IAM-RC RACEWAY
Mini-Z & 1/28 Scale Racing Class Rules
Choose a racing class to review its chassis, motor, gearing, tires, body and other requirements. (Proposed rules for Winter Cup. Subject to change driven by club feedback.)
Super AAA
Chassis
• Kyosho Based AAA RWD chassis
(PN 2.5W allowed)
Wheelbase
• 86mm-106mm
Motor
- Kyosho X-Speed brushed motor
- PN Racing 70t brushed motor
ESC
• MR-04/MR-03 or MR-04 EVOll or
MR-03 RVO brushed only
Battery
• Any AAA NIMH cells 4.8vdc max
Body
- Any hard plastic body designed or
3d printed for 1/28 scale. - Must be complete.
- No missing headlight lens or windows.
- Chassis and Body wheel base must match.
- lexan roof allowed
Drivetrain
• Any
Wheels
- Any
- Wheel with tire must not protrude from body
Tires
- Any Brand of Rubber Mini-Z
- production tire ONLY.
- Traction compounds NOT allowed on tire or on race surface
Modifications
• Any
Minimum Weight
• 160g
Transmitter
• Any radio
Kyosho Box Stock
CHASSIS
Kyosho MR-04 Readyset RWD or Team Associated SR27 RTR RWD only.
WHEELBASE
86–106mm. Chassis and body wheelbases must match.
MOTOR
Stock motor supplied with the respective Kyosho MR-04 or Team Associated SR27 RTR chassis.
ESC
Stock RTR electronics only. The original ESC/electronics for the respective chassis must be retained.
BATTERY
Kyosho Speed House AAA NiMH cells only.
BODY
Any complete hard-plastic body designed or 3D-printed for 1/28 scale.
The body must remain intact. Headlight lenses and windows may not be removed or omitted. Chassis and body wheelbases must match.
DRIVETRAIN & GEARING
Stock gear differential only. Ball differentials are prohibited.
6T–9T pinion only.
WHEELS
Any Kyosho wheels. Wheels may not protrude beyond the body.
TIRES
Kyosho tires only.
PERMITTED MODIFICATIONS
T-plate, alloy wheel nuts, Kyosho front bumper set, and 0° alloy front knuckles for durability only.
No other modifications are permitted.
Open Class
CHASSIS
Any 1/28-scale chassis.
WHEELBASE
86–106mm.
MOTOR
Any motor.
ESC
Any ESC.
BATTERY
Maximum 8.45 VDC.
BODY
Any complete Lexan body designed for 1/28 scale.
The body must remain intact. Headlight lenses and windows may not be removed.
DRIVETRAIN
Any drivetrain.
WHEELS
Any wheels. Wheels may not protrude beyond the body when viewed from above.
TIRES
Commercially produced rubber Mini-Z/1/28-scale tires only. Foam tires and traction additives are prohibited.
MINIMUM WEIGHT
None.
TRANSMITTER
Any radio system.
Kyosho Novice Box Stock (Training Mode)
CHASSIS
Kyosho MR-04 Readyset RWD or Team Associated SR27 RTR RWD only.
WHEELBASE
86–106mm. Chassis and body wheelbases must match.
MOTOR
Stock Kyosho MR-04 motor or stock Team Associated SR27 RTR motor only.
ESC
Stock RTR electronics only. The original brushed ESC/electronics for the respective chassis must be retained.
BATTERY
Kyosho Speed House AAA NiMH cells only.
BODY
Kyosho hard-plastic body only.
DRIVETRAIN & GEARING
Stock gear differential only. Ball differentials are prohibited.
6T pinion only.
WHEELS
Kyosho wheels only. Wheels may not protrude beyond the body.
TIRES
Kyosho tires only.
PERMITTED MODIFICATIONS
T-plate, alloy wheel nuts, Kyosho front bumper set, and 0° alloy front knuckles for durability only.
No other modifications are permitted.
MINIMUM WEIGHT
None.
TRANSMITTER
Stock kit transmitter only.
NOVICE ELIGIBILITY
Drivers finishing 1st, 2nd, or 3rd overall in the Novice championship standings during a season are no longer eligible to compete in Novice Class in future seasons.
3500kV AWD
CHASSIS
Any 1/28-scale AWD chassis.
WHEELBASE
86–106mm.
MOTOR
3500kV class motor. Maximum allowable motor rating: 3950kV.
ESC
Any sensored ESC.
BATTERY
Maximum 8.45 VDC.
BODY
Any Lexan body designed for 1/28-scale racing.
DRIVETRAIN & GEARING
AWD only.
Any gearing.
WHEELS
Any wheels. Wheels may not protrude beyond the body when viewed from above.
TIRES
Commercially produced rubber Mini-Z/1/28-scale tires only. Foam tires and traction compounds are prohibited.
MINIMUM WEIGHT
None.
TRANSMITTER
Any radio system.
3500kV RWD
CHASSIS
Any 1/28-scale RWD chassis.
WHEELBASE
86–106mm.
MOTOR
3500kV class motor. Maximum allowable motor rating: 3950kV.
ESC
Any sensored ESC.
BATTERY
Maximum 8.45 VDC.
BODY
Any Lexan body designed for 1/28 scale. Pan-car and LM-style bodies are not permitted.
DRIVETRAIN & GEARING
RWD only.
Fixed 64-pitch gearing: 12T pinion / 53T spur gear.
Recommended: yellow 53T spur gear and green 12T pinion.
WHEELS
Any wheels. Wheels may not protrude beyond the body when viewed from above.
TIRES
Commercially produced rubber Mini-Z/1/28-scale tires only. Foam tires and traction compounds are prohibited.
MINIMUM WEIGHT
None.
TRANSMITTER
Any radio system.
Formula 1
CHASSIS
Any aftermarket 1/28-scale Formula 1 chassis.
WHEELBASE
Any.
MOTOR
2500kV class motor. Maximum allowable motor rating: 2950kV.
ESC
Any sensored ESC.
BATTERY
Maximum 8.45 VDC.
BODY
Lexan or 3D-printed Formula 1 body.
DRIVETRAIN & GEARING
Fixed 64-pitch gearing: 12T pinion / 53T spur gear.
Recommended: yellow 53T spur gear and green 12T pinion.
WHEELS
Any wheels.
Maximum front track width: 80mm.
Maximum rear track width: 82mm.
TIRES
Rubber Mini-Z/1/28-scale tires only. Foam tires and traction compounds are prohibited.
MINIMUM WEIGHT
140g, race-ready.
TRANSMITTER
Any radio system.
2500kV Hard Body
CHASSIS
Any 1/28-scale chassis.
WHEELBASE
86–106mm. Chassis wheelbase must match the body.
MOTOR
2500kV class motor. Maximum allowable motor rating: 2950kV.
ESC
Any sensored ESC.
BATTERY
Maximum 8.45 VDC.
BODY
Any complete hard-plastic body designed or 3D-printed for 1/28 scale. The body must remain intact. Headlight lenses and windows may not be removed or omitted. Chassis and body wheelbases must match.
DRIVETRAIN & GEARING
Fixed 64-pitch gearing: 14T pinion / 53T spur gear.
Recommended: yellow 53T spur gear and brown/red 14T pinion.
WHEELS
Any wheels. Wheels may not protrude beyond the body when viewed from above.
TIRES
Commercially produced rubber Mini-Z/1/28-scale tires only. Foam tires and traction compounds are prohibited.
MINIMUM WEIGHT
160g, race-ready.
TRANSMITTER
Any radio system.
2500kV Pan Open
CHASSIS
Any 1/28-scale RWD chassis.
WHEELBASE
86–106mm.
MOTOR
2500kV class motor. Maximum allowable motor rating: 2950kV.
ESC
Any sensored ESC.
BATTERY
Maximum 8.45 VDC.
BODY
Any Lexan pan-car body designed for 1/28-scale racing.
DRIVETRAIN
Any RWD drivetrain.
WHEELS
Any wheels. Wheels may not protrude beyond the body when viewed from above.
TIRES
Commercially produced rubber Mini-Z/1/28-scale tires only. Foam tires are prohibited. No traction additives on tires or the track.
MINIMUM WEIGHT
None.
TRANSMITTER
Any radio system.
Rules are subject to event-specific updates. Please confirm the latest requirements before race day.