Losi 22S Sprint Spec Rules

Class RulesLosi SprintEffective Oct 16, 2026· Updated 7 days ago

Summary of recent changes

Winter Rumble classes and rules (Oct 2026).

Spec sheet

Governing

Notes: Spec class: stock electronics, gearing and battery; Losi springs only; no added weight; no TLR tuned parts.

Motor & ESC

Motor type: spec
Spec motor: Stock SPMXSM4800
ESC: Stock SPMX-1106

Battery & power

Battery chemistry: LiPo

Tires

Spec tire: Losi Hoosier soft/hard

Weight & body

Body: Stock cage, panels, nerfs, driver and interior; stock wings

1.Body

Stock cage and panels, any color. Panels can be painted or decaled. Must run all nerf bars, driver figure and interior; nothing can be removed.

2.Tires & wheels

Losi Hoosiers, soft (LOS-2442, LOS-2430) or hard compound (LOS-2418, LOS-2425).

3.Wings

Stock wings, any color. Panels can be painted or decaled.

4.Electronics

ESC: stock (SPMX-1106). Motor: stock (SPMXSM4800), fan on the waterfall allowed. Servo: stock (SPMS684). Receiver: stock (SR215). Transmitter: SLT2 or SLT3.

5.Gearing

Spur: stock (LOS232038). Pinion: stock (TLR332020).

6.Battery

Stock only: SPMX-1087, SPMX50002S30H5 or SPMX52S30H5.

7.Suspension

Shock oil and diff oil open. Losi springs only. No added weight. No TLR tuned optional parts.

8.General

Tech table in place for events. Tire prep is allowed.