PT's RC Raceway rules
22s Losi Spec Sprint Rules
v2Class RulesLosi SprintEffective Oct 1, 2026· Updated 3 months ago
Summary of recent changes
Updated for the 2026/2027 season.
Spec sheet
Governing
- Governing body
- club
- Notes
- Spur stock LOS232038; pinion 19-22; shock/diff oil & springs open; no TLR Tuned optional parts; cooling fan allowed on waterfall; stick or shorty; PT's RC Raceway
Motor & ESC
- Motor type
- Stock / sealed
- Spec motor
- Spektrum SPMXSM4800 (stock only)
- ESC
- Stock Spektrum SPMX-1106 only
Battery & power
- Battery chemistry
- LiPo
- Cells
- 2S
- Max voltage
- 8.44V
- Hard case
- Required
Tires
- Spec tire
- Losi Hoosier soft (LOS-2442/2430) or hard (LOS-2418/2425)
Weight & body
- Min weight
- 2400 g
- Body
- Factory cage and panels; stock wings only; must retain nerf bars, driver, interior
Chassis & Suspension
- Chassis
- Losi Sprint
1.Body & wings
Factory cage and panels only; any color paint/decals. Must retain nerf bars, driver, and interior — no component removal. Stock wings only (any color paint/decals on panels).
2.Tires
Losi Hoosier soft (LOS-2442, LOS-2430) or hard (LOS-2418, LOS-2425) compounds only.
3.Electronics
ESC: stock SPMX-1106 only. Motor: stock SPMXSM4800 only (cooling fan permitted on waterfall). Any radio; servo open.
4.Battery
2-cell hard-case LiPo, 8.44V max (no burn-off). Stick or shorty.
5.Gearing & setup
Spur: stock LOS232038 only. Pinion: 19, 20, 21, or 22. Shock oil, diff oil, and springs: open. Minimum weight 2400 g.
6.Restrictions
No TLR Tuned optional parts allowed. PT's RC Raceway has final say on the rules of all classes.
Version history
v2Updated for the 2026/2027 season.
Aug 15, 2026v1Published.
Jul 28, 2026