Replacing P series with LT on a 1500 Sierra
My 1500 series Sierra came with P265-65-R18 from the factory. The tires have been OK, but I've always found that when loaded (even with the WDH) the steering is a bit loose. In speaking with others ...
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Shouldn't be any problem. I'd recommend replacing your valve stems with higher rated ones, though. The lower ones tend to leak more air over time than the higher ones.
Etrailer.com has them, just get the length and diameter you need. Call and tell them what you have and they will help you select. Hint: the smaller diameter fits passenger vehicles (non-commercial)
You are likely to be floored at the improvement under load with the stiffer tires. I now have 10ply on my 4Runner (60 psi empty, 70 psi towing) and it is rock solid, even near the max tow rating and 60-70mph.
Etrailer.com has them, just get the length and diameter you need. Call and tell them what you have and they will help you select. Hint: the smaller diameter fits passenger vehicles (non-commercial)
You are likely to be floored at the improvement under load with the stiffer tires. I now have 10ply on my 4Runner (60 psi empty, 70 psi towing) and it is rock solid, even near the max tow rating and 60-70mph.
