A chassis meant for 70 mph tarmac pulls must also endure the unpredictable abuse of rocky ridgelines and tree-rooted singletrack. The Altis Sigma strikes this balance with a cast aluminum cradle frame and fully adjustable suspension boasting nearly 10 inches of wheel travel.
At high speeds over rutted dirt roads, the bike tracks with surprising composure. The 187-pound curb weight works in its favor here. It is heavy enough to resist being deflected by loose rocks, yet light enough to brake later than a 240-pound traditional enduro bike.
However, tight technical trails expose the sheer power of the Sigma. Cracking the throttle in Race mode when navigating rocky switchbacks can instantly loop the machine. Experienced off-road riders spend most of their time in intermediate modes, reserving the full 22kW output for sand dunes, hill climbs, and fast fire roads where high-RPM momentum is non-negotiable.
