The 15" market is dominated by Cooper - who also makes Dean, Mastercraft, Avon, Mickey Thompson ST for RWL, S rated 15", Mickey Thompson SR for BSW, H rated 15".

BFG has also all but abandoned the 15" market as their molds were sold to Coker. and many sizes discontinued.

Also out there - Maxxis, who makes predominately ATV and motorcycle tires, but they have moved in to car and truck applications as well.

Of course there is also Coker and Diamond Back for more vintage, cruiser tpye bias play and radial stuff.