http://www.tiredefects.com/private_b...es/Default.htm
says they're made by Cooper, which is a good brand in my opinion.
Come to think of it, Montana has been using Tacoma tires for a year or more and I've not seen anyone post about blowouts or other problems with these tires. I've had blowout and defective tire problems with the Goodyear Marathons and have heard similar stories about the Michelin trailer tires. Maybe when it's time for new tires I'll look at Tacoma.
--edited-- Applejack, you're faster than me and must have posted that while I was still searching for an answer. Glenn, I hope the Firestones turn out to be good tires for you. I really liked the Firestones on our '99 F350, enough that when it was time to replace I got the same thing. This one has B.F. Goodrich, which I've also had good luck with in the past and I like them so far.