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PyroRC | 1/28 Class Rules

Any use of traction compounds or abrasive tire solutions other than 70% rubbing alcohol will result in a permanent track restriction and a $250 fine.

Endurance Race Format

  • Box Stock only - see class rules below for more info.
  • 30 minute race, with 2 drivers per team, no more/less.
  • Drivers must swap at 15 minute mark and share equal drive time.
  • You may swap batteries or perform repairs on your car as needed throughout the race, however keep in mind that this will take away from the number of laps you will be able to complete.
  • No lap passes for more than 300 seconds drops you from the endurance race. You may re-join the race, however it will be at a significant disadvantage as your lap count will reset.
  • It is the driver's responsibility to ensure your transponder does not miss any laps.

Club Race Format

  • Open practice all day until event starts.
  • All classes will have the opportunity to qualify before any mains.
  • 2 rounds of qualifying, fast lap determines main and position. Best time will be used.
  • Qualifiers are 4 minutes, and race mains are 7 minutes.
  • 1 bump up permitted from each main (ie. 1st place B Main races in A Main).
  • It is the driver's responsibility to ensure your transponder does not miss any laps.
BOX STOCK CLASS

Chassis

  • Kyosho Mini-Z MR03 / MR04 RWD
  • 90mm to 102mm wheelbase permitted.

Body

  • Kyosho Autoscale Body or White Body
  • Jomurema GT01 Bodies
  • Any other full hard body - lexan window/roof permitted.

Motor

  • Stock Kyosho MR03 / MR04 Motor.
  • MZ9P & MZ9E only permitted.
  • Direct solder & removal of thermal protector is permitted.
  • Stock Kyosho ESC only.

Wheels

  • Any production (Kyosho, PN, Reflex, etc) wheels are permitted.
  • Rear width of 11mm & front width of 8.5mm only.
  • Wheel offset must fit inside the body and can not extend.

Tires

  • Any production (Kyosho, PN, Marka, etc) tires are permitted.
  • Tires may be warmed or cleaned with 50-70% alcohol solutions.
  • Tires must perfectly fit wheels.

Transmitter

  • Must use stock Kyosho transmitter (KT-531P) included with Readyset.
  • No transmitter modifications are permitted.

Batteries

  • Any production AAA/NiMH re-chargeable batteries permitted.

Optional / Recommended Parts

  • Kyosho or PN Racing ball bearings.
  • Aluminum wheel nut upgrades.
  • Aluminum steering knuckle replacements (0 degree only).
  • T-Plate (Plastic / Carbon / Steel / Fiber Glass)
  • Front spring modifications.
2500KV LIPO CLASS

Chassis

  • Kyosho Mini-Z MR03 / MR04 RWD, RX28, Atomic, MWX, Xbility, RC28, or any other manufacturer solid axle 1/28 scale chassis.
  • 90mm to 102mm wheelbase permitted.

Body

  • Kyosho Autoscale Body or White Body
  • Jomurema GT01 Bodies
  • Any other full hard body - lexan window/roof permitted.

Motor & Gear

  • Any brand sensored/sensorless 2500KV motor (max 2850KV) permitted.
  • Direct solder & removal of thermal protector is permitted.
  • Fixed Gear Ratio - 64 Pitch & 14T Pinion / 53T Spur.
  • Any brand sensored/sensorless ESC permitted.

Wheels

  • Any production (Kyosho, PN, Reflex, etc) wheels are permitted.
  • Rear width of 11mm & front width of 8.5mm only.

Tires

  • Any production (Kyosho, PN, Marka, etc) tires are permitted.
  • Tires may be warmed or cleaned with 50-70% alcohol solutions.
  • Tires must perfectly fit wheels.

Transmitter

  • Any transmitter permitted (Flysky NB4+, RadioMaster MT12, Sanwa, etc).

Batteries

  • Any brand 2S LiPo battery permitted.

Other Notes

  • Minimum car weight of 160g - including battery.
3500KV LIPO CLASS

Chassis

  • Any RWD solid-axle 1/28 chassis permitted.
  • 90mm to 98mm wheelbase permitted.

Body

  • Any/all bodies permitted except for pan car body.
  • Full lexan is permitted.

Motor & Gear

  • Any brand sensored/sensorless 3500KV motor (max 3800KV) permitted.
  • Any ESC permitted.
  • Any gear permitted.
  • Gyro not permitted.

Wheels

  • Any production plastic or aluminum wheels are permitted.
  • Max Front Wheel Width - 11mm
  • Max Rear Wheel Width - 14mm
  • Max Wheel Diameter - 20mm

Tires

  • Any production (Kyosho, PN, Marka, etc) tires are permitted.
  • Tires may be warmed or cleaned with 50-70% alcohol solutions.
  • Tires must perfectly fit wheels.

Transmitter

  • Any transmitter permitted (Flysky NB4+, RadioMaster MT12, Sanwa, etc).

Batteries

  • Any brand 2S LiPo battery permitted.

Other Notes

  • No minimum weight for cars.
KYOSHO EVO CLASS

Chassis

  • Kyosho Mini-Z MR03 / MR04 EVO RWD
  • 90mm to 102mm wheelbase permitted.

Body

  • Kyosho Autoscale Body or White Body
  • Jomurema GT01 Bodies
  • Any other full hard body - lexan window/roof permitted.

Motor

  • Kyosho 5600KV Brushless (sensored/sensorless permitted).
  • Kyosho 44-spur ball diff.
  • Kyosho 9T or PN 9T pinion only.
  • Stock Kyosho EVO board, no mods permitted. ICS programming is allowed.
  • Gyro is not allowed.

Wheels

  • Any production (Kyosho, PN, Reflex, etc) wheels are permitted.
  • Rear width of 11mm & front width of 8.5mm only.
  • Wheel offset must fit inside the body and can not extend.
  • Max Front Wheel Width - 8.5mm
  • Max Rear Wheel Width - 11mm
  • Max Wheel Diameter - 20mm

Tires

  • Any production (Kyosho, PN, Marka, etc) tires are permitted.
  • Tires may be warmed or cleaned with 50-70% alcohol solutions.
  • Tires must perfectly fit wheels.

Transmitter

  • Any transmitter permitted.

Batteries

  • Any production AAA/NiMH re-chargeable batteries permitted. The car must be powered by 4 batteries. No Lipo permitted.

Optional / Recommended Parts

  • Kyosho or PN Racing ball bearings.
  • Aluminum wheel nut upgrades.
  • Aluminum steering knuckle replacements.
  • T-Plate (Plastic / Carbon / Steel / Fiber Glass)
  • Front spring modifications.
3500KV AAA CLASS

Chassis

  • Kyosho Mini-Z MR01 / MR02 / MR03 / MR04 RWD
  • PN 2.5
  • 90mm to 98mm wheelbase permitted.

Body

  • Kyosho Autoscale Body or White Body
  • Jomurema GT01 Bodies
  • Any other full hard body - lexan window/roof permitted.

Motor

  • Any 3500KV sensorless motor (Max 3850KV).
  • Kyosho ASF VE ESC, EVO ESC, PN 16A ESC, only.
  • Gyro not permitted.
  • 64P 16T Pinion
  • 53T Spur Gear only.

Wheels

  • Any production (Kyosho, PN, Reflex, etc) wheels are permitted.
  • Rear width of 11mm & front width of 8.5mm only.
  • Wheel offset must fit inside the body and can not extend.

Tires

  • Any production (Kyosho, PN, Marka, etc) tires are permitted.
  • Tires may be warmed or cleaned with 50-70% alcohol solutions.
  • Tires must perfectly fit wheels.

Batteries

  • Any production AAA/NiMH re-chargeable batteries permitted. No Lipo batteries may be used. Four batteries must be used to power the car.

Notes

  • Minimum car weight 160g (with batteries and body).
2500KV SUPER STOCK CLASS

Chassis

  • Any RWD solid-axle 1/28 chassis permitted.
  • 90mm to 98mm wheelbase permitted.

Body

  • Hard body only permitted.
  • Lexan roof/window/wing permitted.

Motor & Gear

  • Any brand sensored/sensorless 2500KV motor (max 2850KV) permitted.
  • Any ESC permitted.
  • 64P 14T Pinion.
  • 53T Spur Gear only.
  • Gyro not permitted.

Wheels

  • Any production plastic or aluminum wheels are permitted.
  • Max Front Wheel Width - 11mm
  • Max Rear Wheel Width - 14mm
  • Max Wheel Diameter - 20mm

Tires

  • Any production (Kyosho, PN, Marka, etc) tires are permitted.
  • Tires may be warmed or cleaned with 50-70% alcohol solutions.
  • Tires must perfectly fit wheels.

Transmitter

  • Any transmitter permitted (Flysky NB4+, RadioMaster MT12, Sanwa, etc).

Batteries

  • Any brand 2S LiPo battery permitted.

Other Notes

  • Minimum car weight 160g with batteries and body.
FORMULA 1 CLASS

Chassis

  • Any solid-axle 1/28 Formula 1 chassis or conversion permitted.

Body

  • Hard body, lexan, 3D printed bodies, wings, and bumpers are permitted.
  • Front bumper bearing & 16mm rollers highly encouraged to prevent getting stuck.

Motor & Gear

  • Any brand sensored/sensorless 3500KV motor (max 3850KV) permitted.
  • Any ESC permitted.
  • 64P 12T Pinion only.
  • 53T Spur Gear only.
  • Gyro not permitted.

Wheels

  • Any production plastic or aluminum wheels are permitted.
  • Required Front Wheel Width - 11mm
  • Required Rear Wheel Width - 14mm
  • Max Wheel Diameter - 20mm

Tires

  • Any production (Kyosho, PN, Marka, etc) tires are permitted.
  • Tires may be warmed or cleaned with 50-70% alcohol solutions.
  • Tires must perfectly fit wheels.

Transmitter

  • Any transmitter permitted (Flysky NB4+, RadioMaster MT12, Sanwa, etc).

Batteries

  • Any brand 2S LiPo battery permitted.

Other Notes

  • Minimum car weight with everything must be 140g.
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