For all of you out there with 265/70/17 (E), do your tires feel extremely heavy and really hurt your gas mileage? Still thinking about going 255/75/17 in load C.
AH I see, its the only option in the tire brand and size that your after.Well I really like 265/70.. But nothing more than the occasional boat or jet ski tow and a trailer full of trees. However they don't have Cooper STT's in a 255/75 so that's primarily my reasoning.
Even with P265/70R17's - my mileage is not great - but then again, it never really was.For all of you out there with 265/70/17 (E), do your tires feel extremely heavy and really hurt your gas mileage? Still thinking about going 255/75/17 in load C.
I usually just use the eyeball test for my tires PSI - usually lands me at around 42 PSI with the TOYO P265/70R17's I'm running right now.It's worth noting that you shouldn't fill E tires to their recommended maximum PSI. 80 PSI is meant to handle the additional weight of heavy duty trucks and trailers, and will keep the tires from flexing under the weight. However, an XK weighing around 2.5 tons, the 80 PSI is excessive and will cause uneven wear as the weight won't cause the tread to be fully in contact with the road.
A good way to determine what tire pressure you should run is to use chalk to determine what section of tread is contacting the road. You can dust the pavement with chalk, roll your tires over it, and look at the markings left behind. You ideally want all of the tread to be touching, which should happen around 35-40 PSI. Start higher, around 50, and slowly air down until you find the point where all tires touch. Also take into account the fact that at highway speeds your tires will probably increase 2-3 PSI, so drop your pressure down a couple PSI.
You can also just run your tires at the recommended PSI on your door sticker. Jeep took the time to test what PSI works well, and this PSI will transfer pretty well across tire ratings.
Doing it by eye is usually more than accurate enough. The main thing is to set pressure properly and not to just max out the tire.[
I usually just use the eyeball test for my tires PSI - usually lands me at around 42 PSI with the TOYO P265/70R17's I'm running right now.
Mine originally had 245/70/17 load range c's on factory commander rims. I drove it that way for a few months. I then swapped on load range e 245/70/17's on 2011 Grand Cherokee rims. I hunt in the fall and the terrain can be quite harsh. Ten ply tires are a lot harder to puncture. The sidewalls don't sag either. I noticed absolutely no difference in fuel economy.
The longevity doesn't change because the reinforcing ply's are not rubber. The rubber content stays the same. What kind of wheels are you looking at?
This might help;See? That is what I was thinking with the 10 ply. Seems like they would be harder to puncture. To answer your question on what wheels... I am trying to find something in that 8" or maybe 8.5" wide wheel. One choice would be the XD 775 Rockstar in 8" with a +10 offset giving me a 4.9" backspace. I'm finding 8" wide wheels are not too common for the jeeps. I'm finding a couple other options on the 8.5" wide with a +10 offset for a 5.2" backspace. I know the backspace offset is a whole nother question, which I won't delve into here. Thanks for the thoughts!