Thor Forums

[Jefvm]

Originally Posted by Beau388

Early Ford F53 chassis rated at 22,000 lbs and under came with 6x19.5 rims. Later coaches came with 6.75x19.5 inch rims. The 225/70-19.5 tires go with the narrow rims and the 245/70-19.5 tires go with the wider rims. If the wider tires are used on the narrow rims, the dual rear tires will rub against each other and soon overheat and blow out.

Yes I have researched my RV and it is a 2012 ACE EVO 29.1.
Based on my findings this unit should have 225/70R19.5 128/126 F rated tires.
The original “F” load range called out a 12 ply tire with the 128/126 3968 lbs load per tire or 3748 per pair of tires. So I figure if I stick tire size and load index and anything above load rang F I should be ok.
You are correct the later version they switched to the 245 series tire.
Any opinion on tire preferences for ride or stability