in addition to LS -- Tiny's Tire, S&S Tire both in Tacoma. Or any commercial truck service center, like Goodyear in Fife.
**DO NOT go to Pep Boys.**
They sold me a set of 6 for my new truck, assured me they could mount and balance 19.5s. They took my money, ordered them, they showed up a week later.
I spent 3 HOURS there only for them to not only tell me they couldn't balance then, they COULDN'T EVEN INFLATE THEM!!! Their air chuck only went to 90 psi, I bought 16 ply requiring 110psi.
Then... they told me they found out the hard way they couldn't balance them---after they had dismounted one and did not mark the old tire to rim position. I canceled the whole thing, they put the old one back on, and sent me out with a completely unbalanced tire.
I spent another hour the next day waiting my turn at Les Schwab getting that one tire re-balanced.
This all happened a week ago......