Race Classes
(updated 2025.8.14)

Class Rep: Andy Zuhlke

Intent: This is where it all begins for Mini-Z racing. No experience is necessary. Costs are kept as low as possible. Tuning is simplified with only a handful of critical upgrades allowed. Experienced drivers are always welcome, but advanced tuners may consider moving up into another class.

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Chassis:
Mini Z with any radio supporting the box stock receiver. 98mm wheelbase is highly recommended

Body:
Hard body with lights and hard plastic windshield installed. Stock rear wing.

Motor/Pinion:
White end bell motor with 6t pinion and stock spur gear

Upgrades
Bearing Set
Front Spring Set
Any Kyosho T plate
You may flip the king pins (highly encouraged actually)

Batteries:
4 cell NIMH

Tires:
Any brand 8.5mm wide front, 11mm wide rear. Any rubber RCP use tire. No Foam. No Silicon.

Wheels:
Any brand that fits standard Mini Z RWD

Note: Depending on skill, the Race Director/club might suggest running in a "novice" heat as you start to get comfortable being on the track with others.

If you are completely new to Mini-Z, then we suggest jumping into our "Getting Into Mini-Z Racing" guide with helpful links for items and tips as you start to race. 

Class Rep: Andy Abram

Intent: This class is intended for skilled drivers to showcase their racing abilities with other drivers with similar abilities. Therefore, racers who wish to compete in this class must demonstrate driving skills through qualifiers. To qualify one must run a pre-determined number of laps within 5 minutes with 2 or more racers in the class. The number of pre-determined laps will change every time the track layout does. Once you have qualified you are in for good. If you are not qualified yet, ask to have a qualifier set up and we will get you on the track. This can be done anytime (not just on race night) when there are 2 or more qualified racers available.

This class is the next logical step for a racer who feels they are ready to jump to the next level from Kyosho Box Stock.

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Chassis:
Kyosho MR-03/MR-04 EVO
Narrow or wide front end
90mm-102mm wheelbase

Electronics: 

Any radio
Open ICS settings

Motor:  

Brushless 4100kv (greeen) Kyosho only 

No brushed equivalent 

Gearing limit:

44/8 fixed gearing 

Differential:

KYOSHO ONLY gear or ball diff allowed

Battery:

4xAAA NiMh batteries

Body:

AUTOSCALE PREFERRED 

Any real-world makes and models/ no Jomerema type bodies

Nicely painted white bodies with all pieces/windows installed. Keep the class classy 😉

Body reinforcement and bumpers allowed

Tire or ground clearance issues may be addressed

Front splitters may be ROUNDED not removed

No grinding or shaving or drilling for weight reduction

Wing:

Lexan rear wing is allowed. Wing height no more than 10mm

Wheels:

Any Mini-Z type wheels, plastic or aluminum
No wheels with FLANGES or DISCS are permitted

Tires:

Rubber tire of any company, no silicone or foam

Performance option parts: 

Fixed lower front arm as in Box Stock/ No double A Arm allowed

Any Kyosho/R246 part that will fit on a stock Kyosho chassis without modification to the chassis itself

No drilling of extra holes

Only Kyosho/R246 rear pod or damper setups allowed

T-Plates are Kyosho only

Class Rep: Andy Abram

Intent: A skilled drivers class with a very strict set of rules. The body and offsets could periodically change from series to series. This is a mostly Kyosho/R246 parts only class.

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Chassis:
MR-03 EVO 94mm
MR-04 EVO 94mm

Electronics: 

Any radio
Open ICS settings

Motor:  

4100KV Brushless/Sensored only

Gearing limit:

44/8 fixed gearing 

Differential:

KYOSHO ONLY gear or ball diff allowed

Battery:

4xAAA NiMh batteries

Body:

Kyosho Nissan SKYLINE 2000-GT-R

No BS meaning drilling/grinding/shaving for weight reduction

Tire clearance can be addressed within reason

Wheels:

Narrow front and rear ONLY

No flanges or discs

0/-1 offset only

Tires:

KYOSHO ONLY!

Performance option parts: 

All performance parts to be Kyosho/R246 (Repeat that to yourself)

Class Rep: Clint Thayer / Ian Sadkovich

Intent:
Create an interest group of individuals that have a desire to build, tune, and race the unique multi length (90/94/98/102mm) MRT-EVO kit in an open, friendly environment.  Drivers should have some experience with lipo based kits.

Maintaining a fair competition and race pace allowing high consistency runs over fast lap. If you are driving this class to beat someone or get fast lap, your in the wrong class.  Should someone find mechanical speed through equipment manipulation, new equipment, or race prep (including battery charging) resulting in faster than field or historical lap times, we will take reasonable action to remedy the situation. 

Initial runs of this class will lean towards research and development. Expect minor modifications.

Need help with part selection?  Here is a good resource!
Need to connet with other drivers in this class?  MMRC Slack channel

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Chassis: 

Atomic MRT-EVO Chassis
Wheelbase will be determined prior to the start of every series.
Can include 90/94/98/102mm wheelbase

Upgrades:
Any Atomic upgrade parts are allowed

ESC:
NHX RC Mini 28 Pro, Rocket RC Mini 28 Pro, Rocket RC Kiwami
(ESC MUST BE IN BLINKY MODE - NO BOOST, NO TIMING)


Motor:
NHX RC 2500kv Sensored #NHX3010
Max kv is 2800 measured by HobbyWing Motor analyzer (with sensor wire)
No tampering allowed.

Note: Motor will be determined prior to the beginning of each series.  

Battery:
2S Li-Po. (maximum 8.4v) 

Gearing:
35T Spur (stock), 28T Pinion

Note: Pinion will be determined prior to the beginning of each series.  

Body:
Any manufactured molded Autoscale hard shell (Kyosho, GL, SilverHorse) that fits the allowed wheelbase.
All parts must be the original for that body.
Limited wheel and ground clearance modifications are allowed.
Lexan roofs, windows, and wings are NOT allowed.
Aftermarket plastic wings are allowed.
102mm wheelbase can use a lemans based hard body.


Note: This front is considered narrow so some 102mm applications might need advanced tuning

Wheel:
20mm max diameter, both front and rear
8.5mm max width front
11mm max width rear

Tires:
Any production rubber Mini-Z tires
NO SILICON, NO FOAM

Weight: None

Class Rep: Ian Sadkovich, Nathan Montemayor

Intent:
Create race classes for those looking to build, tune and race lipo-based cars with an emphasis on fair competition and consistent laps - if you’re looking to do fast laps, these classes aren’t for you. 

Spec motor and ESC with minimum rule changes so that people can focus on driving and tuning and not have to keep buying the latest and greatest kits and equipment.

Classes are intended for drivers of moderate to advanced abilities. Those looking to make the jump from AAA cars are welcome. However, they should have some experience with lipo based kits.

Cars will be periodically teched to ensure a level playing field. If a car is faster than the rest due to equipment or manipulation of said equipment, we will take reasonable action to remedy the situation.

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Chassis:
1/28 rear 2WD solid axle, aka “live axle”
98mm & 102mm wheelbase

ESC:
NHX RC Mini 28 Pro, Rocket RC Mini 28 Pro, Rocket RC Kiwami
(ESC MUST BE IN BLINKY MODE - NO BOOST, NO TIMING)
NO GYRO

Motor:
NHX RC 2500kv Sensored (NHX3010)
Maximum Kv: 2800
Motors must be in the same physical and default specification as when purchased and cannot be tampered with or modified. No swapping of bearings, sensor board, end bells or rotors.
Motors must be teched before being allowed to race (pending)

Note: Should a motor be demonstrably faster than the rest of the field, we will take reasonable action to remedy the situation, to maintain fair competition and race pace.

Battery:
2S Li-Po (maximum 8.4v) 

Note: HV packs are allowed but cannot be charged higher than 8.4v

Gearing:
53T fixed gearing. 10T or 12t pinion
Tooth count must be distinguishable by markings or color for easy tech. We highly recommend using yellow spurs and PN 10T (orange) or 12T (green) pinions.

Note: The pinion size will be determined prior to the beginning of the series. 

Body:
Any manufactured molded hard shell that fits the allowed wheelbases. All parts must be the original for that body. Limited wheel and ground clearance modifications are allowed. Side clips, if used, are considered part of the body.
Minimum weight: 26g
Lexan roofs, windows, and wings are allowed.
Standard rear wings for corresponding hard-shell body may be used with no height limit
Aftermarket plastic wings are allowed and must be no higher than 45mm from the ground
Cars with a 102mm wheelbase can use a lemans based hard body.

Wheel:

20mm max diameter, both front and rear

8.5mm max width front

11mm max width rear

Flange and disc wheels are allowed as long as the diameter is not larger than that of the tire so that we do not damage the track surface. 

Tires:

Any production rubber Mini-Z tires

NO SILICON, NO FOAM

Maximum tire diameter (mounted): 25.5mm

Weight:
Min.Weight 160g

Class Rep: Ian Sadkovich, Nathan Montemayor

Intent:
Create race classes for those looking to build, tune and race lipo-based cars with an emphasis on fair competition and consistent laps - if you’re looking to do fast laps, these classes aren’t for you. 

Spec motor and ESC with minimum rule changes so that people can focus on driving and tuning and not have to keep buying the latest and greatest kits and equipment.

Classes are intended for drivers of moderate to advanced abilities. Those looking to make the jump from AAA cars are welcome. However, they should have some experience with lipo based kits.

Cars will be periodically teched to ensure a level playing field. If a car is faster than the rest due to equipment or manipulation of said equipment, we will take reasonable action to remedy the situation.

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Chassis:
1/28 rear 2WD solid axle, aka “live axle”
98mm & 102mm wheelbase

ESC:
NHX RC Mini 28 Pro, Rocket RC Mini 28 Pro, Rocket RC Kiwami
ESC MUST BE IN BLINKY MODE - NO BOOST, NO TIMING)
NO GYRO

Motor:

NHX RC 2500kv Sensored (NHX3010)
Maximum Kv: 2800
Motors must be in the same physical and default specification as when purchased and cannot be tampered with or modified. No swapping of bearings, sensor board, end bells or rotors.
Motors must be tech'ed before being allowed to race (pending)

Note: Should a motor be demonstrably faster than the rest of the field, we will take reasonable action to remedy the situation, to maintain fair competition and race pace.

Battery:
2S Li-Po (maximum 8.4v) 

Note: HV packs are allowed but cannot be charged higher than 8.4v

Gearing:
53T fixed gearing. 10T or 12t pinion
Tooth count must be distinguishable by markings or color for easy tech. We highly recommend using yellow spurs and PN 10T (orange) or 12T (green) pinions.

Note: The pinion size will be determined prior to the beginning of the series. 

Body:
Any lexan body, light (0.5mm) or standard (0.7mm) weight
NO PANCAR – aka “wedge” or “doorstop” bodies
NO HARD BODIES
Wings must be no higher than 45mm from the ground

Note: Reps can choose to disallow a body if it provides an unfair advantage and is demonstrably faster than the rest of the field. 

Wheel:
20mm max diameter, both front and rear
8.5mm max width front
11mm max width rear
Flange and disc wheels are allowed as long as the diameter is not larger than that of the tire so that we do not damage the track surface. 

Tires:
Any production rubber Mini-Z tires
NO SILICON, NO FOAM
Maximum tire diameter (mounted): 25.5mm

Weight: No minimum weight

Class Rep: Michael Hull

Intent:
This is a limited equipment exploration class to provide intermediate to advanced drivers an opportunity in the testing of new/alternate equipment. This class was started by a group wishing to test/use LiHV cells charged to the full 8.7 peak voltage. The goal is not to increase speed but to simply use these cells, which now dominate the market, at their full capacity. With the increase of 0.3v, 53T/10T fixed gearing was chosen to keep speeds at a more moderate pace. The resulting combination of HV 8.7v / 10T pinion yields speeds comparable to LiPo 8.4v / 11T pinion, a comfortable middle ground. The plan, for the foreseeable future, is to remain at 53T/10T fixed gearing regardless of track configuration.

The next trial for this class will be a comparison between the NHX 2500 sensored motors and the Houston HRC 2500 sensored motors with the goal of coming to a group consensus as to which, if either, is most consistent in performance. Once enough information is gathered, and the participants are ready, a decision will be made by majority vote among participants. Participants will decide if one motor will be eliminated from the class or, if it is found that performance of the two is close enough, they both may remain allowed.

After a decision is made on the motor/motors to be allowed, the Hacktronic Zigma ESC will be introduced as a test of performance against the NHX RC Mini 28 Pro, Rocket RC Mini 28 Pro and Rocket RC Kiwami ESCs. After a sufficient amount of information on performance is gathered, a decision will be made on whether the Hacktronic ESC will remain allowed and participants will then decide what equipment, if any, the class will explore moving forward.

Motors must be in the same physical and default specification as when purchased and cannot be tampered with or modified. No swapping of bearings, sensor board, end bells or rotors. Motors must be tech'ed before being allowed to race (pending)

This class is under development and the beginning, length and finalization of a given trial of equipment will be decided by participants as to what is most appropriate in regard to any simultaneously running point series.

With good management and group participation to help keep car performance levels, outside of any given equipment being tested, as closely matched as possible, this has the potential to be an enjoyable and rewarding class.

Note: Should a motor be demonstrably faster than the rest of the field, we will take reasonable action to remedy the situation, to maintain fair competition and race pace.

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Chassis:
1/28 rear 2WD solid axle, aka “live axle” (no independent rear suspension)
98mm wheelbase

ESC:
NHX RC Mini 28 Pro, Rocket RC Mini 28 Pro, Rocket RC Kiwami
(ESC MUST BE IN BLINKY MODE - NO BOOST, NO TIMING)
NO GYRO, no receivers with built in gyro.

Motor:
NHX RC 2500kv Sensored #NHX3010
Houston HRC 2500KV Sensored
Max KV 2800 @ 8.4v

Gearing:
53T/10T fixed gearing.
Pinion: PN Aluminum 10T (orange) or PN Delrin (yellow) preferred for easier tech. Yellow 53T spur will also be preferred if one is available for your choice of differential.

Battery:
Li-HV Maximum voltage 8.7v.
For fairness and safety, battery temp is limited to no higher than 5º above ambient room temp

Body:
Any GT/Sedan type Lexan body, light or standard weight
NO PANCAR – aka “wedge” or “doorstop” bodies
NO HARD BODIES
Maximum wing height from the track is 45mm

Wheels:
20mm max diameter, both front and rear, with a maximum mounted rear tire diameter of 25.5mm
8.5mm max width front
11mm max width rear
Flange and disc wheels are allowed. Must be maintained with a smooth edge and may not exceed tire diameter.

Tires:
Maximum mounted rear tire diameter 25.5mm
Any production rubber Mini-Z tires
NO SILICON, NO FOAM

Weight:
150 Gram Minimum Weight (track-ready)

Class Rep: Michael Hull

Intent: TBD

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Chassis:
Open any RWD chassis ONLY, 94mm-102mm Wheel Base ONLY

Motor:
2500kv Sensored

ESC:
BLINKY ESC, Open Gearing,  Sensored ESC (must use physical cable)

Battery:
2S Li-Po battery Maximum Voltage 8.7V. Additional battery for transponder allowed. Option Parts: Open any parts allowed (including homemade parts, 3D print parts and prototype parts). 

Body:
NO LMP Bodies, Must Be Pan Car Wedge Type Body. NO Additional Wings Higher the Sides of Body. (If car is upside down WING SHOULD NOT BE TOUCHING)

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. 

Class Rep: Clint Thayer / John Higgins

Intent: Most F1 drivers are phasing to 28SA F1.  TBD if this class continues.

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Drivetrain: RWD

Body: GL Lexan body, kit rear wing, aftermarket front wings with rollers allowed

Chassis: GL GLF1, 114mm wheelbase

Electronics: Hobbywing Mini28, no boost, no turbo and blinking

Motor: HRC 2500KV Sensored motor

Gearing: 53/10

Battery: 8.4V charging limit on a 2S lipo battery

Wheels and Tires: GL wheels and the tires from GL and Marka designed to fit them

Class Rep: Clint Thayer / Ian Sadkovich

Intent: TBD

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Chassis:
1/28 AWD chassis
98 & 102mm wheelbase
Possible options include: Kyosho MA010, MA015, MA020 and MA030, Atomic BZ and SZ, GL Racing GLA, GLA Giulia (with/without Reflex conversion), RTB

ESC:
Open (Sensored wire required)
Must be in, and show blinky mode (no timing/boost)

Motor:
3500kv motor (Maximum Kv 3800)

Battery:
2S lipo battery 8.4V charging limit

Gearing:
Open

Body:
Any lexan body, light or standard weight No Pancar (“wedge” or “doorstop” bodies) No hard bodies

Wheel:
20mm max diameter, both front and rear

Tires:
Any production rubber Mini-Z tires No silicon, no foam

Weight:
No minimum weight limit