At 48mm wide, the Switchback hill tire is truly an all road tire. This 650b tire will fit on many 'all-road' and 'gravel' bikes that are all the rage today (including the Kona Roves that we have!). It's smooth file-tread will gobble up gravel with ease. The supple casing deforms easily, turning rough roads into smooth dream worlds. This is no exaggeration. Try them out!