A 5 inch backside wheel should clear allaround with a 17x9.5 wheel 275 40 17 in front will work but will probablly track in road groves real bad . I think in 17 inch size , 17x8 in front with 245 45 17 and 285 40 17 in back on a 9.5 or 10 wide rim 4.5 back side all around . Also , on a large B boby a 26 inch tire is a bit short and a 285 40 18 inch size in back looks nicer at 27 inches tall . 5 inch back side is usually the most back side you can use without rubbing .