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Learn the Rules Before You Participate
Find out more about our rules and how they are set
Safety and fairness are top priorities at United Truck And Tractor Pullers. That's why we have clear rules and guidelines for each class of tractor or truck. Our regulations protect our drivers and ensure everyone gets a fair chance to become a champion.
The rules we have outlined below can be updated by our board members if there are changes in the sport. We hope to keep our events the best they can be while keeping our participants safe.
Call 801-618-9532 now if you have any concerns about our rules.
Our Rules
We have rules set for each class of vehicles. They are:
Stock Gas:
Street legal, 7,000 pounds maximum weight. Naturally aspirated gasoline or propane-powered trucks 496 Ci maximum engine displacement.
Open Street:
Street legal, 10,000 pounds maximum with a driver. 3.2-inch maximum turbo bore. Follow WSD safety rules. Class does not accrue points.
Work Stock Diesel:
Truck must have valid state registration, 8,500 pounds maximum weight. DOT tires only. Aftermarket turbo with maximum 2.4-inch maximum bore allowed. Factory turbo must retain stock inducer bore diameter.
2.5 Diesel:
NSPA rules apply. 8,000 pounds maximum with a driver. Compound turbos allowed with only one atmosphere turbo with 2.5-inch bore.
Limited Pro Diesel (3.0 Diesel):
PPL Rules apply. 8,000 pounds maximum with a driver. Maximum 3.0-inch inducer bore.
Pro Stock Diesel (3.6 Diesel):
PPL rules apply. 7,800 pounds maximum with a driver. 460Ci maximum engine displacement with 3.6inch inducer bore turbo.
Super Stock 4 Wheel Drive:
6,200 pounds maximum weight with a driver. 500 Ci maximum engine displacement. Cast iron block with 2 valves per cylinder. Gasoline only.
Pro Stock 4X4:
6,200 pounds maximum weight with driver. 565 Ci maximum engine displacement, 2 valves per cylinder. Gasoline or alcohol allowed. 31-inch pulling or 36-inch DOT tires. 133-inch maximum wheelbase.
Pro Mod and Super Mod 4X4:
6,200 pounds maximum weight with driver. 650 Ci natural aspirated gasoline or alcohol engines. 133inch maximum wheelbase. 34 in pulling tires only.
Modified and Super Mod 2WD:
6,200 pounds maximum weight with driver. Super Mod 2WD limited to 575 Ci engine displacement.
Modified and Super Mod Mini Rods:
2,000 pounds maximum weight and 650 Ci maximum engine displacement for Mod Mini. 2,050 pounds maximum weight and 575 Ci maximum engine displacement for Super Mod.
Super Stock Diesel (Pro Mod):
PPL rules apply. 7,500 pounds maximum weight with a driver. Any diesel engine is allowed, #2 diesel only. 35-inch cut pulling tires required, no duals.
Unlimited Modified Tractor:
Maximum of 2 naturally aspirated or supercharged engines allowed.
Pro Farm Tractor:
6,000-7,500 pounds maximum weight with driver. 300 series engine up to 399 Ci. Single turbo up to S400 box charger. Super Farm Tractor rules apply.
Super Farm Tractor:
8,000-10,500 maximum weight with driver. 400 series engine up to 640 Ci. Single turbo up to 3-inch box charger.
Ask us any questions when you reach out to us today.
