The 2026 Arctic Cat M 858 154 HCR features an 858cc, 2-stroke engine, a 154-inch track with a 2.60-inch lug, and the ALPHA ONE rear suspension. It includes FOX 1.5 ZERO QS3 ski shocks and FOX 2.0 ZERO QSL rear shocks, along with a Stealth 88 hydraulic brake and a Sport gauge. Key highlights are its lightweight design and enhanced maneuverability for mountain riding.