Originally Posted by simply40
I know this has been discussed (I did a search but no answer)so if moderators want to delete or move I understand.
I have a 30 foot 5th wheel, I have 3 ea Marathon ST225/75R15 tires rated D and 1 rated C. Should I buy a new D or will I be OK running 3@ 65lbs and 1@ 50lbs?
I would replace the C Load with D load to be safe. While weight may indicate the C is okay, I doubt running at different air pressures helps and RV builders tend to under build. I replaced my D rated with E rated and ran at 70-75 lbs. More capacity than the Ds at 65, but not as bouncy as 80 lbs.
2015 F350 XLT PSD CCSB SRW, Andersen Ultimate hitch
'12 Cougar High Country 299RKS, Mor/Ryde Pinbox
1/77 Armor Bn, 5th Mech, I Corps