Iowa Fast Track RC rules
Mod 4WD Buggy Rules
v1Class Rules4WD Mod BuggyEffective Aug 16, 2026· Updated 2 months ago
Summary of recent changes
Published (2025 Iowa Fastrack classes).
Spec sheet
Governing
- Notes
- 6-cell NiMH or 2S hard-case LiPo
Motor & ESC
- Motor type
- Modified brushless
- Motor turn
- Modified / open
- Spec motor
- Any brushless (typ. 13.5T and lower)
Battery & power
- Battery chemistry
- Any
Tires
- Spec tire
- 2.2 buggy wheels/tires
Weight & body
- Body
- Any 4WD buggy body for the class
Chassis & Suspension
- Chassis
- Any 1/10 off-road 4WD buggy (e.g. Tekno, Associated, TLR, XRAY, Yokomo)
1.Who it’s for
Intermediate and advanced racers running 1/10 4WD buggies.
2.Chassis
Any 1/10 off-road 4WD buggy chassis (e.g. Tekno, Team Associated, TLR, XRAY, Yokomo).
3.Motor
Any brushless motor — generally 13.5T and lower.
4.Batteries
6-cell NiMH or 2-cell hard-case LiPo.
5.Tires & body
2.2 buggy wheels/tires — square-lug styles work well; any tire designed for the class. Any 4WD buggy body intended for the class.
Version history
v1Published.
Aug 16, 2026