17.5 Stock 1/12 (Oval)

Class Rules17.5 1/12 StockEffective Sep 5, 2025· Updated 1 month 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

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.

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.