LOSI 22s Dirt Late Model (Box Stock)

Class Rules1/10 Losi Dirt Late ModelEffective Aug 4, 2026· Updated 1 month ago

Summary of recent changes

Initial rules (2026-08-04).

Spec sheet

Governing

Notes: Box stock; max battery temp 90F; SXT Black sauce only; Losi springs only, no added weight.

Motor & ESC

Motor type: Stock / sealed
Spec motor: Stock SPMXSM4800
ESC: Stock SPMX-1106 Firma 45 Lite

Battery & power

Battery chemistry: LiPo
Cells: 2S
Max voltage: 8.40V

Tires

Spec tire: Losi Hoosier spec (LOS-4247/4237/4641/4642)
Tire additive: Spec sauce only

Weight & body

Body: Losi 22S Dirt Late Model body w/ driver, interior, cage; stock spoiler only

Chassis & Suspension

1.Chassis Spec

RTR LOSI 22s Dirt Late Model. All parts ran in stock location. No heating and bending parts or removing any plastic from spitters.

2.ESC

Stock SPMX-1106 Firma 45 Lite in stock location. IC5 connector.

3.Battery Spec

Spektrum SPMX-1087, SPMX50002S30H5, or SPMX52S30H5. MAX temp 90F at tech table. 8.40 MAX VOLTAGE. Battery allowed anywhere within stock battery box.

4.Tire & Wheel Spec

LOSI Hoosier Soft Black wheel (LOS-4247), Medium Black (LOS-4237), Soft Aluminum (LOS-4641), or Medium (LOS-4642). Sidewall glueing allowed.

5.Motor Spec

Stock SPMXSM4800. Any 30mm x 30mm fan allowed in stock mounting location.

7.Miscellaneous

Transmitter Spektrum SLT2 or SLT3 & SR215 receiver. LOSI springs only. NO added weight on chassis. Servo (stock) SPMS684. Spur (stock) LOS232038 & pinion (stock) TLR332020. Shock oil & diff grease open. BOX STOCK besides — any LOSI/TLR ball cups or turnbuckle-rod ends allowed; plastic servo arm allowed.