E rated tire with max psi of 65?
I have Nitto Ridge Grapplers that came on the truck when I bought it used, size LT325/65R18 E 127/124Q. Every E-rated tire I've ever seen is rated to carry its max load at 80psi, so the first trip ...
Forum Discussion
X2....N-Trouble’s comment/thoughts
Following is more rhetorical than anything...why are folks so hung up on a tires PSI rating...when most diss the GVWR/GCWR/MTWR/etc ratings ?...and recommend that they don’t really matter...
Selective adherence to ratings IMHO...
Most get away with that mentality & recommendations because designers have dialed in some level of margin (AKA...safety margin as most think it is). How much they dialed in and how much management told them to remove is a guessing game or more aptly lucky that they haven’t found where that line is...
Off soap box...
Burbman...I’d go down in width and go to a higher aspect ratio (Larger number, which is the percentage of section width) for your setup.
A higher profile tire’s sidewall will help when you go to the beach and that sand those beaches are famous for.
Airing down will have a higher profile tire’s sidewall ‘bulge’ more, which forms both a ‘wider’ footprint...and many don’t know that the tread will also ‘cup’ inwards, which helps ‘catch’ more sand and NOT slip as much. The higher the aspect ratio (higher number, or higher percentage) will allow the sidewalls to collapse more.
Also, with a higher profile tire aired down, the ‘aparent’ tire dia will be much larger than a lower profile tire. Around some old campfires, buddies and I noodled and came to a consensus that our tires were in the effective +8 foot diameter range.
Finally, note that squared off tread to sidewall transition area needs to be rounded. Street tires with a much more squared off (sharp transition) will dig better in soft stuff (dirt, sand, etc)
Edit...for those who don’t know...airing down is for very slow going ONLY.
If you plan to drive above, say, 10MPH with aired down tires...that will shorten your tires life greatly.
Go faster and you may not make it back to pavement with the tires in good condition.
Following is more rhetorical than anything...why are folks so hung up on a tires PSI rating...when most diss the GVWR/GCWR/MTWR/etc ratings ?...and recommend that they don’t really matter...
Selective adherence to ratings IMHO...
Most get away with that mentality & recommendations because designers have dialed in some level of margin (AKA...safety margin as most think it is). How much they dialed in and how much management told them to remove is a guessing game or more aptly lucky that they haven’t found where that line is...
Off soap box...
Burbman...I’d go down in width and go to a higher aspect ratio (Larger number, which is the percentage of section width) for your setup.
A higher profile tire’s sidewall will help when you go to the beach and that sand those beaches are famous for.
Airing down will have a higher profile tire’s sidewall ‘bulge’ more, which forms both a ‘wider’ footprint...and many don’t know that the tread will also ‘cup’ inwards, which helps ‘catch’ more sand and NOT slip as much. The higher the aspect ratio (higher number, or higher percentage) will allow the sidewalls to collapse more.
Also, with a higher profile tire aired down, the ‘aparent’ tire dia will be much larger than a lower profile tire. Around some old campfires, buddies and I noodled and came to a consensus that our tires were in the effective +8 foot diameter range.
Finally, note that squared off tread to sidewall transition area needs to be rounded. Street tires with a much more squared off (sharp transition) will dig better in soft stuff (dirt, sand, etc)
Edit...for those who don’t know...airing down is for very slow going ONLY.
If you plan to drive above, say, 10MPH with aired down tires...that will shorten your tires life greatly.
Go faster and you may not make it back to pavement with the tires in good condition.
