4 Rocks rules
1/10 Buggy Street Stock Rules
v1Class Rules2WD Buggy Street StockEffective Oct 16, 2026· Updated 7 days ago
Summary of recent changes
Winter Rumble classes and rules (Oct 2026).
Spec sheet
Motor & ESC
- Motor type
- spec
- Motor turn
- 13.5T
- ESC
- Blinky, 160 A limit
- Blinky mode
- zero_blinky
Battery & power
- Battery chemistry
- LiPo
- Cells
- 2S
- Max voltage
- 8.44V
- Hard case
- Required
Tires
- Spec tire
- Quasi Speed
Chassis & Suspension
- Chassis
- Buggy-based, no graphite; decking allowed; adjustable rear arms set at 0°
1.Motor & ESC
ROAR-approved 13.5 motor. ESC in blinky, 160 A ESC limit. Epoxy 13.5 motors are allowed at all events (one-year grace period; ROAR drops them for 2027).
2.Battery
2-cell hard-case LiPo, 8.44V max.
3.Chassis
Buggy-based, no graphite chassis. Decking allowed. Rear adjustable arms may be run but MUST be set at 0°.
4.Tires
Quasi Speed.
5.General
Tech table in place for events. Tire prep is allowed.