The XTREME HYBRID is like a Mountain Hybrid, but with a more aggressive tread for extreme conditions, with serious straight line drive for those soft hill climbs and muddy bogs. It has traction characteristics of a trials tire, with the dimensions of a serious off-road enduro tire to maintain the bike’s handling characteristics.Climbs like a trials tire, but much better in mud, sand, and a wide variety of technical single track terrain.Construction like a trials tire but with reinforced sidewalls to allow lower inflation pressure.Flexible tread concave and lock system for increased traction.Tread blocks with deep sypes for extra trials-like grip.100% Natural Rubber for durability and long wear life.DOT compliant and reversible.