I don't know about the bead lock tire/rim combo but I bet these guys will fill you up with information.........................

http://www.tacomaworld.com/forum/

I'm within a whisker of buying a Tacoma Dbl cab 4x4 SR5, it may even happen tonight. The dealers are really quite an embarrassment IMO. So woefully educated in the products they are selling. I REALLY pity the poor souls that go in and just except an offer right off the bat. Some of the salesman I have dealt with in the past few weeks are pitiful and the sales department borders on criminal!

Good luck E.