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RMPA (Rocky Mountain Pullers Association)
We, the RMPA would like you to join us and let us show you how brute
horsepower when hooked to the ground can let a 1850-pound vehicle
pull 15,000 pounds of weight transfer sled. How a 6200 pound vehicle
can pull 35,000 pounds down a dirt track.
The object of the contest is to see who can pull the sled the farthest
down the track. The sled as we call it, is technically known as a
weight transfer machine. The modern day sled is composed of three
basic components:
 | the frame and drive line assembly |
 | the skid pad which slides on the ground, and |
 | the weight box which travels forward on the frame to increase the
drag on the skid pan. |
Competitors must combine driving skills, tire traction, knowledge of
track conditions, the right gear ratio and an excess of horsepower to
become winners.
Pulling vehicles are divided into classes
 | Modified tractors |
 | Modified 4x4 trucks |
 | Super Modified and |
 | Modified 2 Wheel Drive Trucks |
 | Super Stock Tractors |
 | Super Modified Tractors and |
 | Modified Mini Tractors |
The difference between the Super Modified and Modified classes are that
the Super Modified have blowers on top of their motors, except for the
Modified Tractor class and they can run naturally aspirated motors or
blown motors in the same class. Stock 4x4's are also a part of the
sport of pulling
The trucks utilize fuel injected drag-racing engines that can put out
more than 1,000 horsepower but are limited to one engine. The Super
Stock tractor pulls with alcohol and diesel fueled engines that have been
modified to generate up to 2,000 horsepower. The Modified
Tractor class can sport up to six of the supercharged racing type motors,
with the most powerful tractors drawing more than 6,000 horsepower.
A pull the length of the track is called a full-pull. Each
vehicle is measured to the nearest inch and whoever pulls the farthest is
the winner of his or her class.
You will watch horsepower unlike you have ever seen. Check the
Schedule to find out when you can visit an Event. |