By manipulating the knob pattern found on the wet weather storm specialized have created a moto inspired knob pattern designed for moist and dry conditions alike the specialized hillbilly dh features knurled knob tops that boost traction on roots rocks logs off camber drops and just about everywhere else on the mountain complete with butyl inserts at the tyre bead we even have you covered against pinch flats when the trail gets particularly rowdy specialized hillbilly dh tyre features