Quote:
Originally Posted by Javi
So, then.... it would be acceptable to replace an ST235/80R/16 with an LT235/85R/16 because SIZE does matter and the ST vs LT debate is dead... ? ? ?
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I doubt that the debate is dead as long as some want to treat all customers/RV owners as an un-informed mass.
End users are not
required to follow the regulations placed on Tire companies or RV assembly plants.
If you care about safety then you do need to follow the general guideline of ensuring that any replacement tire has equal or better specifications for Load and speed capacities. Some folks seem to have a difficulty in understanding the intent behind published standards and fall back on "Do exactly what the words say" nothing less and nothing more and certainly do not think for yourself.
Can you replace an ST235/80R16 with an LT235/85R16?
It depends.
What is the load capacity of the ST tire? 2,600# @ 50psi or 3,000# @ 65 or 3420 @ 80 psi ? The example didn't identify the Load Range. Is the ST rated for 65 mph or 75 mph or greater? again incomplete information was provided in the question.
LT235/85R16 in a single application could be rated for 2,623# @ 65psi or 3,042#@80 or 3,415#@95 and the speed ratings could be anything from N ( 87mph) to I suppose H (130mph)
So if the original tire was an ST235/80R16 LR-E Speed L then an LT235/85R16 LR-F Speed N would not be recommended by any competent tire engineer. maybe a tire salesman would as he wants to make the sale.