The Park Speedway · Official Reference
Official Park SpeedwayRules
A concise, easy-to-follow reference for race-day conduct, turn marshalling, batteries, technical inspection, and every current class.
Applies to Every Racer
General Conduct
The Park Speedway operates inside a public city park where families, children, racers, volunteers, and park visitors are present.
Respect the Public Park
- Profanity, vulgar language, arguing, and aggressive behavior are not allowed.
- Treat racers, officials, volunteers, families, and park visitors respectfully.
- Bring concerns to track staff calmly instead of confronting another racer.
Sportsmanship
- No yelling at or making disrespectful remarks toward turn marshals.
- Disagreements must be handled through track officials.
- Unsafe or disruptive behavior may result in removal from racing activity.
Race-Day Responsibility
Turn Marshalling
Turn marshalling keeps racing moving and requires attention, promptness, and respect.
Who Marshals
- The top two finishers from each race marshal the following race.
- Report promptly so the next race is not delayed.
- Notify the announcer before racing if a medical reason prevents you from marshalling.
How to Marshal
- Keep your attention on the cars that are racing.
- Return cars to the racing surface quickly and safely.
- Do not repair, adjust, or work on a car while marshalling.
Safety & Technical Standard
Battery Rules
The same battery-voltage limit applies across all classes unless a class rule states otherwise.
Maximum Voltage
- Any legal 2-cell LiPo battery may be used.
- Maximum battery voltage is 8.44 volts.
- LiHV batteries are also limited to 8.44 volts.
Inspection
- Batteries may be checked during technical inspection.
- Competition events may include mandatory voltage checks.
- The racer is responsible for presenting a legal battery.
Race-Day Legality
Technical Inspection
Technical inspection protects fair competition and confirms that the car matches the rules for its entered class.
Racer Responsibility
- Each racer is responsible for the legality of the complete vehicle.
- Cars, electronics, batteries, tires, and bodies may be inspected.
- A legal part can still be rejected if it is modified beyond the class rules.
Official Decisions
- Track officials make final race-day technical decisions.
- Ask before building around an unclear interpretation.
- Current posted rules supersede older versions or informal guidance.
Official Class Reference
Class Rules
Open the class you race. Each section uses the same categories for fast reading and comparison.
Sportsman
ElectronicsHobbywing XR10 Justock ESC with 13.5 Justock motor, 12-turn brushed motor with XL-5 ESC, or Traxxas BL-2s system. Any servo.
ChassisTraxxas Slash 2WD LCG or HCG. Stock Slash parts must be used except for currently permitted replacements.
Tires & WheelsOpen short-course tires and wheels.
BodyAny reasonable body. Dirt Late Model-style bodies are permitted when they meet current requirements.
SuspensionStock Slash towers. Stock Slash shocks or permitted Traxxas GTR shocks. Shims permitted.
ImportantNo custom-built or 3D-printed performance parts unless specifically allowed. Left arms stay on the left and right arms on the right.
Super Stock Slash
ElectronicsHobbywing XR10 Justock ESC with 13.5 Justock motor, 12-turn brushed motor with XL-5 ESC, or Traxxas BL-2s system. Any servo.
ChassisTraxxas Slash 2WD LCG or HCG with current stock-part and replacement-part limits.
Tires & WheelsOpen short-course tires and wheels.
BodyA dirt Late Model body is required.
SuspensionStock Slash towers. Stock Slash shocks or permitted Traxxas GTR shocks. Shims permitted.
ImportantNo custom-built or 3D-printed performance parts unless specifically allowed. Left arms stay on the left and right arms on the right.
Traxxas Modified
PlatformThe factory Traxxas Modified is the reference vehicle.
ElectronicsThe factory BL-2s system is the expected controlled-power foundation.
ShocksFactory GTR shock package.
ChangesConfirm event-specific tire, gearing, body, electronics, and replacement-part limits before racing.
BatteryAny legal 2-cell battery at or below 8.44 volts.
ImportantThe main rulebook does not currently publish a separate complete Traxxas Modified section. Event-specific guidance controls.
Street Stock
ElectronicsHobbywing XR10 Justock ESC and Justock 13.5 motor only. Stock firmware and settings. Approved motor seal required.
ChassisAny commercially available production buggy chassis. Rear- or mid-motor. No custom-built chassis.
TiresOpen buggy tires. Tire additives and treatments are permitted.
Rear ArmsAdjustable rear arms are prohibited.
BodyStreet Stock appearance, windshield required, no decking, and a maximum 1-inch rear spoiler.
SuspensionAny shocks and shock towers.
13.5 Late Model
ElectronicsHobbywing XR10 Justock ESC and Justock 13.5 motor only. Stock firmware and settings. Approved motor seal required.
Chassis2WD transmission chassis only. Direct drive is prohibited.
TiresOpen tires for 2026. Tire additives and treatments are permitted.
BodyAny ROAR-approved 1/10-scale Late Model body. Aerodynamic modifications must remain compliant.
Rear ArmsAdjustable and aftermarket rear arms are permitted when they fit within the chassis and body.
SuspensionAny shocks and shock towers.
13.5 Non-Wing Sprint
ElectronicsHobbywing XR10 Justock ESC and Justock 13.5 motor only. Stock firmware and settings. Approved motor seal required.
Chassis2WD transmission chassis only. Direct drive is prohibited.
TiresOpen brand, compound, tread, and size. Tire additives and treatments are permitted.
BodyLegal non-wing sprint configuration. Confirm event-specific body requirements.
SuspensionAny shocks and shock towers.
BatteryAny legal 2-cell battery at or below 8.44 volts.
Mod Sprint
ElectronicsOpen motor and ESC. Tuning and external cooling fans are permitted.
ChassisAny commercially available 1/10-scale production sprint chassis. Custom-built chassis are prohibited.
TiresOpen buggy tires. Tire additives and treatments are permitted.
BodyLegal sprint body and wing configuration for the event.
SuspensionAny shocks and shock towers.
BatteryAny legal 2-cell battery at or below 8.44 volts.
Short Course Modified
ChassisPurpose-built and commercially manufactured vehicles are legal. The GFRP Prodigy is an example.
ElectronicsOpen motor and open ESC.
BodyOpen-wheel dirt modified body resembling a full-size dirt modified.
Tires & WheelsOpen tire rule using short-course-based or short-course-sized wheels and tires.
PreparationFollow manufacturer instructions and all current general rules.
BatteryAny legal 2-cell battery at or below 8.44 volts.
Final Authority
Current posted rules supersede older versions. Ask before building around an unclear interpretation. Track officials have final authority on legality, safety, conduct, and race-day enforcement.