ST Tire "Plies" Question and a PSI Question
(BTW I am aware of the various "issues" concerning Carlisles, Marathons, and ST vs LT, having read many tire threads here over the years. Moving right along then-- :) My 2002 built OEM Goodyear Ma...
Forum Discussion
JIMNLIN wrote:
OK different topic, but I don't want two threads. For weight carrying, I only need Cs at 50 PSI, but now I have these Ds carrying the same weights. I know my truck tires have "adjustable" PSIs based on the load they carry up to a max rating.
What about the STs? Do I pump the Ds to 65 or go with something less since they will not be "loaded" fully? Thanks.
you have two things going here.
1. The advantage of the D tire comes only at those higher pressures.
2. Carlisle says;
-Maintain air pressure at the maximum PSI recommended on the tire sidewall.
The Warranty is void if the tire or wheel fails due to damage from improper inflation pressures, exceeding the maximum speed limit, or overloading the tire beyond the maximum load capacity stated on the sidewall.
Protect that new tire warranty and run them at 65 psi if the wheels are rated for those higher pressures.
I agree with everything you have stated about Carlisle, but Carlisle also states the #1 criteria is correct tire selection, so assuming the original C tires were sufficient for the trailer's GVWR and therefore had some margin for actual loaded weight, then the D tires are the wrong tires for this application. Especially if the wheels are not rated for 65 psi. Carlisle also states the 65 mph speed rating does not apply to actual use and limits actual speed to 60 mph.
