Load Range E Tires
I had Goodyear Marathon 15" ST225/75/15 load range D tires on my Jayco and experienced nothing but problems. Between blowouts and ply seperations I had it. I recently switched to Denman ST225/75/15 load range E radial tires rated for up to 90 psi. After experimenting with pressures, I settled on 65 psi cold, which is 75 psi hot. No problems after many miles. They run only slightly warm to the touch at 65 mph speeds. Cost was around $400 out the door. Just another option.
2005 Chevy 2500HD, CC, SB, 4X4, Duramax, ARE Topper, 60 gallon RDS toolbox/tank combo, Kennedy Headlight Booster, Isspro pyrometer and boost gauges, EGR Blocker, PCV Kit, Bilsteins, 265 Michelin MS-2, TTS Exhaust, pulling 35' Jayco travel trailer.