High Road R/C Raceway rules
13.5 SC B-Modified Rules
v1Class Rules13.5 SC ModEffective Jul 28, 2026· Updated 3 months ago
Summary of recent changes
Current class specification.
Spec sheet
Governing
- Governing body
- ROAR
- Notes
- SCT big-bore shocks only; battery down chassis center; equal-length arms.
Motor & ESC
- Motor type
- Spec brushless
- Motor turn
- 13.5T
- Spec motor
- Current 13.5 ROAR motor
- ESC
- Open ESC in blinky
- Blinky mode
- zero_blinky
Battery & power
- Battery chemistry
- LiPo
- Cells
- 2S
- Max voltage
- 8.44V
Tires
- Spec tire
- Proline Hot Lap, DE Racing grooved/non-grooved
Weight & body
- Body
- Midwest Modified body; 1.5" max rear spoiler
Chassis & Suspension
- Chassis
- Any off-the-shelf 2WD short course truck; stock OEM chassis
1.Chassis
Any off-the-shelf 2WD short course truck; no purpose-built oval chassis or conversions. Stock OEM chassis, battery orientation, and shock towers.
2.Body
Midwest Modified body; windows may be cut, sails intact (two-piece rear sail OK). 1.5" max rear spoiler; end caps even with spoiler height. No straight sail/sidedam; rear body must cover rear tires.
3.Motor & ESC
Current 13.5 ROAR motor. Open ESC in blinky. 2S LiPo, 8.44V max.
4.Tires
Proline Hot Lap, DE Racing grooved or non-grooved.
5.Other
SCT big-bore shocks only. Battery down chassis center. Equal-length arms, equal-offset rims. Adjustable arms legal.
Version history
v1Published.
Jul 28, 2026