and is used to promote stock pulling.
Tractors 1957 and older or production models that started in 1957.


  1. Entry Tractors may pull in two classes, once in each class. A tractor cannot be entered in classes below its manufactured shipping weight.  A Division I tractor may also pull in Division II if the tractor meets the rules for Division II.  Division II tractors cannot drop to Division I.

  2. Maximum tire size - 0-3500# 130 sq. in. max; 3501-4500# 145 sq. in. max; 4501-5500# 170 sq. in. max; 5501-6500# 229 sq. in. max; 6501-7500# 284 sq. in. max; 7501-8500# 300 sq. in max. No cut tires.  See tire size chart below from Firestone Traction Field and Road and Firestone Field and Road charts.

  3. Rims and Wheels - Tractors must have OEM recommended diameter rims and OEM wheels.  Tires must be on rim width, not exceeding tire manufacturer's recommended width. Wheels with rims for manufactures original recommendations to include cut-downs for tractors that may have originally been on steel wheels.

  4. Speed - Low gear not to exceed 2.75 MPH. Not allowed to shift torque.

  5. Weights- Weights of bolt on type to either the front or the back wheels.  Weights can be made. They must be round and made of metal and be as near appearing to original manufactured weights as possible.  No concrete or suitcase weights allowed.

  6. Engine - Stock block, naturally aspirated. Exceptions: Oliver 99 GM, etc.  Stock head, manifold, and carburetor .  Manifolds are to be replacement manufactured parts accepted for that make and model tractor.    Stock engine RPM.  Engine parts not in parts book for that specific tractor cannot be used.  Exceptions: Distributors can be used on Antique tractors.  A factory coil must be used. No electronic ignitions.

  7. Hitches - Maximum 16" height (stationary in all directions) locked at 16 on tractors such as IH fast hitch, Ford 3-point hitch, etc.  Hitches must be as from factory-unaltered for that specific tractor.  Operator must furnish a straight up and down clevis with a minimum opening of 2.5 bolted or pinned tightly with spacers to the draw bar.  Hitch measured at hook point of clevis.

  8. Safety - The front wheels of the tractor are not allowed to exceed 16 off the ground during a pull.  Operator is to provide a linked chain or device attached parallel with the center of the front axle with a maximum of 16 on the ground.  Chain must be dragging at the time tractor is hooked.  Wheelie bars are optional.  If wheelie bars meeting upper division requirements are used, the above nose height rule does not apply.  A minimum of 5 sled hitch chain must be used.

  9. Appearance - Tractors should maintain original stock appearance.  If a part is not found in the manufacturers parts book it can not be used. Seat must be an stock seat or a manufactured seat placed with stock mountings (such as TSC).  Home made side shields will not be allowed.  Exception: factory side shields such as Olivers.  Alternators and straight pipes are allowed.

  10. Sponsors - Advertising plaques or signs 144 sq. in. maximum may be put on tractor as long as it does not interfere with teching of tractor.

0 - 3500# class 130 sq. in.
11.2 x 38 - 120 sq. in.
11.2 x 36 - 115 sq. in.
12.4 x 28 - 126 sq. in.
13.6 x 24 - 130 sq. in.
3501 - 4500# class 145 sq. in.
12.4 x 38 - 140 sq. in.
12.4 x 36 - 135 sq. in.
13.6 x 28 - 145 sq. in.
14.9 x 26 - 144 sq. in.
4501-5500# class 170 sq. in.
13.6 x 38 - 168 sq. in
14.9 x 28 - 170 sq. in
5501 - 6500# class 229 sq. in.
14.9 x 38 - 200 sq. in.
15.5 x 38 - 189 sq. in.
16.9 x 34 - 229 sq. in.
6501-7500# class 284 sq. in.
18.4 x 34 - 284 sq. in.
16.9 x 38- 252 sq. in.
18.4 x 28 - 250 sq. in.
7501 - 8500# class 300 sq. in.
18.4 x 38 - 300 sq. in.
16.9 x 38 - 252 sq. in.
18.4 x 28 - 250 sq. in.