Kempton Speedway rules
13.5 SC Modified Rules
v1Class Rules13.5 SC ModEffective Jul 28, 2026· Updated 3 months ago
Summary of recent changes
Current class specification.
Spec sheet
Governing
- Notes
- 4.22V/cell max; SCT-style shocks only; adjustable arms legal
Motor & ESC
- Motor type
- Spec brushless
- Motor turn
- 13.5T
- Spec motor
- Any ROAR 13.5T
- ESC
- Blinky / zero-timing
- Blinky mode
- zero_blinky
Battery & power
- Battery chemistry
- LiPo
- Cells
- 2S
- Max voltage
- 8.44V
- Hard case
- Required
Tires
- Spec tire
- DE GT6, Proline Hot Laps, or Louise SC-Rocket M
Weight & body
- Body
- Modified style; 1.5in max rear spoiler
Chassis & Suspension
- Chassis
- Factory-stock 2WD short course truck (rear or mid motor)
1.Chassis
Any factory-stock 2WD short course truck (rear or mid motor). No offset/LTO, woven-carbon, or double-deck chassis. Only SC parts.
2.Body
Any modified style; windows may be cut, sails intact (two-piece rear sail OK, no cutting rear sail). Roof and sides meet evenly. 1.5" max rear spoiler; no straight sail/sidedam; rear body must cover rear tires; no flopper bodies.
3.Motor & ESC
13.5T ROAR motor. ESC in blinky.
4.Battery
Any ROAR-approved 7.4V hard-case LiPo. 4.22V/cell max.
5.Tires
SC rule: DE GT6 (grooved or non-grooved), Proline Hot Laps, or Louise SC-Rocket M.
6.Other
SCT-style shocks only. Battery down chassis center; electronics anywhere. Equal-length arms, equal-offset rims. Adjustable arms legal.
Version history
v1Published.
Jul 28, 2026