4 Rocks rules
Mod Sprint Rules
v1Class RulesOpen SprintEffective Oct 16, 2026· Updated 7 days ago
Summary of recent changes
Winter Rumble classes and rules (Oct 2026).
Spec sheet
Governing
- Governing body
- DODC
Motor & ESC
- Motor type
- Open
- Motor turn
- Modified / open
- ESC
- Any ESC, any mode
Battery & power
- Battery chemistry
- LiPo
- Cells
- 2S
- Hard case
- Required
Tires
- Spec tire
- Quasi Speed
1.Governing rules
DODC rules apply.
2.Motor & ESC
DODC modified motor rules. Any ESC, any mode.
3.Battery
2-cell 7.6V hard-case LiPo.
4.Tires
Quasi Speed.
5.General
Tech table in place for events. Tire prep is allowed.