I've been running the Sailun S637 tires since last spring. Only have about 4K miles on them though. Seem to be well built - very heavy compared to the lightweight Towmax tires they replaced. Not as pricey as the Goodyears but, still a good chunk of change - as are most things up here in Canada! Got them at Kal Tire in Victoria for around $1250.00 all in. That includes mounting, balancing, high pressure metal valve stems and of course, the provincial "Advance Disposal Fee"! Could have saved about $50.00 per tire buying them south of the border but, that was before our dollar started tanking.