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Slideways RC rules

2027 Traxxas Mod Rules (B Mod & Crate Mod)

v2
Class RulesTraxxas ModifiedEffective Oct 16, 2026· Updated 16 days ago

Summary of recent changes

2027 class lineup and rules (posted Oct 2026).

Spec sheet

Governing
Notes
Box stock; only shock oil change allowed. Must run 86/23 gear, stock blue springs, hexes in stock location, stock radio, front/rear tires in stock locations.
Motor & ESC
Motor type
Spec brushed
Motor turn
N/A (brushed)
Spec motor
Traxxas Titan 12T 550 brushed or Traxxas BL-2 (no mods, no fans)
ESC
Traxxas XL-5 or BL-2
Battery & power
Battery chemistry
LiPo
Cells
2S
Tires
Spec tire
Traxxas Slash/Mod Hoosier, Pro-Line Hot Lap, Duratrax Bandito
Weight & body
Body
Open-wheel modified body; 1" spoiler w/ 1/4" flip; max 13" W × 8" H × 26.5" L
Chassis & Suspension
Chassis
Stock Traxxas Slash 2WD chassis (no LCG); Crate Mod option box stock

1.Overview

Two ways to run Traxxas Mod in 2027: Option 1, B Mod (built Slash 2WD, rules below), or Option 2, Traxxas Crate Mod (stock out of the box with a few allowed changes).

2.B Mod: Chassis

A. Must use stock Traxxas Slash 2wd chassis and components (TRA5822 Gray or TRA5822A Black). B. All suspension components must be installed in the same position and proper orientation as they would come in a factory assembled kit. (Modifying, replacing, or removing any components, unless otherwise specified, is not legal!!!) C. All Traxxas branded "Slash specific" molded replacement and aluminum upgrade parts are legal. (Exception: LOW CENTER OF GRAVITY (LCG) CHASSIS, Sway bars, 17mm hubs/nuts, and Ball Differentials are not legal) (ANY ALUMINUM BELL CRANK ALLOWED) D. All RPM Branded "Slash specific" molded replacement parts are legal. (Exception: Low CG Chassis, Gearbox housing, rear inner suspension mounts, and internal shock parts are not legal) E. The rear bumper must remain intact ( Stock or RPM). Front bumper is optional, but strongly recommended. Front nose must be securely attached and CAN’T DIG INTO THE TRACK! F. Any brand of body mounts, and mounting components may be added for the specific purpose of mounting the body. G. The rear differential may NOT be modified or locked in any way. The differential must have normal diff action, and cannot turn the motor over when rotating one rear tire against the normal resistance of the motor. H. Additional weight may be added but must be within the main chassis plate area. NO WEIGHTS CAN BE ATTACHED TO SUSPENSION PARTS IN ANY WAY! I. The battery must be located within the battery tray in the center of the chassis. It may be moved forward or rearward within the tray to change weight distribution. The Electronic Speed Control (ESC), Receiver, and Transponder, must be mounted within the chassis area. J. Factory wheel spacers (hexes) may be moved to any position, but are limited to the 2 short (black), and 2 long (gray) that comes in the kit. K. Any Traxxas Slash tuning springs is allowed. Spring may not be altered in any way. L. Internal shock limiters and external spring pre loaders are legal. M. Any weight shock oil may be used. Shock piston must remain stock. N. Must run a spur gear cover at all times!!!! NO exceptions!!!

3.B Mod: Motor

A. Traxxas Titan 12t 550 Brushed Motor or Traxxas BL-2 only. NO modifications to the motor. Factory wires and bullett connectors must remain in place. NO Fans!!

4.B Mod: ESC (Electronic Speed Control)

A. Traxxas XL5 Brushed Speed Contro or Traxxas BL-2 only. Battery connector may be replaced (Direct solder to the battery is not legal) No Fans!!

5.B Mod: Battery

A. Any 2 Cell lipo battery (HARD CASE ONLY!!!!!!!) B. 6 or 7 cell Nimh batteries are legal.

6.B Mod: Radio System

A. Transmitter/Receiver/Servo may be replaced. Servo Saver may also be replaced or pined. B. Driving Enhancement Devices such as a Gyro are not legal!!!!!!!! C. Radio systems that come equipped with a Stability Management feature must be in the disabled mode!!!

7.B Mod: Tires/Wheels/Inserts

A. -Traxxas Slash Tires (BFG, KUMNO, SPEC (S1 COMPOUND ALLOWED) -Traxxas Mod Hoosier -Proline Hot Laps or Duratrax Bandito S/C style only B. Aftermarket short course closed cell tire foams are allowed. C. Tires cannot be ground to slicks. Tire face must have a minimum tread depth of .065". D. Extra grooving, splicing, or siping of the tires is not permitted. E. Only Short Course 3.0" x 2.2" wheels allowed. Aftermarket wheels allowed including bead locks.

8.B Mod: Body

A. Must be made of Lexan and resemble a UMP, IMCA, or USMTS Open Wheel Modified. B. All lexan body parts should be rounded off to eliminate sharp edges. C. Body must cover the rear wheels as viewed from overhead. D. Wheel wells must be fully open showing the sidewall of the tire. E. Front wheels must remain open. F. Rear spoiler- 1” Spoiler with ¼” flip. Must not exceed the width of the body. G. End caps allowed. A center support brace is allowed, but must remain same size and shape as the end caps. H. End Caps must be angled and resemble those of a full scall Modified. End Cap maximum height is 1.5" and maximum length is 3". I. Max body dimensions: Width- 13", Height-8". J. Max overall length of body including spoiler: 26.5" K. Bodies should be attractively painted and must have numbers on the doors and roof. L. All windows must be clear or cut out. Faux window decals are also allowed.

9.Crate Mod (Option 2)

1. MODS ALLOWED 1. TIRES-TRAXXAS HOOSIER OR S/C PROLINE HOT LAP/BANDITO 2. GEAR-86 or 90 spur with 19 thru 24 pinion 3. Radio-can upgrade radio 1. Driving Enhancement Devices such as a Gyro are not legal!!!!!!!! 2. Radio systems that come equipped with a Stability Management feature must be in the disabled mode!!! 2) Otherwise, must remain a Stock out of the box Traxxas Crate Mod including Body. (Rear Bumper can be changed)

10.Track rules

Slideways management reserves the right to change or modify rules at any time.

Version history

v1Published.
Jul 28, 2026