Usually only suited for short wheel base vehicles. Axle upgrades highly recommended. Speed continuously under 1 mph. A day run is typically 1 mile in length. These trails are typically very hard on tires.
Breakage is usually due to excessive torque or torque spikes on axles or steering components.
However, due to terrain, this is not always possible. Wet trail conditions can raise the numerical rating for the trail by .5 or higher depending on water crossing depth, soil conditions, etc. Trail ratings can vary by plus or minus .5 from year to year, due to changing conditions. The suggested minimum vehicle requirements and driver experience levels are based upon the following assumptions. That the vehicle will be driven under its own power throughout the entire trail.