Just in case any one is interested, somehow I ended up with 15" wheels on my 3100. BUT if you go to Les Schwab they have a 7.00-15 LT radial that is 29 and some inches tall. That according to the description the fella gave me (they need to order them in, and they don't have a photo) should have a relatively proper look for one of these trucks. At least for a modern tire. A whole set mounted and balanced runs around $850 with WA state sales tax ($157 per tire, for tires alone)
