The Thunderdome rules
F1 (Oval & On-Road)
v2Class RulesFormula 1Effective Sep 5, 2025· Updated 3 months ago
Summary of recent changes
Official ThunderDome rulebook (rev 2025-09-05). Discipline: Oval & On-Road.
Spec sheet
Governing
- Notes
- 190mm max width; SXT Black only
Motor & ESC
- Motor type
- Spec brushless
- Motor turn
- 25.5T
- Spec motor
- Any ROAR-approved 25.5
- ESC
- Blinky / zero-timing
- Blinky mode
- zero_blinky
Battery & power
- Battery chemistry
- LiPo
- Cells
- 2S
- Max voltage
- 8.40V
- Hard case
- Required
Tires
- Spec tire
- Rubber tires made for F1 cars
- Tire additive
- Spec sauce only
Weight & body
- Min weight
- 1030 g
- Body
- Any USVTA F1 approved body
Chassis & Suspension
- Chassis
- Any commercial F1 kit, 2008 or newer
1.Chassis Spec
Any commercially available F1 car kit. Formula 1 cars from year 2008 and newer that are a realistic representation of an original FIA Formula 1 car may be raced in this class.
2.Weight Spec
Minimum 1030g in race-ready trim.
3.ESC
Any ESC that is ROAR approved and running in ROAR approved "Blinky" spec software.
4.Battery Spec
ROAR approved 2 cell Lipo hard cased. MAX temp 90F at tech table. 8.40 MAX VOLTAGE.
5.Tire and Wheel Spec
Rubber tires specifically made for F1 cars. Sidewall glueing allowed.
6.Motor Spec
Any ROAR approved 25.5.
7.Body Spec
Any USVTA F1 approved body.
8.Width Spec
190mm max width.
9.Race Spec
30 lap qualifiers – 50 lap mains (OVAL) / 5 minute qualifiers – 5 minute mains (ON-ROAD).
10.Tire Sauce
SXT Black ONLY.
Version history
v1Published.
Jul 28, 2026v1Pre-official seed content (archived before load)
Aug 3, 2026