Racers at AMain.com’s off-road, onroad and oval tracks are separated for competition by both car type and skill level, and the following is a synopsis of the rules for each of the different classes that are offered. If you wish to race a class that is not listed here, please let us know and we can consider adding it to our program.
Please note that, due to attendance or special events, we may not offer all classes on the same race days. Check the Race Calendar to find what classes are racing on each race day.
We go mostly by ROAR Rules for offroad and onroad classes: https://www.roarracing.com/rules.php
Rookie
The Rookie class is for entry-level drivers that are new to RC racing. The rules for this division are:
1/10th (INDOOR):
- Chassis: Any 2wd 1/10th electric off-road competition vehicle or 1/10th RTR vehicle with RTR electronics. We strongly discourage the use of 4wd vehicles in this division.
- Motor: 27T brushed motors, or 17.5T to 21.5T brushless motors or the original RTR power system for your specific vehicle
- Batteries: 6-cell NiMH batteries, or 2-cell hard case Li-Poly batteries
- Tires:
- Bodies: Any body style is allowed.
- Minimum Weight: None.
1/8th (outdoor):
- Chassis: Any nitro or electric 1/8th off-road vehicle or 4wd Short Course Trucks are allowed
- Nitro Motor:
- RTR pull-start or roto-start engine
- Buggy, .21 open competition motor max.
- Truggy, .28 open competition motor max.
- Electric Motor:
- Any 1/8th electric motor
- Any 4wd SCT electric motor
- Batteries: 2-cell hard case Li-Poly batteries for 4wd SCT, 3-cell and 4-cell batteries for eBuggy and eTruggy
- Tires: Any tires are allowed.
- Bodies: Any body style is allowed.
- Minimum Weight: None
Stock Buggy
The Stock Buggy division is for intermediate and advanced racers who wish to run 2wd buggies with stock/spec motors, and is often the largest divisions at the track. The rules for this division are:
Stock Stadium Truck
The Stock Stadium Truck division is for intermediate to advanced racers who wish to run 2wd stadium trucks with stock/spec motors and is one of our largest and most competitive divisions at the track. The rules for this division are:
Stock Short Course Truck
The Stock Short Course Truck division is a great class for both intermediate and advanced racers alike looking to race 2wd short course trucks with stock/spec motors which offer very realistic looking vehicles. If you are relatively new to off-road racing, you may want to consider this division. The rules for this division are:
Pro Stock Buggy
The Pro Stock Buggy division is for advanced/expert racers who wish to run 2wd buggies with stock/spec motors. This division is the most competitive divisions at the track. The rules for this class are:
Open 2wd Buggy
The Modified Buggy division is for advanced/expert racers who wish to run modified motors, and is one of the fastest and most demanding divisions at the track. The rules for this class are:
- Chassis: Any off-road 2-wheel drive buggy style chassis.
- Motor: Any brushless motor. Generally this class will be 13.5T motors and lower.
- Batteries: 6-cell NiMH batteries, or 2-cell hard case Li-Poly batteries
- Tires: TBD
- Bodies: Any 2WD buggy body intended for the class.
- Minimum Weight: 1500 grams.
Open 4WD Buggy
The Modified 4WD Buggy division is for advanced/expert racers who wish to run 4-wheel drive buggies with modified motors for the most challenging and fastest divisions of racing at the track. The rules for this class are:
- Chassis: Any 1/10th off-road 4-wheel drive buggy style chassis.
- Motor: Any brushless motor. Generally this class will be 10.5T motors and lower.
- Batteries: 6-cell NiMH batteries, or 2-cell hard case Li-Poly batteries
- Tires: TBD
- Bodies: Any 4WD buggy body intended for the class.
- Minimum Weight: 1613 grams.
13.5 4WD Buggy
The 13.5 4WD Buggy division is for intermediate racers who wish to run 4-wheel drive buggies with ROAR approved 13.5 motors for the most challenging and fastest divisions of racing at the track. The rules for this class are:
Open Stadium Truck
The Modified Stadium Truck division is for advanced/expert racers who wish to be able to run 2wd stadium trucks with modified motors. The rules for this class are:
- Chassis: Any off-road 1/10 2-wheel drive stadium truck chassis (no short course truck chassis).
- Motor: Any brushless motor. Generally this class will be 13.5T motors and lower.
- Batteries: 6-cell NiMH batteries, or 2-cell hard case Li-Poly batteries
- Tires: TBD
- Bodies: Any 2WD truck body intended for the class.
- Minimum Weight: 1700 grams.
Open 4WD Short Course Truck
The Open 4WD Short Course Truck class is for intermediate and advanced racers, with realistic looking trucks that are easy to drive. You must run 4WD trucks in this class. The rules for this class are:
- Chassis: Any off-road 4-wheel drive Short Course Truck style chassis.
- Motor: Any 540 or 550 based brushless motor can be used; 550-size or 4-pole motors are commonly used.
- Batteries: 6-cell NiMH batteries, or 2-cell hard case Li-Poly batteries
- Tires: TBD. 1/8 Buggy tires are NOT allowed!
- Bodies: Any short course truck style body.
- Minimum Weight: 2505 grams.
Open 2wd Short Course Truck
The Pro 2 Short Course Truck division class is a great class for advanced/expert racers wishing to compete with 2wd short course trucks and modified motors, and offers very realistic looking vehicles. The rules for this class are:
- Chassis: Any off-road 2-wheel drive Short Course Truck style chassis.
- Motor: Any brushless motor. Generally this class will be 10.5T motors and lower.
- Batteries: 6-cell NiMH batteries, or 2-cell hard case Li-Poly batteries
- Tires: TBD. 1/8 Buggy tires are NOT allowed!
- Bodies: Any short course truck style body.
- Minimum Weight: 2098 grams.
Pro 4wd Short Course Truck
The Pro 4 Short Course Truck division is for advanced/expert racers, with realistic looking trucks and all the horsepower to match. You must run 4WD trucks in this class. The rules for this class are:
- Chassis: Any off-road 4-wheel drive Short Course Truck style chassis.
- Motor: Any 540 or 550 based brushless motor can be used; 550-size or 4-pole motors are commonly used.
- Batteries: 6-cell NiMH batteries, or 2-cell hard case Li-Poly batteries
- Tires: TBD. 1/8 Buggy tires are NOT allowed!
- Bodies: Any short course truck style body.
- Minimum Weight: 2505 grams
eBuggy Lite
eBuggy Lite class is an indoor class for advanced/expert racers only, as the size and weight of the cars makes them potentially very dangerous. Drivers who do not exhibit proper control of their vehicles may not be allowed to race or practice in this division until his or her skills improve when used at Outback Raceway. The rules for this class are:
- Chassis: Any 1/8th off-road 4-wheel drive buggy style chassis or converted 4wd SCT chassis
- Motor: Any 540 or 550 based brushless motor.
- Max length = 73 mm
- Max Diameter = 36 mm
- See motor battery combinations below for motor battery combination limits.
- No full sized 1/8th scale electric motors allowed
- Batteries: Hard case Li-Poly batteries
- 2-cell hard case Li-Poly battery
- 3-cell hard case Li-Poly battery
- 4-cell hard case Li-Poly battery. Hard case can not be larger than a 2-cell hard case
- Length = 139 mm
- Width = 47 mm
- Height = 25.1 mm
- Battery/Motor Combinations:
- 2-cell (2S/7.4v) with 4800kv motor limit (or 35,500 +/- 500rpm)
- 3-cell (3s/11.1v) with 2700kv motor limit (or 30,000 +/- 500rpm)
- 4-cell (4s/14.8v) with 2000kv motor limit (or 30,000 +/- 500rpm)
- The goal is to put a cap on the overall rpm the motors can make with the battery
chosen. Note that the higher voltage lower kv setup is NOT an advantage and is the recommended power system for this division.
- Tires: Any wheel with rubber tires intended for the class is allowed.
- Bodies: Any 1/8th 4WD buggy body intended for the class.
- Maximum Weight: 3200 grams. (The intent for 2013/2014 is to get this class developed and not enforce max weight. Max weight will be enforced with the start of the 2014/15 indoor season and 2015 outdoor season).
1/8th Nitro Buggy
The 1/8th Nitro Buggy division is for advanced/expert racers, with nitro engines and 4wd chassis. The rules for this class are:
- Chassis: Any off-road 4-wheel drive nitro buggy style chassis.
- Motor: .21 open competition engines max., or stock RTR pull start/roto start engines.
- Tires: Any rubber tire/wheel designed specifically for 1/8 buggy racing.
- Bodies: Any 1/8 nitro buggy body.
- Minimum Weight: 3200 grams
1/8th Nitro Truggy (Truck)
The 1/8th Nitro Truggy division is for intermediate and advanced racers, wishing to race 4wd nitro powered trucks. The rules for this class are:
- Chassis: Any off-road 4-wheel drive nitro truggy (truck) style chassis.
- Motor: .28 open competition engines max, or stock RTR pull start/roto start engines..
- Tires: Any rubber tire/wheel designed specifically for 1/8 truggy (truck) racing.
- Bodies: Any 1/8 nitro truggy (truck) body.
- Minimum Weight: 4000 grams.
- Maximum Weight: 13 lbs 6 oz.
1/8th Electric Buggy
The 1/8th Electric Buggy division is for advanced/expert racers, with electric motors and 1/8th 4wd buggy chassis. Drivers who do not exhibit proper control of their vehicles may not be allowed to race or practice in this division until his or her skills improve when used at Outback Raceway. The rules for this class are:
- Chassis: Any 1/8th electric buggy specific chassis, nitro to electric converted chassis or eBuggy Lite chassis
- Motor: any 1/8th electric brushless motor.
- Tires: Any rubber tire/wheel designed specifically for 1/8 buggy racing.
- Bodies: Any 1/8 nitro or electric buggy body.
- Minimum Weight: 3200 grams.
- Legal eBuggy Lites vehicles will be legal in this division of racing.
1/8th Electric Truggy (Truck)
The 1/8th Electric Truggy division is for advanced/expert racers, with electric motors and 1/8th 4wd truck chassis. The rules for this class are:
- Chassis: Any 1/8th electric truggy specific chassis or nitro to electric converted chassis.
- Motor: any 1/8th electric brushless motor.
- Tires: Any rubber tire/wheel designed specifically for 1/8 truggy racing.
- Bodies: Any 1/8 nitro or electric truggy body.
- Minimum Weight: 4000 grams.
- Maximum Weight: 13 lbs 6 oz.
On-Road Vehicle Classes and Rules
All classes with a specification motor (17.5, 21.5, & 25.5) are run as “Blinky” classes. This means no ESC timing or ramping is allowed. No exceptions. Maximum allowable voltage is 8.44 volts. Minimum ride height sedan style 10th scale 5mm 12th scale 3mm. Specific rules below:
Rookie
Run what you brung.
- Chassis: Any 1/10th electric
- Motor: any 1/10th electric brushless motor.
- Tires: Any rubber tire/wheel designed specifically for 1/10th onroad
- Bodies: Any 1/10th body.
21.5 Touring Car
190mm width 4 door sedan body. Rubber TC Tires. Any ROAR Approved 21.5 turn motor and any ROAR Approved ESC with no timing or ramping, evident from the ESC’s LED Blinking. ROAR spec electronics/weights apply. 1320g minimum weight:
17.5 Touring Car
190mm width 4 door sedan body. Rubber TC Tires. Any ROAR Approved 17.5 turn motor and any ROAR Approved ESC with no timing or ramping, evident from the ESC’s LED Blinking. ROAR spec electronics/weights apply. 1320g minimum weight:
Mod Touring Car
190mm width 4 door sedan body. Rubber TC Tires. Open motor and ESC with 1320g minimum weight:
USGT
190mm width 2 door GT body. Gravity RC USGT Spec tires must be used. Any ROAR Approved 21.5 turn motor and any ROAR Approved ESC with no timing or ramping, evident from the ESC’s LED Blinking. 1350g
Vintage Trans AM
190mm sedan, ROAR Approved ESC with no timing or ramping, evident from the ESC’s LED Blinking, 25.5 motors, 6000mah maximum capacity batteries, and driver figures must be used. 1425g
Tamiya Euro Truck
This class is run with similar rules to the Tamiya Championship Series. The spirit of this class is to be a fun, truly “build it and run”, low-cost, box stock class.
- Tamiya TT-01 based Euro Semi Truck kits only. The kit must be built EXACTLY as shown in the manual.
- Must use kit supplied motor and ESC. The original motor bullet connectors must be used and the wires may not be shortened. The battery connector may be replaced with a Dean’s style connector.
- Reverse must be disabled in the ESC.
- Only upgrades allowed is ball bearings and screws
- No modifications to the chassis or any other kit parts are allowed.
- All kit screw locations must be used. Screws may not be omitted to change the handling of the truck.
- You must run all the kit parts including (but not limited to) the servo saver, springs, steering links, etc. Again, this is a box stock, fun, low cost class. Bearings are the ONLY upgrade allowed!
- Racers may use grease in the differentials. However, grease must not leak out of vehicle. Differentials must work and cannot be “locked” mechanically or with putty or similar materials.
- Must use kit supplied pinion and spur gears.
- Must use kit supplied tires and wheels. Foam or other tire inserts are not allowed.
- Tires may be glued on the sidewalls ONLY.
- The full body must be used. Body may not be modified to lower center-of-gravity or reduce weight. Tamiya bodies only (including the “Fat Fox”)!
- Adding FOAM material to the kit foam bumper is allowed.
- 2S LiPo hardcase battery. Max capacity of 6,000mAh. (Protek recommended https://www.amainhobbies.com/protek-rc-2s-100c-sigraphene-hv-lipo-stick-pack-tcs-battery-7.6v-5000mah-ptk-5129-19/p-qqzwqqeqbb2xactz) Chassis may not be modified to fit the battery. Kit supplied battery strap must be used.
- Max voltage of 8.44V
- SXT traction compound may be used. SXT is the only brand of compound allowed.
- Any servo and receiver may be used.
Tamiya TT-02 GT
This class is run with similar rules to the Tamiya Championship Series. The spirit of this class is to be a fun, truly “build it and run”, low-cost, box stock class.
- Tamiya TT-02 1/10 4wd Electric Touring Car. The kit must be built EXACTLY as shown in the manual.
- Can not use TT-02 Type-SRX or Kit version of car.
- Must use kit supplied motor and ESC. The original motor bullet connectors must be used and the wires may not be shortened. The battery connector may be replaced with a Dean’s style connector.
- Reverse must be disabled in the ESC.
- Only upgrades allowed is ball bearings, servo horn, screws and alum center driveline.
- No modifications to the chassis or any other kit parts are allowed.
- All kit screw locations must be used. Screws may not be omitted to change the handling of the truck.
- You must run all the kit parts including (but not limited to), springs, steering links, etc. Again, this is a box stock, fun, low cost class. Bearings, CENTER driveline and screws are the ONLY upgrade allowed!
- Racers may use grease in the differentials. However, grease must not leak out of vehicle. Differentials must work and cannot be “locked” mechanically or with putty or similar materials.
- Must use kit supplied spur gear, but pinion will be open to fitment without modification.
- 1 Foam or other tire inserts are not allowed.
- Tires will be Yokomo Sorex Pre-Glued Touring car Tires w/Carpet inserts. https://www.amainhobbies.com/yokomo-sorex-preglued-touring-car-tires-4-28-shore-yokzr-so28rc/p1536011?v=1516921
- Tires may be glued on the sidewalls ONLY.
- The full body must be used. Body may not be modified to lower center-of-gravity or reduce weight. Tamiya bodies intended for this kit only!
- Adding FOAM material to the kit foam bumper is allowed.
- 2S LiPo hard case battery. Max capacity of 6,000mAh. (Protek recommended https://www.amainhobbies.com/protek-rc-2s-100c-sigraphene-hv-lipo-stick-pack-tcs-battery-7.6v-5000mah-ptk-5129-19/p-qqzwqqeqbb2xactz) Chassis may not be modified to fit the battery. Kit supplied battery strap must be used.
- Max voltage of 8.44V
- SXT traction compound may be used. SXT is the only brand of compound allowed.
- Any servo and receiver may be used.
12th Scale GT12
Motor: 21.5 brushless motor Rotor: Stock Gearing: Open ESC: ROAR approved 1s non-timing ESC in its approved “blinky” mode Battery: 1s hardcase LiPo Max Battery Voltage: 4.20v Tires/Rims: SJT Rubber Tires (SJT tires and rims only) Body: 1/12th GT style body (no LMP bodies). Minimum Total Weight: 750g Minimum Ground Clearance: 3mm Maximum Width: 172mm Minimum Body Height/Wing: Bodies must be cut to the body height lines, no “slamming” the body.
12th Scale Stock 17.5
Motor: 17.5 brushless motor Rotor: Stock Gearing: Open ESC: ROAR approved 1s non-timing ESC in its approved “blinky” mode Battery: 1s hardcase LiPo Max Battery Voltage: 4.20v Tires/Rims: CRC BSR purple stripe tires Body: 1/12th LMP bodies. Minimum Total Weight: 730g Minimum Ground Clearance: 3mm Maximum Width: 172mm Minimum Body Height/Wing: Bodies must be cut to the body height lines, no “slamming” the body.
F1
90mm maximum width. Realistic F1 front suspension to be mounted within the confines of the body. Rubber Tires with purpose-made Formula 1 Rims. ROAR Approved 25.5 turn motor and electronic speed control with no timing or ramping programmed. This is evident from the ESC’s LED blinking (also referred to as blinky mode). 1050g minimum weight
SR10 Spec Class
Shocks & Suspension
- Must run stock shocks and springs
- Changing shock oil in each of the shocks is allowed
- Must run stock 12mm shock piston, 2-hole, Part No.91444
- Limiters in the shocks are allowed
- Pre-load and droop may be adjusted
Transmission Gearing & Differential
- Spur gear must be 87T, Part No.9654
- Differential, when turning one back tire, opposite wheel must not turn in the same direction, holding off ground. Fluid may be adjusted.
- No aftermarket upgrades to the drivetrain are allowed, MUST BE ALL Stock SR10 components
- Must run stock slipper clutch assembly, no lockouts
- Any size pinion gear is allowed
Electronics – Motors, ESC, Servo & Radio
- Electronics must be mounted in stock OEM location
- No AVC, GYRO or additional traction control devices allowed (Automatic DQ)
- Motor 3300Kv Reedy from Team Associated is the only motor allowed
- No motor Cooling Fan
- ESC must be Reedy SC600-BL Brushless ESC
- Steering Servo OEM Servos steering servo part no. 27110 and 27111
- Radio – XP120 2.4 Radio & Receiver also you can use other radio and receiver if want to pair to your existing radio. Radio part number 29203 receiver 29256 or 29204
Batteries
- 7.4V / 2S LIPOs Maximum (8.44V), running over this voltage is automatic DQ no more than 6000mah allowed
- Battery must be mounted down the center of the chassis or in OEM location
Body Style
- Molded SR10 Monte Carlo body or approved bodies noted below are the only allowed bodies in SR10.
- No additional wings, flaps, wickers, vents or air devices allowed (no added holes)
- You may have a total of 1” spoiler including the molded spoiler
- Spoiler may not be wider than the stock molded spoiler
- Decking is not allowed, must have all windows and no cut outs of any window
- Body must be cut to trim lines; No cutting out of the back above bottom of bumper, fender wells can be cut for tire clearance
· Approved Body list:
- SR10 Street Stock Body, Clear (paint/wrap as wanted) Part No. 784695711921
- SR10 Street Stock Body, Clear (Painted) Part No. 784695711938
- JCONCEPTS 1978 Camaro Street Stock Body – Part No. 0395
- JCONCEPTS 1987 Monte Carlo Street Stock Body – Part No. 0422L
Tires & Wheels
- Rubber Tires & 1/10th Tires & Wheels Only
- JCONCEPTS Sprinters are the only allowed aftermarket tire
- You may run the stock SR10 rear and front tires
- JCONCEPTS Rear Sprinters Part Numbers:
- Part No.3133-R2 (Medium Soft Long Wear)
- Part No.3133-01 (Blue Soft Compound)
- Part No.3133-02 (Green Super Soft Compound)
- JCONCEPTS Front Sprinters Part Numbers:
- Part No.3134-R2 (Medium Soft Long Wear)
- Part No.3134-01 (Blue Soft Compound)
- Part No.3134-02 (Green Super Soft Compound)
- SR10 Wheels Stock Wheels are allowed
- Tire Sauce is allowed, tires must be dry when entering track
