2022 Race Class Rules
A Class- Sportsman
B Class-Street Stock
C Class-Super Stock
D Class- Trail
E Class- Pro Stock
F Class- Open
- Must be 4 or 6 cylinder
- Single carburetor, OEM injection, or CARB approved fuel injection
- Single fuel of Gasoline, E85, Diesel, or Propane only, No exotic fuels or NOS injection
- May modify body but must be of recognizable production style
- DOT tires only, cutting allowed
- Must use factory style transfer case
- Must pull 15 inches of vacuum measured at the manifold, 1000 RPM maximum
- Must follow all General Rules
B Class-Street Stock
- Uncut DOT tires only, 35” or smaller
- Must be DOT street legal
- Functional headlights
- Functional taillights
- Functional brake lights
- Mirrors
- Must have street legal muffled exhaust, no higher than 99 decibels. Headers allowed
- Any items to make it DOT Compliant
- Must pull 18 inches of vacuum, measured at manifold at 1000 RPM maximum
- Single carburetor, OEM fuel injection, or CARB approved fuel injection.
- Single fuel of Gasoline, E85, Diesel, or Propane. No exotic fuels or NOS injection
- Must have complete factory body, no cutting of body or firewall except trimming fenders to clear larger tires
- Must have full dash with working speedometer, after market gauges allowed
- No gutting of drivers compartment or doors
- Must use factory style suspension, lift kits allowed
- Must use factory style transfer case
- Must follow all general rules
C Class-Super Stock
- 36” maximum tire size
- DOT tires only, cutting allowed
- Engine swaps allowed
- Single fuel of Gasoline, E85, Diesel, or Propane. No exotic fuels or NOS injection
- Single carburetor, OEM fuel injection, or CARB approved replacement fuel injection
- Must pull 15 inches of vacuum, measured at the manifold, 1000 RPM Maximum
- Must have complete factory body matching same size factory frame
- No cutting of body or except trimming fenders to allow larger tires
- Must have factory radiator support and tie bar panel(aka header panel, panel that headlights and grill mount to)
- If applicable, box may be replaced by a useable flatbed that is cab width and frame length
- Interior removable panels can be eliminated but all interior sheet metal must remain unless a frame mounted full roll cage is installed
- Glass and bumpers can be removed
- Open headers allowed
- Transmission brake not allowed. Vehicle may have the system but must have a disarm switch
- Factory style suspension required, no additional traction link from frame to axle allowed
- Must follow all general rules
D Class- Trail
- Any frame and motor combination
- Must meet all Rochester Rough Rider trail vehicle safety rules
- Must have previously attended and participated in a club or state sponsored off road event with documentation to support such claim
- Any tire type and size
- Exhaust must meet the DNR maximum decibel reading of 99 decibels
- Vehicle must have current OHV sticker
- Single fuel of Gasoline, E85, Diesel, or Propane. No exotic fuels or NOS injections
- Must follow all general rules
E Class- Pro Stock
- Any tire type
- Engine swaps allowed
- Any frame and motor combination
- Any fuel combination
- U Joint shields and driveshaft loops required unless the truck qualifies for a lower class
- A Frame mounted full roll cage is required if any interior structural body panel is removed
- 4 point racing harness required unless vehicle qualifies for lower class
- NOS and forced induction allowed
- Must follow all general rules
F Class- Open
- Any frame and motor combination
- U Joint shields and driveshaft safety loops required unless vehicle qualifies for a lower class
- Vehicle are required to have a frame mounted full roll cage unless vehicle qualifies for a lower class
- Any tire type
- Any fuel combination allowed
- NOS and forced induction allowed
- 4 point racing harness required
- Must follow all general rules