RJ Speed Legends (2 cell)

​(Updated 10/13/2023)

 1. RJ Speed legends kit only.
 2. Servo can be mounted in any location in the front of car.
 3. No shaving any of the chassis or drilling holes to reduce weight.
 4. Only RJ Speed legends chassis parts or similar TK Racing can be used.
 5. Bearings are legal to use.
 6. Turnbuckles are ok to be used for steering linkage only.
 7. SPEC Gearing. Only an 81-tooth spur and either a 18-tooth pinion or lower.  48 pitch gears only.
 8. Any pan car front spring.
 9. Factory front bumper must remain on car.
10. Can substitute similar TK Racing parts.

11.  All parts must be available for purchase from the RJ Speed website or TK Racing website/facebook page.

12.  No printed parts.  No side trays for weight.

1.  Only RJ Speed full fender legends bodies are legal.
2.  No scraping of the body or drilling holes in the chassis to reduce weight.
3. Must use RJ Speed Legend body cut on the cut lines. 
4. Windows must remain intact.
5. Body post/mount holes must be punched in the factory marked hole locations. 

Blue, purple or yellow stripe spec tire or rubber CRC tires are the only legal tires

1. Any steering servo can be used.
2. Any esc can be used in blinky mode.
3. Trinity Equalizer 21.5 motor.  MUST BE MOUNTED ON THE RIGHT SIDE.

4. Any 1800 Mah 6cell Nihm battery pack or ROAR Legal 2 cell lipo battery max 5200 Mah


                                                  ​​RJ Speed Sprints

(Last updated 4/2/2023)


  1. Only Spec10 sprint kit RJ Speed kit part #:  RJS2033
  2. 1 or 3 piece RJ Speed front end is legal.  NO OFFSET FRONT END IS ALLOWED.
  3. No shimming of the front arms or kingpins is allowed.
  4. Stock bushings are to be used in both the front tires and the rear axle. NO BEARINGS ARE ALLOWED.
  5. No cutting or shaving of the chassis to reduce weight.
  6. The only legal springs are the RJ Speed #5228 red or yellow springs shipped with the kit or the TK Racing red springs.
  7. Only stock RJ Speed parts are allowed other than TK Racing steering blocks, TK Racing springs and TK Racing Fatbar kit.
  8. Crossbraces must be mounted in the exact locations as specified in the build instructions.  Except for the bar in the lower front of the battery tray to allow the servo to be mounted under the battery tray.
  9. Turnbuckles are allowed for steering linkage.
  10.  No wings on the cars.
  11.  It is legal to use the TK Racing "battery hold down" (part # TK-2020106) to make it easier to mount battery.


  1. Any yellow, purple or blue striped spec foam tire.


  1. Any servo can be used.
  2. Any roar approved 2s lipo with a max of 5200 mah.
  3. Hobbywing Justock 17.5 Justock motor/esc combo. (XR10 JUSTOCK COMBO (G3 ESC + G2.1 Motor; SKU:  38020321;  Motor part #:  30408006).  MOTOR MUST BE MOUNTED ON THE RIGHT SIDE.
  4. Motors cannot be opened or adjusted from factory specs.  This means no changing to ceramic bearings or going to a non-stock rotor.


  1. 81 tooth 48p spur gear and 17t 48p pinion.


Sportsman RTT

(Last updated 2/26/2024

This class is intended for sportsman racers.

See Facebook, TOUR page, click on Files.

Super Stock Slash

(Last updated 2/26/2024)

1.  12T Titan motor 3785 Traxxas w/XL-5 esc
2.  Hobbywing Justock 13.5 fixed timing motor/esc combo

Battery / Electronics
1.  2s Lipo or 8.4v NiMh
2.   Any steering servo

1.  Speedhawk 2.8 tires wheels - part# DYNW0020 / DTXC2900 or Duratrax Bandito DTXC3544 / DTXC3542

1.  Any body that covers front rear and tires
2.  No wedge bodies. No late model bodies

Chassis / Parts
1.  Traxxas LCG chassis (unaltered). You cannot cut the chassis to save weight
2.  Only Slash RPM or stock front bumper
3.  Stock transmission case or RPM case with Traxxas parts inside
4.  Aluminum hubs, casters and shock caps are legal. No other aluminum parts
5.  Stock 2wd Traxxas Slash shocks with aluminum caps. Limiters are ok
6.  RPM A arms are legal
7.  Must run 48 pitch gears.  Spur gears must be stock 2wd Traxxas gears.

8.  Transmission must be in the stock rear mount position.

Any other modification will be considered illegal

Spec 10

Rules for this class are managed/owned by the Spec10 Mafia board.

(Last updated 1/24/2024)

Chassis and parts
1.  All parts must be available for purchase from the RJ Speed website or TK Racing website/facebook page.  

2.  RJ Speed Spec 10 or TK Racing Godfather chassis only. No spec mod.  NO PRINTED PARTS.
RJ Speed Spec 10 or TK Racing unmodified parts only, this also includes springs, steering blocks and axles.                      Turnbuckles are allowed for steering links.  Bearings are allowed.
No cutting or shaving of ANY parts to reduce weight.  No drilling holes in any parts or body to reduce weight.
92 tooth spur only and 46 or 47 tooth pinion only. (64 Pitch gears only.)

6.  ​The only legal springs are the RJ Speed #5228 red or yellow springs shipped with the kit or the TK Racing red springs.

7.  Must run the RJ or TK rear bars and collars.

8.  Rear axle must be part # RJS-5730
9.  4mm ride height minimum

10. Aluminum or anodized chassis screws are legal.

11.  No performance improving hardware.


1.  RJ Speed bomber body or McAllister 181 or 182 bomber body only.
2.  No alterations or scraping to the body.

3.  Body must be trimmed on the manufacturer’s molded cut line.  Wheel well area can be trimmed forward or back to fit the location of the tire.  
4.  The only holes allowed in the body are the 4 body mount holes.


1.  CRC rubber carpet tires only. #2314.
2.  The only allowed modification of the tires is gluing the sidewall.  Any and all other modifications to the tires are illegal.

Motor:  Gravity RC Spec10 17.5T (silver) Motor (part# GRC2020).
Battery:  The only legal battery is the 1s Protek 130C 8800Mah, part #:  PTK-5105-22.

4.  Servo must be a standard low-profile servo.

*No jumping the start of a race.  All cars must cross the start finish line in their qualifying order.  The driver who jumps the start is sent to the back of the field and the race is restarted.  Passing a car that was driven all the way up to the wall, without interference by another car, is not a jump.

*SIRCS is the Spec 10 headquarters and any class rule changes must be approved by SIRCS Spec 10 Mafia.

*Final interpretation of rules is left to SIRCS Spec10 Mafia

*This class is made so all cars are kept as even as possible and every attempt will be made to keep it that way, Including rule changes if necessary!

*This is a class to have fun with! CONTACT IS GOING TO HAPPEN!

​Motor rules for trophy races (RJ Speed Nationals, Oval Masters, Snowbirds......). 

1.  If the factor seal on the motor is broken or the motor appears tampered with, that motor will be subject to a tech inspection.  Based on the tech inspection, that motor may be considered illegal and cannot be used.
2.  Any heats run with illegal motors are not qualifiable times.

                                   2WD Stock Short Course

(Last updated 2/25/2022)

1. Truck must be a 2WD Built RTR/ Kit stock Short Course Truck.
2.  Battery - Any 2 cell Lipo 65c max or 6-7 cell NiMH allowed.
3.  Motor -Traxxas Titan 12T motor, Hobbywing 13.5 Locked timing, or ROAR 17.5
4.  Electronics - Traxxas XL-5 ESC, or Hobbywing Justock, only
 but can be any servo/radio/receiver combo.
5.  Shocks - Must be stock shocks and springs
(You may use any weight shock oil and aluminum caps).
6.  Gearing - Any 48-pitch spur and pinion combination.
7.  Body - Any short course body that covers all 4 wheels when looking down on the truck.
8.  Must use only OEM parts.
9.  Tires - Must be box stock/ kit type tires and wheels. No large lugs, 4 x 4, mud, or monster truck tires
10. Ride Height rule - Truck Shall Be no lower than 23 mm.    
11.  Anything not listed above is not legal in this class!

HackFab Mini-T Late Model

(Last updated 2/25/2022)

These rules are established to keep the class as close as possible to stock while maintaining affordability.

1. Stock Losi Mini-T 2.0 vehicle only (older Losi models are allowed as long as their stock motor/battery combo is comparable to the 2.0).

2. Stock Losi Mini-T 2.0 brushless motor/esc combo (6000kv max).

3. Stock Losi Mini-T 2.0 battery (7.4v, 2 cell, 800Mah, 50c max).

4. Stock Losi Mini-T 2.0 gearing only:  48 pitch, 60T Spur, 15T pinion.

5. Stock Losi Mini-T 2.0 BK bar tires only (No pins or ribbed tires).

6. Stock Losi Mini-T 2.0 parts only other than HackFab conversion kit, aluminum servo horn, aluminum A arms, TK Racing bumper and the HackFab shock towers.

7. Any late model body that covers all 4 wheels is allowed.  No side wings.

8. Anything not listed above is not legal in this class!

9.  Any changes/determinations for the class must be confirmed by the majority of Mini-T owners/racers.

HCOT Legends

​(Updated 2/26/2024)

1. Only RJ Speed or Bolink Legend chassis only.
2. Minimum weight of 32 oz.
3. Minimum ride height of 4mm.
4. Adjustable turnbuckles are legal
5. Factory front bumper must remain on car.

6. The only legal springs are the RJ Speed #5228 red or yellow springs shipped with the kit or the TK Racing red springs.

1. Must use the Hobbbywing Justock 25.5 combo.  All motors must be untampered.  MUST BE MOUNTED ON THE RIGHT SIDE.
2. Any ROAR approved 1s battery.

Tires – Gears - Bushings
1. Blue, purple or yellow stripe spec tire or rubber CRC tires are the only legal tires.
2. Gears:  48 pitch - 72 tooth spur - 47 - 49 pinion.
3. Must use the box stock bushings that come with the kit.  No wheel bearings.
4. No modifications to the bushings.
5. Only RJ Speed nylon or nylon/aluminum hybrid hubs only.  NO all-metal hubs.
6. No ceramic or carbide diff balls.

1. Must use RJ Speed Legend body cut on the cut lines. 
2. Windows must remain intact.
3. Body post/mount holes must be punched in the factory marked hole locations.

***All other National Legend rules will apply.
***Only RJ Speed or similar TK Racing parts can be used.  No carbon fiber after-market chassis or parts.
***Anything not specified in the rules above is considered illegal.​

SR10 Street Stock (Box Stock)

(​Last updated 5/18/2024)

1. All parts in the kit must be used for their intended purpose only.

2.  Everything in or on the car must be box stock except for:

  • The pinion gear.  The pinion gear must be 21 tooth (48 pitch).

  • The servo.  The only legal substitute servos are the EcoPower WP110T (Torque) or WPS110S (Speed) servo.

  • It is legal to substitute an aftermarket transmitter/receiver combo, like Spektrum, Futbaba etc.

  • It is legal to change the esc/battery connectors.

3.  Only 2 kits can be raced in this class.  Part #:  ASC70030 and ASC70030C.  No mid-motor, carbon fiber chassis kits.

4.  Replacement bodies must be the same as the kit, part #ASC71192.

5.  All cars must run the stock Reedy WolfPack 3300mah/30C battery.

6.  The shocks must be left as they come from the kit (30 weight associated oil).

​7.  Ride height:  The car can sit no lower the spool of tape on the tech table.

8.​  No gluing of the sidewall of tires.


THE CAR YOU ARE RACING NEEDS TO BE THE SAME AS WHEN IT CAME OUT OF THE BOX.  The approved electronics changes are being made due to frequent kit parts failures.

**  This is meant to be a fun class with the goal of allowing a driver to go from the hobby shop to the track with their SR10 and be race ready in minutes.

                                                      Street Stock Rules

(Last updated 2/25/2022)

 1. Any 1/10 scale buggy chassis.
 2. Mid-motor configuration or rear motor configuration.
 3. No truck chassis are allowed or truck a-arms.
 4. Battery must be down the center of the chassis.
 5. Lowering kits are allowed along with touring shocks and a speedy's kit.  No other homemade kit with be allowed.
 6. Aftermarket body mounts and bumpers are allowed but metal bumpers or body parts are not permitted. 
 7. Limiting of shocks is allowed inside the shock.
 8. No adjustable a-arms or modifying the holes in the chassis to change the angle of the a-arms.
 9. All weight added must be inside the chassis.
 10. Minimum weight of 59 ounces.

 1. Any McAllister or Custom Works Street stock body.
 2. No open wheeled bodies are allowed.
 3. No decking the bodies, no vent holes, the car must have a complete windshield.
 4. Rear spoilers are optional.  They can only be one inch off the rear deck and no side panels.

 5. Rear bumper must remain intact. 

Motor, ESC & Battery:
 1. Any ROAR Approved 17.5 sensored motor and or the Traxxas 12 turn motor.
 2. No parts of either style motors may be modified, altered or removed in any way
 3. Any ROAR Approved 1/10 scale ESC in "BLINKY"
 4. Stock blue esc xl5 must be used with the Traxxas 12 turn motor.
 5. No “Outlaw” motors.

     Any foam or rubber tire without pins or aggressive tread mounted on 2.2 buggy wheels

     Any ROAR approved 2 cell Lipo (Maximum 8.44 volts).

6 Second Breakout  

(Last updated 2/25/2022)


1.  No open wheel bodies

2.  10th scale (no Slash size 10th scale)

3.  Foam or rubber tires are allowed, no aggressive treads or pins

4.  1 or 2 cell batteries only

5.  4 mm minimum ride height.

* Rules for the RJ Speed Nationals Breakout are on the Facebook event page.

RJ Speed Nationals 6 Second Breakout


1.  Any RJ Speed chassis or TK Racing chassis only
2.  Turnbuckles are allowed
3.  Minimum ride height of 4mm

1.  Any roar motor and speed controller
2.  Any roar legal 1s or 2s LiPo

Tires - Bearings
1.  Any foam or rubber tire
2.  Bearings or bushings allowed

3.  All cars must run the RJ Speed axle/diff configuration as found in the Legend/Spec 10 kits.

1.  Any body that covers the wheels.

***Only RJ Speed or TK Racing parts can be used.  No carbon fiber after-market chassis or parts.

***Anything not specified in the rules above is considered illegal.

                                             Mudboss Class Rules

(Last updated 2/26/2024)


1 Salvas MudBoss BODIES only
1.1 - Any minor modification to the body must be approved before being allowed
1.2 - The optional ‘NEXTGEN’ innerpanel is allowed and must be installed following the procedures (available June 2022)

2.1 - TRAXXAS 2wd (SLASH or RAPTOR) chassis only
2.2 - Original MFG suspension parts only, no other parts allowed (such as from RPM)
2.3 - Original MFG chassis parts only, no aftermarket hop-ups, no optional aluminum parts
2.4 - Front bumper, right side bumper and front body post brace must be removed
2.4.1 - Left side and rear bumpers can also be removed (if desired) **rear RPM bumper is allowed**
2.5 - TRAXXAS front optional bumper (TRA2735) can be used (angled down)
2.6 - Major alterations to the chassis or modification to drivetrain/suspension components is not allowed
2.7 - Electronics (rx/esc/amb) must be installed within chassis surface (no outside installation)
2.8 - Battery brace can be trimmed to allow different LiPo battery wire configuration

2.9 - Transmission must be in the stock rear mount position.

3.1 - Original TRAXXAS 2075 servo
3.2 - TRAXXAS 2075x and 2075r (servos) AND TRAXXAS 2072x (gear set) are allowed as ‘alternative’ parts/servos
3.2.1 - The SAVOX SC-0252MG Digital Servo is allowed, this is an ‘alternative’ servo
3.2.2 - SAVOX gear set (SAVSGSC0251MG) can be used to ‘upgrade’ the TRAXXAS 2075 to metal gears
3.3 - it is allowed to 'pin' the servo saver(white) or bell crank(black)...be advised the servo gears might get broken under a heavy crash
3.3.1 - original TRAXXAS plastic servo saver/bell crank only (white or black system) it is allowed to mix the components
(ie.. using black servo horn with white bell crank)
3.3.2 - It is allowed to use a solid (one piece) servo horn (any brand)
3.4 - 2-cell 7.4v LiPo battery with a maximum of 5200mah and 50c, with external plug only (no “bullet type” connector)

4.1 - TRAXXAS 76/83/86/90 spur with all transmission parts in place (slipper)
4.2 - Any pinion size
4.3 - No modifications can be made to the transmission’s case (ie.. to allow a bigger gear ratio)
4.4 - The gear cover must be off at all times to allow for visual inspection (CARPET)...and removed if asked (DIRT)
4.5 - The only adjustments allowed to the car are those allowed by the original MFG components of the car
4.6 - You are allowed to use any original wheel spacer combination (Black, Grey or any combination of both types)
4.7 - Transmission functionality rule (motor cannot spin while turning slowly one rear wheel a full turn)
4.8 - Traxxas SLASH *STEEL* transmission gears only (internal plastic transmission gears not allowed)
4.9 - Adding weight (in any way) is not allowed, wheel balancing is allowed (sole purpose of balancing, not to add weight)

5.1 - TRAXXAS 2WD plastic shocks only (grey or black version) (front shocks in front, rears in rear)
5.2 - Original Rear (TRAXXAS 5858) and Front springs (TRAXXAS 5857) (no LCG kit springs or aftermarket springs)
5.3 - Front springs may be cut in order to shorten them (no more than 5 round removed on ONE end)
5.4 - The shock’s travel may be shortened with internal shims (ie..fuel tube or solid shims...)
5.5 - Original shafts in original cylinder (length and type in proper cylinder)
5.6 - Original pistons from kit only (original 1,2 or 3 hole), no modifications can be made to them
5.7 - No front bump stop suspension, a single original blue bump stop can be used per rear shock (not mandatory)
5.8 - No shimming allowed (to reduce slop in suspension parts)
5.9 - All suspension parts (such as A-Arms) must remain in original positions it was designed for (no swapping left to right)
5.9.1 - rear camber links must remain in original height position (upper hole on shock tower not allowed)

7.1 - TRAXXAS Low CG chassis is allowed
7.2 - ROAR legal 13.5 sensored brushless motor (Stock 13.5/Spec) http://roarracing.com/approvals/print_brushlessmotors.php
(approval date is set to May 1st, 2022)
7.3 - a single motor fan can be used
7.4 - any ESC in BLINKY mode (ROAR software approved)
7.5 - JACO tires (JAC2055LP) only **can be trued** (must keep its FULL WIDTH, it is allowed to round the edges)
7.6 - Plastic Wheel caps are allowed with a max dia of 3.125” and must be secured with a min of 2 screws/wheel
7.7 - You may use a bead of “CA” type glue or ‘’tape’’ to the RIGHT FRONT tire side wall to reduce the car’s aggressiveness
7.8 - ODORLESS tire additives only (ie..SXT, J-DUB, PRP...)
7.9 - all other rules specified earlier in sections 1-2-3-4-5 stays the same​