The hillbilly dh 650b 275 wired mtb tyre from specialized is a downhill tyre built to dismantle the most rugged descents whether they are moist or bone dry the tyre features tall wide spaced knobs designed to sink into loose soil to give you grip when most other tyres wouldnt the soft rubber compound also helps give a little more traction on wet roots or rocks and is teamed with dual ply casing to protect you from flats when you decide its time to really send it on the big lines avail