I have my first full size class 1/2a truck. I have XL at best on it. Reality, at full psi, I have not had any issues hauling, towing upwards of 8000 lbs. Altho both trailer were a bit light on the hitch. I want to replace the tires I have, as they only really work on dry pavement, Put any amount of liquid or equal....worst tires I've had in many years, going back to late 70s using hwy bias ply tires were better than these!
With this said. I noticed no difference between 8ply and 10 ply 265-75-16 tires on my SW 3500's Ive had. Assuming I was under the 8 ply rating. I still only had the 10 plys at the same PSI, because if I put more than the typical 55-60 lbs I ran, the tires only contacted the middle part of the tread, not the outsides.
My gut feeling is frankly, you will not notice the difference, ASSUMING you have the same tire brand etc.
Change out from a cheap soft sidewall tire, to a stiffer sidewall tire of the same ply rating, you probably will notice the difference in handling. at least I have.
As also noted, "IS" your setup, setup correctly? If not, you WILL have issues with towing, handling etc. THAT is the first place you should look. not spending money on tires etc.
marty
