The basic idea of the tractor pulling race is to pull a heavy trailer (sled) along the race track as far as possible. The winner in the race is the one who is able to drive the longest distance and the aim is to make a "Full Pull".
The pulling tractors are divided into four different categories. For the standard agricultural tractors there are two classes, Super Stock and Pro Stock. The classes for self designed and built tractors are Modified and Minipullers.
Links:
www.tractorpulling.fi
www.tractorpulling.com
