The surly dirt wizard 275x3 mtb tyre the dirt wizard 275 tire uses the same aggressive tread our other plus sized dirt wizard tires use with tread block sizes optimized for the specific 275 casing if yoursquore not familiar itrsquos a tire focused ndash much like a laser ndash on providing traction and control on the kinds of surfaces where traction and control are nary to be found while the tread is the same reliable tread wersquore all used to the 275 wizard conjured