You've had some intelligent (and some less intelligent IMO) suggestions. The reference to Bridgestone's booklet is very good.I'm make a road trip to Florida Friday with a fully loaded [weight wise] 98 RAM 1500. We're bringing a small lathe, tools, 60 gallon compressor etc. The tire placard says 41 psi, the tire says 80 psi. What pressure do you tire experts suggest?
OK, so, let's use this document from Toyo:The truck in question is my brother's, I'm helping him move this weekend so I'm not 100% certain of the tire sizes. IIRC it's 245/75R16 on the placard. I'm not sure on the LT tire size on it now, only that it's a 16" tire with 80psi on it.
Woah I need a link to that!OK, so, let's use this document from Toyo:
We see that that size of tire, at 41psi, has a load carrying capacity of 2,469lbs:
View attachment 102178
So, we divide that by 1.1 to get the load capacity per the OEM, which is 2,245lbs.
Now, if we go to an LT in the same size:
View attachment 102180
View attachment 102181
We see that we get 2,335lbs at 55psi. So, your proper inflation pressure is 55psi.
Link is the first one there, should be able to download the PDF.Woah I need a link to that!
Nary identical to what I got using the load tablesWhat is very likely here is that the original P245/75R16's were replaced by LT245/75R16's - and in that case, the pressure would be 15 psi MORE than the placard pressure = 41+15 = 56 psi.