The Thunderdome rules
World GT-R (On-Road)
v1Class RulesWorld GT-REffective Sep 5, 2025· Updated 3 months ago
Summary of recent changes
Official ThunderDome rulebook (rev 2025-09-05). Discipline: On-Road.
Spec sheet
Governing
- Governing body
- ROAR
- Notes
- 200mm max width; WB 254-267mm; 5mm min ride height
Motor & ESC
- Motor type
- Spec brushless
- Motor turn
- 17.5T
- Spec motor
- Any ROAR-legal 17.5
- ESC
- Blinky / zero-timing
- Blinky mode
- zero_blinky
Battery & power
- Battery chemistry
- LiPo
- Cells
- 1S
- Max voltage
- 4.20V
- Hard case
- Required
Tires
- Spec tire
- Rubber (CRC #2314 / eXcelerate XCE-3077)
- Tire additive
- Spec sauce only
Weight & body
- Min weight
- 1025 g
- Body
- World GT-R approved 190mm or 200mm
Chassis & Suspension
- Chassis
- 1/10 200mm pan car (WGT)
1.Chassis Spec
1/10th scale 200mm pan car chassis (WGT Car).
2.Weight Spec
Minimum 1025g 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 1 cell Lipo hard cased. MAX temp 90F at tech table. 4.20 MAX VOLTAGE.
5.Tire and Wheel Spec
Rubber tires / CRC #2314 / eXcelerate XCE-3077. Sidewall glueing allowed.
6.Motor Spec
Any ROAR legal 17.5.
7.Body Spec
Any World GT-R approved body 190mm or 200mm.
8.Ride Height Spec
5mm minimum.
9.Width Spec
200mm max width.
10.Wheelbase Spec
Minimum 254mm / maximum 267mm.
11.Race Spec
5 minute qualifiers / 5 minute mains.
12.Tire Sauce
SXT Black ONLY.