1:28 Racing Rules

1:28 Racing Rules for each class are below. We use the Easylap timing system at our track. Please verify your transponder is compatible with this system to ensure your laps are counted. We will not hand count laps. There is only a limited quantity of transponders available to borrow, so please make sure you have transponders for your vehicles.

We run our racing at The Collection Queen Creek at 7303 S Hawes Rd #146, Mesa, AZ 85212.

• Box Stock
• AAA Spec
• AAA 3500
• Lipo 2500
• Lipo 3500 Lexan
• Formula 1
• AWD Modified
• 2WD Modified
• Pan Open
• Euro Truck

CHASSIS

• Allowed: Kyosho MR03S, MR03S2, MR03, MR04, Associated SR27 (RWD only)
• Not Allowed: Shaving chassis or removing sections for weight reduction
• Chassis must be raced as manufactured from the box

WHEELBASE

• Only allowed wheelbases: 90mm, 94mm, 98mm, and 102mm

MOTOR

• Kyosho MZ9P, MZ9E Motor from RTR
• Permitted modifications:
  • Changing motor wires with same or maximum (20) gauge wire
  • Removing safety switch
  • Motor must be run as manufactured with no other manipulations or modifications

GEAR RATIO

• 6T – 9T Pinion (included with RTR kits)
• Stock Kyosho Gear Diff only

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size limitations:
  • Maximum front-wheel width: 8.5mm
  • Maximum rear-wheel width: 11mm (not including outer flange/disk)
  • Maximum wheel diameter: 20mm
  • Minimum wheel diameter: 19mm
• Wheel and tire must fit inside the body

TIRES

• Maximum tire diameter (mounted): 25.5mm
• Front tires must be 8.5mm and rear tires 11mm
• Tires may be cleaned with water only.
• Not Allowed:
  • Traction compound on tire or race surface
  • Tire warmers
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties

BATTERIES

• Cars must be powered by 4 AAA batteries
• Allowed types: Alkaline, Ni-MH, or Ni-Cd
• An additional battery is allowed only for transponder connection
• ELECTRONICS & TRANSMITTER
• Only Kyosho original items included in the box are allowed
• No modifications permitted

BODY

• Any manufactured molded hard shell that fits the allowed wheelbase
• All parts must be original for that body
• Limited wheel and ground clearance modifications allowed
• Shaving/thinning body material for weight reduction is allowed
• Lexan roofs, windows, and wings are allowed
• Size limitations:
• Maximum body length: 180mm
• Maximum width: 80mm
• Headlight requirements:
  • Original headlight covers must be installed
  • Headlight buckets may be removed/omitted
  • Lost headlight covers may be replaced with decal/tape
• Taillights and covers may be removed/omitted
• Small body parts (mirrors, canards, exhausts, front splitters) may be omitted to prevent racing damage
• Wings: Standard rear wings for corresponding hard-shell body may be used with no height limit
• Custom aftermarket plastic wings must meet 45mm height limit from ground

OPTION PARTS

• Allowed from any manufacturer: bearings, wheel nuts, springs, and T-Plates
• Only Kyosho Readyset original front and rear suspension parts may be used
• Front camber/steering knuckles may be swapped to 0° aluminum knuckles
• No added weight via tungsten, brass, or other materials

MODIFICATIONS

• King pin flip allowed, lower pin must be shortened to no damage track

CHASSIS

• 98mm or 102mm wheel base only, Kyosho MR01, MR02, MR03, MR04, SR27 or PN 2.5 chassis

WHEELBASE

• Only allowed wheelbases: 90mm, 94mm, 98mm, and 102mm

MOTOR

• Kyosho MZ9P, MZ9E Motor from RTR, PN 70T motor (#132370)
• Permitted modifications:
  • Changing motor wires with same or maximum (20) gauge wire
  • Removing safety switch

GEAR RATIO

• Open Spur, Open Pinion, Open Diff

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size limitations:
  • Maximum front-wheel width: 8.5mm
  • Maximum rear-wheel width: 11mm (not including outer flange/disk)
  • Maximum wheel diameter: 20mm
  • Minimum wheel diameter: 19mm
• Wheels must be original designs made for 1/28 scale cars
• Wheel and tire must fit inside the body

TIRES

• Maximum tire diameter (mounted): 25.5mm
• Front tires must be 8.5mm and rear tires 11mm
• Tires may be cleaned with water only.
• Not Allowed:
  • Traction compound on tire or race surface
  • Tire warmers
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties
• Direct tire-related questions to the driver’s meeting or race director

BATTERIES

• Cars must be powered by 4 AAA batteries
• Allowed types: Alkaline, Ni-MH, or Ni-Cd
• An additional battery is allowed only for transponder connection

ELECTRONICS & TRANSMITTER

• Any manufacturer remote is allowed
• Any manufacturer ESC and Receiver in the same flat board configuration as the Kyosho EVO board
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

BODY

• Any manufactured molded hard shell that fits the allowed wheelbase
• All parts must be original for that body
• Limited wheel and ground clearance modifications allowed
• Shaving/thinning body material for weight reduction is allowed
• Lexan roofs, windows, and wings are allowed
• Size limitations:
• Maximum body length: 180mm
• Maximum width: 80mm
• Headlight requirements:
  • Original headlight covers must be installed
  • Headlight buckets may be removed/omitted
  • Lost headlight covers may be replaced with decal/tape
• Taillights and covers may be removed/omitted
• Small body parts (mirrors, canards, exhausts, front splitters) may be omitted to prevent racing damage
• Wings: Standard rear wings for corresponding hard-shell body may be used with no height limit
• Custom aftermarket plastic wings must meet 45mm height limit from ground

OPTION PARTS

• Allowed from any manufacturer: All upgrades are open except Motor, Body, Batteries and ESC board
• Adding weight via tungsten putty, stick weight, or cut hobby brass is allowed
  • Not Allowed:
  • Prototype parts
• Public availability requirements:
• Parts must be publicly announced via social media or website
• Parts must be available for purchase nationally 45 days prior to race
• 3D print files must be shared with the public 30 days before event start

CHASSIS

• Allowed models: Kyosho MR03S, MR03S2, & MR03 RWD, Jomurema, MRC MRC01, PN PNR2.5W

WHEELBASE

• Only allowed wheelbases: 90mm, 94mm, 98mm, and 102mm

MOTOR

• Any manufacturer 3500Kv motor (sensored or sensorless)
• Maximum can diameter: 15mm
• Maximum Kv: 3800
• No optional or aftermarket rotors allowed
• Motors must not be tampered with or modified

GEAR RATIO

• Any manufacturer pinion and spur allowed
• 16T Pinion / 53T Spur

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size limitations:
  • Maximum front-wheel width: 8.5mm
  • Maximum rear-wheel width: 11mm (not including outer flange/disk)
  • Maximum wheel diameter: 20mm
  • Minimum wheel diameter: 19mm
• Wheels must be original designs made for 1/28 scale cars
• Wheel and tire must fit inside the body

TIRES

• Maximum tire diameter (mounted): 25.5mm
• Front tires must be 8.5mm and rear tires 11mm
• Tire warmers are allowed
• Tires may be cleaned with water only
• Not Allowed:
  • Traction compound on tire or race surface
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties

BATTERIES

• Cars must be powered by 4 AAA batteries
• Allowed types: Alkaline, Ni-MH, or Ni-Cd
• An additional battery is allowed only for transponder connection

ESC / RECEIVER

• Any manufacturer ESC and Receiver in the same flat board configuration as the Kyosho EVO board
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

BODY

• Any manufactured molded hard shell that fits the allowed wheelbase
• All parts must be original for that body
• Limited wheel and ground clearance modifications allowed
• Lexan roofs, windows, and wings are allowed
• Shaving/thinning body material for weight reduction is allowed
• Size limitations:
  • Maximum body length: 180mm
  • Maximum width: 80mm
• Headlight requirements: Original headlight covers must be installed
• Headlight buckets may be removed/omitted
• Lost headlight covers may be replaced with decal/tape
• Taillights and covers may be removed/omitted
• Small body parts (mirrors, canards, exhausts, front splitters) may be omitted to prevent racing damage
• Wings: Standard rear wings for corresponding hard-shell body may be used with no height limit
• Custom aftermarket plastic wings must meet 45mm height limit from ground

WEIGHT

• Minimum weight: 160 grams (race ready)

OPTIONAL PARTS

• Any aftermarket 1/28 scale publicly available production or 3D printed parts allowed
• Adding weight via tungsten putty, stick weight, or cut hobby brass is allowed
• Not Allowed: Prototype parts
• Public availability requirements: Parts must be publicly announced via social media or website 45 days prior to race
• Parts must be available for purchase nationally 45 days prior to race
• 3D print files must be shared with the public 30 days before event start

CHASSIS

• Any 1/28 scale 2wd Lipo chassis

WHEELBASE

• Only allowed wheelbases: 98mm and 102mm

MOTOR

• Any manufacturer 2500Kv motor (sensored or sensorless)
• Maximum can diameter: 15mm
• Maximum Kv: 2800
• No optional or aftermarket rotors allowed
• Motors must not be tampered with or modified

GEAR RATIO

• Any manufacturer pinion and spur allowed
• 14T Pinion / 53T Spur

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size limitations:
  • Maximum front-wheel width: 8.5mm
  • Maximum rear-wheel width: 11mm (not including outer flange/disk)
  • Maximum wheel diameter: 20mm
  • Minimum wheel diameter: 19mm
• Wheels must be original designs made for 1/28 scale cars
• Wheel and tire must fit inside the body

TIRES

• Maximum tire diameter (mounted): 25.5mm
• Front tires must be 8.5mm and rear tires 11mm wide
• Tire warmers are allowed
• Tires may be cleaned with water only.
• Not Allowed:
  • Traction compound on tire or race surface
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties

BATTERIES

• 2-cell 8.4v LiPo Battery

ESC / RECEIVER

• Any manufacturer 1/28 ESC and Receiver allowed
• ESC must not have any timing, turbo or boost activated and have a visual Blinking LED. (Blinky Mode) LED. (Blinky Mode)
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

BODY

• Any manufactured molded hard shell that fits the allowed wheelbase
• All parts must be original for that body
• Limited wheel and ground clearance modifications allowed
• Lexan roofs, windows, and wings are allowed
• Shaving/thinning body material for weight reduction is allowed
• Size limitations:
  • Maximum body length: 180mm
  • Maximum width: 80mm
• Headlight requirements: Original headlight covers must be installed
• Headlight buckets may be removed/omitted
• Lost headlight covers may be replaced with decal/tape
• Taillights and covers may be removed/omitted
• Small body parts (mirrors, canards, exhausts, front splitters) may be omitted to prevent racing damage
• Wings: Standard rear wings for corresponding hard-shell body may be used with no height limit
• Custom aftermarket plastic wings must meet 45mm height limit from ground

WEIGHT

• Minimum weight: 160 grams (race ready)

CHASSIS

• Any 1/28 scale 2wd Lipo chassis

WHEELBASE

• Only allowed wheelbases: 98mm and 102mm

MOTOR

• Any manufacturer 3500Kv motor (sensored or sensorless)
• Maximum can diameter: 16mm
• Maximum Kv: 3800
• No optional or aftermarket rotors allowed
• Motors must not be tampered with or modified in any way

GEAR RATIO

• Any manufacturer pinion and spur allowed
• Max 14T Pinion / 53T Spur

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size specifications:
  • Front-wheel width: 8.5mm
  • Rear-wheel width: 11mm (not including outer flange/disk)
  • Maximum wheel diameter: 20mm
  • Minimum wheel diameter: 19mm
• Wheels must be original designs made for 1/28 scale cars
• Wheel and tire must fit inside the body

TIRES

• Maximum tire diameter (mounted): 25.5mm
• Front tires must be 8.5mm and rear tires 11mm wide
• Tire warmers are allowed
• Tires may be cleaned with water only.
• Not Allowed:
  • Traction compound on tire or race surface
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties

BATTERIES

• 2-cell 8.4v LiPo Battery

ESC / RECEIVER

• Any manufacturer 1/28 ESC and Receiver allowed
• ESC must not have any timing, turbo or boost activated and have a visual Blinking LED. (Blinky Mode)
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

BODY

• Any lexan non-pan car style 1:28 scale body.

WEIGHT

• Minimum weight: 160 grams (race ready)

CHASSIS

• Any 1/28 scale 2wd Lipo F1 chassis

WHEELBASE

• Only allowed wheelbase: 112mm – 116mm

MOTOR

• Any manufacturer 2500Kv motor (sensored or sensorless)
• Maximum can diameter: 15mm
• Maximum Kv: 2800
• No optional or aftermarket rotors allowed
• Motors must not be tampered with or modified

GEAR RATIO

• Any manufacturer pinion and spur allowed
• 12T Pinion / 53T Spur

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

• Maximum tire diameter (mounted): 25.5mm
• Front tires must be 11mm and rear tires 14mm wide
• Tire warmers are allowed
• Tires may be cleaned with water only
• Not Allowed:
  • Traction compound on tire or race surface
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
• Tire inserts
• Using illegal tire cleaner will result in penalties

BATTERIES

• 2-cell 8.4v LiPo Battery

ESC / RECEIVER

• Any manufacturer ESC and Receiver allowed
• ESC must have and be in BLINKY MODE
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

BODY

• Lexan F1 Bodies only: GLF-1, PN-F1, MWX, G-Force
• Aftermarket front and rear wings allowed (must look like an F1 wing)

WEIGHT

• Minimum weight: 140 grams

CHASSIS

• Any 1/28 scale AWD Lipo chassis

WHEELBASE

• Only allowed wheelbases: 98mm and 102mm

MOTOR

• Any manufacturer motor allowed (sensored or sensorless)
• Maximum can diameter: 16mm

GEAR RATIO

• Open

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size specifications:
  • Maximum front-wheel width: 11mm
  • Maximum rear-wheel width: 14mm (not including outer flange/disk)
  • Maximum wheel diameter: 20.5mm
  • Minimum wheel diameter: 19mm
• Wheels must be original designs made for 1/28 scale cars
• Wheel and tire must fit inside the body

TIRES

• Maximum tire diameter (mounted): 25.5mm
• Front tires must be 11mm and rear tires 14mm wide
• Tire warmers are allowed
• Tires may be cleaned with water only
• Not Allowed:
  • Traction compound on tire or race surface
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties

BATTERIES

• 2-cell 8.4v LiPo Battery

ESC / RECEIVER

• Any manufacturer ESC (sensored or sensorless) and Receiver allowed
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

APPROVED AWD BODIES

• Any lexan non-pan car style 1:28 scale body.

CHASSIS

• Any 1/28 scale 2wd Lipo chassis
• Prototype or pre-production chassis allowed

MOTOR

• Any manufacturer motor allowed (sensored or sensorless)
• Maximum can diameter: 16mm

GEAR RATIO

• Open

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size specifications:
  • Maximum front-wheel width: 11mm
  • Maximum rear-wheel width: 14mm (not including outer flange/disk)
  • Maximum wheel diameter: 20.5mm
  • Minimum wheel diameter: 19mm
• Wheels must be original designs made for 1/28 scale cars
• Wheel and tire must fit inside the body

TIRES

• Front tires maximum width: 11mm
• Rear tires maximum width: 14mm
• Tire warmers are allowed
• Tires may be cleaned with water only
• Not Allowed:
  • Traction compound on tire or race surface
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties

BATTERIES

• 2-cell 8.4v LiPo Battery

ESC / RECEIVER

• Any manufacturer ESC (sensored or sensorless) and Receiver allowed
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

APPROVED 2WD MOD BODIES

• Any lexan non-pan car style 1:28 scale body.

CHASSIS

• Any 1/28 scale 2wd Lipo chassis
• Prototype or pre-production chassis allowed

MOTOR

• Any manufacturer motor allowed (sensored or sensorless)
• Maximum can diameter: 16mm

GEAR RATIO

• Open

WHEELS

• All brand plastic and aluminum 1/28 scale production wheels allowed
• Size specifications:
  • Maximum front-wheel width: 11mm
  • Maximum rear-wheel width: 14mm (not including outer flange/disk)
  • Maximum wheel diameter: 20.5mm
  • Minimum wheel diameter: 19mm
• Wheels must be original designs made for 1/28 scale cars
• Wheel and tire must fit inside the body

TIRES

• Front tires maximum width: 11mm
• Rear tires maximum width: 14mm
• Tire warmers are allowed
• Tires may be cleaned with water only
• Not Allowed:
  • Traction compound on tire or race surface
  • Homemade tires
  • Foam tires
  • Silicon tires
  • Urethane tires
  • Ethyl Carbamate tires
  • Tire inserts
• Using illegal tire cleaner will result in penalties
  

BATTERIES

• 2-cell 8.4v LiPo Battery

ESC / RECEIVER

• Any manufacturer ESC (sensored or sensorless) and Receiver allowed
• Not Allowed:
  • Receivers with built-in Gyro
  • Separate Gyros

APPROVED LEXAN PAN CAR BODIES

• Any lexan pan car style 1:28 scale body.

Chassis:
OBRC OBZ V1 or V2 Chassis

Body:
3D Printed Euro Truck Body (https://www.thingiverse.com/thing:4313921)

Motor:
2500KV Brushless Motor

ESC:
Any Brushless Sensored or Sensorless ESC allowed.

Wheels:
Any Plastic or Aluminum wheels, Front 8.5mm x 20mm, Rear 11mm x 20mm, offset must fit inside of the body.

Tires:
Any Production Rubber Tire
No tire cleaners or traction compounds. Can clean with water only.

Gear Ratio:
10T 64 Pitch Pinion with 53T 64 Pitch Spur Gear.

Batteries:
2S Li-Po Battery, Max 8.44V

Option Parts:
Any Production or 3D Printed Parts Allowed.