if you put 6-ply tires on you don't have to worry bout flat tires out in the middle of nowhere cause you can always limp it back out and not worry bout ruining the rim. but i had to put a tube in my other pair of 27 inch itp 589's cause i sliced the sidewall on a nail or something i dunno what it was so i drove it home slow sold the tires to dad he put them on his foreman and has been running them for a couple years now and still holds air like a champ [img]i/expressions/face-icon-small-smile.gif[/img] BTW WOOHOOO this is my 999th post.