Not only does Specialized consider the Purgatory GRID 2Bliss to be its standard for light trail performance, it's made all the more versatile with a redesigned tread that bites soft soil and supports hard-pack. It's a tire you can rely on at quick brakes due to the increased ground contact, adhesion, and flexible center sipes. Specialized reinforces the sidewalls with a GRID casing for greater protection against cuts and flats. Gripton rubber excels at wet and dry surfaces too.