An some one plz tell me what's the dif btwn tyres size. Some people say 285x75 and others refer to them as 32 how on earth do u calcite is there some sorts of covert ion factor I've tried mm cm inches everything no luck . I know the 285 is the width and 75 the profile but what do people mean when they say 32 or 33 or 35 I need I mean me and friends are puzzled
