United Pullers of Iowa (UPI)

Our Sponsors are:
Farmers Win Coop
Plainfield Welding & Repair
Harrison Truck Centers
Randie Mueller Pioneer
Cen-pe-co Lubricants
What You Will See at an Event

The tractors and trucks may look like standard-issue farm equipment but you will not see these vehicles out pulling a plow or wagon. Tractor and truck pulling is a sport based on horsepower and torque, this means that the engines must be specially modified to generate the greatest amount of power possible. Various classes organize the vehicles based on limitations, rules, and regulations to keep the competition fair.

LSS = Light Super Stock
LLSS = Light Limited Super Stock
HSS = Heavy Super Stock
HSSD = Heavy Super Stock, Diesel Only
SSD = Super Stock Diesel
SSO = Super Stock Open
SF = Super Farm
PS = Pro Stock
LT PS = Light Pro Stock
LIM PS = Limited Pro Stock
PF = Pro Farm
HF = Hot Farm
TWD = Two Wheel Drive
FWD = Four Wheel Drive
PSD 4x4 = Pro Stock Diesel Four Wheel Drive
SSD 4x4 = Super Stock Diesel Four Wheel Drive
LT FWD = Light Four Wheel Drive
PS-4x4 = Pro Stock Four Wheel Drive
PS-SEMI = Pro Stock Semi
SEMI = Super Semi
MINI = Modified Mini
LT UNL = Light Unlimited
MOD = Modified
UNL = Unlimited