Super Twenty Eight Rules v1.2

Super Twenty Eight Rules v1.2

by Steve Fujita on Feb 01, 2025 Categories: REVIEW/TECH/HOW-TO

Super Twenty Eight Classes v1.2

Box Stock Class

Chassis:

  • Kyohso MR03S, MR03S2 and MR03 RWD, MR04 RWD

Body:

  • Kyosho original AutoScale body, white body, Jomurema GT01 body and TRP Scale body, PN Racing C9. GL Hard Bodies.
  • All parts must be original from that body
  • Limited wheel clearance modification allowed.

Motor:

  • Kyosho MZ9P and MZ9E Motor from RTR
  • Allow change the motor wire and remove the safety switch

Wheels:

  • Any production wheel allowed, including flanged, discs also allowed
  • Front 8.5mm x 20mm or 19mm.
  • Rear 11mmx20mm.
  • offset must fit inside of the body.

Tire:

  • Any Brand of Rubber Mini-Z production tire ONLY.
  • Traction Compounds NOT allowed on tire or on race surface.
  • Tire warmers are allowed.
  • Tires may be cleaned with a 70% alcohol solution.
  • If a driver uses tire cleaner that has been deemed illegal, the driver will be subject to any penalties that apply.
  • Please address any questions concerning tire cleaners at the drivers meeting.

Electronic & Transmitter:

  • Kyosho original from RTR, NO any modification.
  • Gyro and Receiver build in Gyro is not allowed.

Gear Ratio:

  • Fixed 9T Pinion with Stock Gear Diff.
  • Pinion - Kyosho or PN 400329 MR2709 only.

Wheelbase:

  • 90mm to 102mm

Batteries:

  • Any AAA rechargeable NiMH

Option Parts:

  • Kyosho or PN Ball Bearing
  • Wheel nut
  • T-Plate
  • Front Springs
  • PN Racing High Clamp Force T-plate Part Number MR3009 any color  (For Durability - prevents stripped screw holes on chassis with repeated T- bar replacements)

Modifications:

  • It must be run in stock configuration.
  • MR-03 King Flip allowed..


2WD Stock (Triple A) Class

Chassis:

  • Kyosho Mini-Z Racer MR01, MR015, MR02, MR03, MR04, MRC MR01
  • PNR2.5W
  • AE SR27
  • 90mm-98mm wheel base only.

Body:

  • Kyosho Mini-Z
  • PN C9
  • TRP Scale
  • Jomurema GT01,
  • GL 488 Lambo,
  • Silver Horse R8 body
  • LeMans body NOT allowed
  • Full windshield and window must be installed, except for clearance,
  • Lexan window and Lexan Roof allowed.

Motor:

  • Any 15mm can 3500Kv senseless motor (Max Kv 3800)

Fixed Gear ratio:

  • 64 Pitch 16 Pinion (416416WC Blue, 426416WC Blue, MR2716WC Blue)
  • 53T Spur Gear (MR2953WC Yellow or MR2055-T53WC Yellow) ONLY.

ESC:

  • Kyosho ASF VE VE Pro MR03S RWD
  • EVO, PN 16A ESC (500807 and 500807A).
  • Gyro and Receiver build in Gyro is not allowed.

Battery:

  • Cars must be powered by four AAA batteries. Alkaline, Ni-MH or Ni-Cd batteries may be used.
  • No other type of battery may be used. For example: Lithium Polymer may not be used.
  • Additional battery for transponder allowed.

Option Parts:

  • Any aftermarket brand Mini-Z production parts allowed
  • Any homemade parts, 3D print option parts and prototype parts not allowed
  • Allowed 3D Print Transponder Holder, Body Side Clips, ESC Top Cover allowed.

Wheel:

  • All brand Plastic and Aluminum Mini-Z production wheel rims are allowed.
  • Maximum front wheel width is 8.5mm.
  • Maximum rear wheel width is 11mm.
  • Maximum wheel diameter is 20mm.
  • All wheel rims must be original design made for Mini-Z RACER
  • Any modification is not allowed
  • Any slot-car design wheel and 3D print wheel not allowed.

Tire:

  • Any Brand of Rubber Mini-Z production tire ONLY.
  • Homemade tires, Foam tires, Silicon tires, Urethane tires, Ethyl Carbamate tires NOT allowed.
  • No tire insert use.
  • Traction compounds NOT allowed on tire or on race surface.
  • Tire warmers are allowed.
  • Tires may be cleaned with a 70% alcohol solution.
  • If a driver uses tire cleaner that has been deemed illegal, the driver will be subject to any penalties that apply.
  • Please address any questions concerning tire cleaners at the drivers meeting.

Minimum Weight:

  • Whole car with everything 160g.


Formula 1 Class

Chassis:

  • Any solid axle 1:28 scale Formula 1 specific chassis or conversion.

Body:

  • Any lexan, Plastic, or 3D printed bodies, wings and bumpers are allowed.
  • Front bumper bearings and Tamiya Mini 4WD style rollers on front bumpers are allowed and encouraged.
  • Roller or bearing outside width not to exceed more than 2mm beyond outside edge of front wheels. (any brand roller or bearing setup falling under this guideline allowed)
  • Rollers recommended specifically for PN 2.5 Bumper but can also be used on almost all other cars: Tamiya Part # 15381 (16mm diameter ones are the correct fit)

Motor:

  • Any brand sensored or sensorless 1:28 scale 2500Kv motor (max Kv 2850)

Fixed Gear ratio

  • 64 Pitch 12 Pinion (416412WC Green or 426412WC Green)
  • 53T Spur Gear (MR2953WC Yellow or MR2055-T53WC Yellow)

ESC:

  • OPEN any Sensored or Sensorless ESC.
  • Gyro and Receiver build in Gyro is not allowed.

Battery:

  • 2S Li-Po battery.
  • Additional battery for transponder allowed.

Wheel:

  • Wheel widths must be 14mm Rear / 11mm Front
  • Wheel diameter front or rear can be either 20mm or 19mm
  • All styles of wheels allowed, including flanged, non-flanged, and wheels using discs (discs ARE allowed), GL style F1 .

Tire:

  • Any Brand of Rubber Mini-Z production tire ONLY. Including tires made for GL style F1 wheels.
  • Homemade tires, Foam tires, Silicon tires, Urethane tires, Ethyl Carbamate tires NOT allowed.
  • No tire insert use.
  • Traction compounds NOTallowed on tire or on race surface.
  • Tire warmers are allowed.
  • Tires may be cleaned with a 70% alcohol solution.
  • If a driver uses tire cleaner that has been deemed illegal, the driver will be subject to any penalties that apply.
  • Please address any questions concerning tire cleaners at the drivers meeting.

Minimum Weight:

  • Whole car with everything 140g


2500 Super Stock Class

Chassis:

  • Any manufacturer solid axle 2wd 1/28 scale chassis.
  • GT Body 90mm-98mm wheel base only. LM Body 102mm wheel base only.

Body:

  • Kyosho Mini-Z, PN C9, TRP Scale and Jomurema GT01, GL 488 Lambo R8 911, Silver Horse Audi-R8 Sauber body only.
  • Full windshield and window must be installed, except for clearance.
  • Lexan window and Lexan Roof allowed.

Motor:

  • Any brand sensored or sensorless 1:28 scale 2500Kv motor (Max Kv 2850)

Gearing:

  • Fixed Gear ratio 64 Pitch 14 Pinion (416414WC or 426414WC Red or MR2714WC Brown) / 53T
  • Spur Gear (MR2953WC Yellow or MR2055-T53WC Yellow) ONLY.

ESC:

  • OPEN any Sensored or Sensorless ESC.
  • Gyro and Receiver build in Gyro is not allowed.

Battery:

  • 2S Li-Po battery
  • Additional battery for transponder allowed.

Wheel:

  • All brand Plastic and Aluminum Mini-Z production wheel rims are allowed.
  • Maximum front wheel width is 8.5mm.
  • Maximum rear wheel width is 11mm.
  • Maximum wheel diameter is 20mm.
  • All wheel rims must be original design made for Mini-Z RACER.
  • Any modification is not allowed.
  • Any slot-car design wheel and 3D print wheel not allowed.

Tire:

  • Any Brand of Rubber Mini-Z production tire ONLY.
  • Homemade tires, Foam tires, Silicon tires, Urethane tires, Ethyl Carbamate tires NOT allowed.
  • No tire insert use.
  • Traction compounds NOT allowed on tire or on race surface.
  • Tire warmers are allowed.
  • Tires may be cleaned with a 70% alcohol solution.
  • If a driver uses tire cleaner that has been deemed illegal, the driver will be subject to any penalties that apply.
  • Please address any questions concerning tire cleaners at the drivers meeting.

Minimum Weight:

  • Whole car with everything 160g.

Lexan 3500 Open Class

Chassis:

  • Any manufacturer solid axle 2wd 1/28 scale chassis.
  • 94mm-98mm Wheel Base ONLY,
  • No weight limit.

Approved Lexan Body:

  • Any GT, TC, and LMP style all Lexan bodies
  • Pan Car Bodies not allowed

Motor:

  • Any 1:28 scale 3500Kv motor (3800 Max Kv)

Gearing:

  • Open Gearing

ESC:

  • Open any ESC Sensored or Sensorless.
  • Gyro and Receiver build in Gyro is not allowed.

Battery:

  • 2S Li-Po battery.
  • Additional battery for transponder allowed.

Wheel:

  • All brand Plastic and Aluminum rims are allowed.
  • Maximum front wheel width is 11mm.
  • Maximum rear wheel width is 14mm.
  • Maximum wheel diameter is 20mm.
  • All wheel rims must be original design made for Mini-Z RACER.
  • Any modification is not allowed.
  • Any slot-car design wheel and 3D print wheel NOT allowed.

Tire:

  • Any Brand of Rubber Mini-Z production tire ONLY.
  • Homemade tires, Foam tires, Silicon tires, Urethane tires, Ethyl Carbamate tires NOT allowed.
  • No tire insert use.
  • Traction compounds NOT allowed on tire or on race surface.
  • Tire warmers are allowed.
  • Tires may be cleaned with a 70% alcohol solution.
  • If a driver uses tire cleaner that has been deemed illegal, the driver will be subject to any penalties that apply.
  • Please address any questions concerning tire cleaners at the drivers meeting.

Minimum Weight:

  • No minimum weight limit.

 

Kyosho EVO Class

Chassis:

  • Any Kyosho 2WD EVO chassis.
  • GT Body 90mm-98mm wheel base only. LM Body 102mm wheel base only.

Body:

  • Kyosho Mini-Z, PN C9, TRP Scale and Jomurema GT01, GL 488 Lambo R8 911,
  • Full windshield and window must be installed, except for clearance.
  • Lexan window and Lexan Roof allowed.

Motor:

  • ONLY Kyosho 5600 Brushless, sensored & sensorless both allowed.

Gearing:

  • Kyosho 44 tooth Spur ball diff & Kyosho 9t or PN 9 Tooth (Kyosho Pitch) pinions only

ESC:

  • Any Kyosho EVO board, no modifications to the board allowed.
  • ICS programing  allowed.
  • Gyro and Receiver build in Gyro is not allowed.

Battery:

  • AAA Nimh only.
  • Additional battery for transponder allowed.

Wheel:

  • All brand Plastic and Aluminum Mini-Z production wheel rims are allowed.
  • Maximum front wheel width is 8.5mm.
  • Maximum rear wheel width is 11mm.
  • Maximum wheel diameter is 20mm.
  • All wheel rims must be original design made for Mini-Z RACER.
  • Any modification is not allowed.
  • Any slot-car design wheel and 3D print wheel not allowed.

Tire:

  • Any Brand of Rubber Mini-Z production tire ONLY.
  • Homemade tires, Foam tires, Silicon tires, Urethane tires, Ethyl Carbamate tires NOT allowed.
  • No tire insert use.
  • Traction compounds NOT allowed on tire or on race surface.
  • Tire warmers are allowed.
  • Tires may be cleaned with a 70% alcohol solution.
  • If a driver uses tire cleaner that has been deemed illegal, the driver will be subject to any penalties that apply.
  • Please address any questions concerning tire cleaners at the drivers meeting.

Minimum Weight:

  • Whole car with everything 160g.