can also be differences if talking rags or radial . I have only ever run radials so cant talk for rags . I have run MT and Hoosier , 275s then 29.5/30s. Hoosier was always lighter and a little quicker , MT lasted way better . There is a rather limited choice here in Oz lately , no MT pricey Hoosier . Hoosier in current size 29.5x10.5 will give barely half the laps of the MT PBR . So now I have a set of Goodyear radials , they seem good so far after first 8 passes . No apparent breakin needed , just straight at it and same 60s etc . BUT do have specific mount directions for initial running .

Tex