[ccjohnson]

I did notice some "granulating" on one tire before replacing it. Had been running about 70 mph for around 60 miles in a hurry from Kingman to Phoenix with ambient temp +/- 118F. At that point when I noticed the 'granulating upon arrival I slowed down to 55 max until replacing tires. I agree heat was major factor, but chemical issues from road do not explain why drives have normal wear. They travel on same surfaces. At 20K wt on drive duals they would also not be severely overloaded. Tommy Key has always encouraged me to run H on at least steer if not all axles. I will definitely be following that advice from here on. Also I don't feel the ' road wandering" as before on load range G steers. Much easier to keep in a straight line now.