Looking to have new tires put on recently purchased OEM wheels 15"x5.5" and struggling to find a shop that will install. Looks like the original tires were 28"x8.5" and I wanted to use BFG AT 30/9.50 R15 or 235/75 R15 but cannot find a tire shop that will mount them... What sizes are y'all running on the OEM wheels? Any suggestions?