The Thunderdome rules
17.5 Stock 1/12 (Oval)
v1Class Rules17.5 1/12 StockEffective Sep 5, 2025· Updated 3 months ago
Summary of recent changes
Official ThunderDome rulebook (rev 2025-09-05). Discipline: Oval.
Spec sheet
Governing
- Notes
- 3mm min ride height; battery max 90F; SXT Black sauce only
Motor & ESC
- Motor type
- Spec brushless
- Motor turn
- 17.5T
- Spec motor
- Tekin SPEC-R2 17.5 GEN4 (Elite/Pro)
- ESC
- Blinky / zero-timing (ROAR)
- Blinky mode
- zero_blinky
Battery & power
- Battery chemistry
- LiPo
- Cells
- 1S
- Max voltage
- 4.20V
- Hard case
- Required
Tires
- Spec tire
- 1/12 foam WGT stripe
- Tire additive
- Spec sauce only
Weight & body
- Min weight
- 850 g
- Body
- Any 1/12 NASCAR Cup style
Chassis & Suspension
- Chassis
- Any 1/12 pan car
1.Chassis Spec
Any 1/12th pan car.
2.Weight Spec
Minimum 850g 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
12th scale foam WGT stripe tires.
6.Motor Spec
Tekin SPEC-R2 17.5 GEN4 Elite #TT2690E / Tekin SPEC-R2 17.5 GEN4 Pro #TT2690P.
7.Body Spec
Any 1/12th scale NASCAR Cup style body. Option of rear wing or spoiler. Minimum body weight 90g; underweight bodies can only be corrected by adding weight to the roof. Removal of material from back of body is allowed.
8.Ride Height Spec
3mm minimum.
9.Race Spec
30 lap qualifiers / 50 lap mains.
10.Tire Sauce
SXT Black ONLY.