15" car tire on HD

well I may as well stir the soup too,..my '02 marauder is getting a BFG 155/80/15 mounted to it today,..the centerline type aluminum factory wheel is perfect for it, and with the hub bearings out, it'll fit right on the balancer machine,..dealer was very leary and told me it couldn't work on a leaning bike, yada yada yada,...til I told him it was for a hack,..then it was " right away, no problem sir",....go figure,

Thanks for all the information!! This gives me a chance to look deeper into the subject. I am just trying to be safe and (somewhat) sane!

KC