Finding a 15" LT tire from a major brand will be the challenge.
That is why many of us went with the Michelin LTX (P) 235/75R15 XL tires on the factory 15" wheels. There is still adequate safety margin on the 27/28 models with 7,600 pound GVW even with the derating to 1,985 pounds per tire. The trailer axle will sit about 0.30" higher.
Click on images below my handle to see an image of the standard OEM tire beside both a 15": Michelin and later a 16" Michelin. The 16" tire only raises the axle 0.45" over the OEM GoodYear ST tires.
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WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
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