Race Classes
(updated 2026.07.01)

Class Rep: Seth Miller

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. Novice drivers learn good sportsmanship, such as not intentionally causing crashes. 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
Kyosho brand metal 0 degree steering knuckles (for durability reasons)
Bearing Set
Front Spring Set
Any Kyosho T plate

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
No wheels with FLANGES or DISCS are permitted

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, 3d printed or no rear wing is allowed.

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: Nathan Montemayor

Intent:
This class will serve as an entry level LiPo class, a stepping stone for those who want to progress from box stock and move on to a LiPo based chassis.  If you are competitive in other LiPo based classes, please consider a more advanced class.

We recommend using the spec motor (nhx 2500 sensored) and ESC (NHX, Rocket Kiwami), but we will allow any 2500 motor that is within spec (under 2800Kv) and any sensored ESC in blinky mode.

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 and penalties may be imposed.

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

ESC:
Any sensored ESC will be allowed, recommend 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:
Any 2500kv Sensored (NHX recommended)
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.

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 spur gear and 10T pinion
Tooth count must be distinguishable by markings or color for easy tech. We highly recommend using yellow spurs and PN 10T (yellow) pinions.  If you don't have the yellow one, regular black ones will be allowed, double check to make sure its 10t/53t.

Body:
Any manufactured molded hard shell that fits the allowed wheelbases. All parts must be the original for that body. Bodies may be modified to ensure proper fit (wheel wells, etc). Side clips, if used, are considered part of the body.
Lexan window, roof and/or 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.

Minimum weight: 26g

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: Michael Hull, alternate to be determined

Intent:
Class is 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 and demonstrate a skill level necessary to participate in the class. This jump will be allowed at the discretion of the class representative(s) based on observation and input from more advanced drivers.

Cars will be periodically teched to ensure a level playing field. If a car is faster than the rest of the field due to superior performance of spec components or manipulation of such, reasonable action will be taken to remedy any disparities in performance.

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

ESC:
Any Sensored ESC not known to have built-in timing (Atomic, M Radon not allowed)
(ESC MUST BE IN BLINKY MODE, SENSOR WIRE MUST BE CONNECTED - NO BOOST, NO TIMING,
NO GYRO)

Motor:
Houston RC HRC2500KV
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. 12t pinion
Tooth count must be distinguishable by markings or color for easy tech.

Note: Pinion size to be determined prior to start of each point series

Body:
Any manufactured molded hard shell 98mm wheelbase body. All parts must be the original for that body (aftermarket plastic and Lexan wings allowed).
Limited wheel and ground clearance modifications are allowed. Side clips, if used, are considered part of the body with respect to total body weight.
Minimum weight: 26g.
Original rear wings for corresponding hard-shell body may be used with no height limit.
Aftermarket plastic and Lexan wings are allowed but must be no higher than 45mm from the ground.
Lexan roofs are allowed.

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 and all mold flashing has been sanded smooth so that we do not damage the track surfac

Tires:

Any production rubber Mini-Z tires

NO SILICON, NO FOAM

Maximum tire diameter (mounted): 25.5mm

Weight:
Min.Weight 160g

Class Rep: Michael Hull, alternate to be determined

Intent:
Class is 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 and demonstrate a skill level necessary to participate in the class. This jump will be allowed at the discretion of the class representative(s) based on observation and input from more advanced drivers.

Cars will be periodically teched to ensure a level playing field. If a car is faster than the rest of the field due to superior performance of spec components or manipulation of such, reasonable action will be taken to remedy any disparities in performance.

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

ESC:
Any Sensored ESC not known to have built-in timing (Atomic, M Radon not allowed)
(ESC MUST BE IN BLINKY MODE, SENSOR WIRE MUST BE CONNECTED - NO BOOST, NO TIMING, NO GYRO)

Motor:
Houston RC HRC2500KV
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. 12t pinion
Tooth count must be distinguishable by markings or color for easy tech.

Note: Pinion size to be determined prior to start of each point 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 46mm 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 and all mold flashing has been sanded smooth 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: 150 Gram Minimum Weight (track-ready)

Class Rep: Clint

Intent
Promote and enjoy open wheeled F1 racing at MMRC through a revised SPEC F1 class.  This replaces the existing MMRC F1 class and 28SRA F1 class at the club.

The reality for this class to run consistently will require the need to accommodate a wide range of driver skills in a single heat.  Coupled with general open wheeled racing, it should be assumed there will be a higher rate of racing incidents.

Cleaner, consistent laps are paramount at all skill levels.  Consider the following:

• Those needing better consistency/drivability are encouraged to reduce speed by dropping a pinion tooth.  As skill increases, so should your speed.

• Skilled drivers will be required to drive around, not through traffic.  Consider slowing to match if you can’t increase track awareness.

If / when the class grows, opportunity to split heats based on historical lap counts should be encouraged but only as the numbers approach a viable reason per club racing format.

Chassis:
Any F1 open-wheeled designed kit with wheelbase of 112mm – 116mm.
Currently includes: GL Racing GLF-1, G-Force Formula, PNR 3.0F1, MWX R1F1, Atomic SF-F1 conversion, Reflex FX28, Xbility XB-F1
Inclusion of additional chassis can be decided by the racing participants and/or class rep.

ESC:
Any Sensored ESC not known to have built-in timing (Atomic, M Radon not allowed)
(ESC MUST BE IN BLINKY MODE, SENSOR WIRE MUST BE CONNECTED - NO BOOST, NO TIMING,
NO GYRO)

Motor:
Houston HRC 2500KV Sensored preferred.
NHX RC 2500kv Sensored #NHX3010 if it's been tested and verified it's under 2800kv. 
Max KV 2800 @ 8.4v

Gearing:
53T/12T
Pinion size will be decided by the class rep prior to a series start.
Those needing a slower car to increase consistency/drivability are encouraged to use a lower gear.  As skill increases so should your pinion, this is not a tuning option.

Battery:
Li-HV Maximum voltage 8.4v.

For fairness and safety, battery temp is limited to no higher than 5º above ambient room temp

Body:
Lexan F1 Bodies only
Aftermarket front and rear wings allowed (must look like an F1 wing)
Bearings in the front wing are allowed

Wheels:
All brand plastic and aluminum 1/28 scale production wheels allowed

Size specifications:
Front-wheel width: 11mm
Rear-wheel width: 14mm (not including outer flange/disk)
Maximum wheel diameter: 20mm
Minimum wheel diameter: 19mm
Wheels must be original designs made for 1/28 scale cars

Tires:
Front tires must be 11mm and rear tires 14mm wide
Maximum mounted rear tire diameter 25.5mm
Any production rubber Mini-Z tires

NO SILICON, NO FOAM

Weight:
Minimum weight: 140 grams (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 is in development through the summer of 2026!

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

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)