Sport Modified Rules

2021 Sport Modified (Sport Mod) Monster Truck Rules & Class Information

This class is in the spirit of the first generation of Stage 3 monster trucks that participated in the Penda Series era in the 90’s.  This is intended to be a more budget friendly version of the modified class, wherein the trucks are also easier to control due to lower speeds.  Vehicles in this class can participate in general freestyle, with Pro Mods.

These rules were decided and voted on by the competition committee and are good for the 2021 Calendar Year.

General/Axles: All vehicles must have a minimum of 2 solid axles. Motor on Axle (Clod Buster) gearboxes are legal. Shaft driven trucks are legal.

Tires: Any Clod or USA-1 sized tire is legal, and cutting is allowed. Any traction compound and/or any cleaning chemicals are not allowed to be used on tires at any time.

Wheels: Any scale appearing Clod Buster sized monster truck wheel is legal.

Chassis: Any scale appearing chassis is legal (tube or plates). Season points are tallied with a given chassis.  If chassis is changed during season, points will not transfer.

Wheelbase: No limit.

Width: No limit.

Motors: 17 turn brushed motors are the maximum allowed (NO brushless and NO hand-wound motors), with a two motor maximum.

Battery: Limited to one 7.4V 2S lipo with 100C advertised discharge limit (7.6V are not allowed).  “Cycling” of batteries is prohibited!

Steering: May be 2 or 4WS

Shocks: No maximum number or length.  May be oil filled.

Suspension: 4 link allowed with any type of configuration.

Body: Any body legal. Allowed 1 body/name change per season.  However, a designated concrete/black top body can be run to avoid damaging particular ones, in which case this will not count towards the season name change limit.