P or LT rated tires?
- Thread starter skibama
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I sure like the LTs over P-rated. Biggest reason for me is the extra tread-depth you get with the LTs. I like the C-rated LTs for our 4Rs,you'll get an extra 3-4/32nds of tread-depth with the C-rated tire.If I still have my 4R come Winter, I'll look into the Wrangler ATS in C load range,for the price, they impress me.
CJ3Flyr
Super Moderator
Interestingly enough a C rated tire has very similar load capacity to a P of the same size.
Look at the GYSA for example, the P265/70/17 is rated to carry 2535lbs w/ a max inflation of 44PSI. (The tread depth is 14/32") If I understand tire ratings properly it can carry the rated load at 35psi, that's part of being called a 'P' tire vs no letter, XL or LT.
The same size has with the C load rating has capacity of 2470@50psi. What that means is to match OE you'd have to run the C's at about 40-45psi. (OE is 32psi in a P tire rated to carry 2337lbs). Any lower pressure and you have a tire that's under-inflated, just ask on a Ford Explorer forum if that's a good idea.
I would absolutely consider a C tire for the T4R. I'd run it at an appropriate pressure. That's my 2cents...
:cheers:
Look at the GYSA for example, the P265/70/17 is rated to carry 2535lbs w/ a max inflation of 44PSI. (The tread depth is 14/32") If I understand tire ratings properly it can carry the rated load at 35psi, that's part of being called a 'P' tire vs no letter, XL or LT.
The same size has with the C load rating has capacity of 2470@50psi. What that means is to match OE you'd have to run the C's at about 40-45psi. (OE is 32psi in a P tire rated to carry 2337lbs). Any lower pressure and you have a tire that's under-inflated, just ask on a Ford Explorer forum if that's a good idea.
I would absolutely consider a C tire for the T4R. I'd run it at an appropriate pressure. That's my 2cents...
:cheers:
CJ3Flyr
Super Moderator
More on LT vs P tries and the appropriate pressure here: http://www.toyota-4runner.org/showthread.php?threadid=40803
:cheers:
:cheers:
Duhockey
Senior Member
So apparently, I know nothing about tires! what should I do with these??
#
Pro Comp Radial All Terrain Tires - Pro Comp Truck Tires, All Terrain Truck Tires PCT16285
285/75R-16, Pro Comp Radial All Terrain
* Load Range D
* Max Load 3305
* Tread Depth 16.5/32
* Overall Diameter 32.9 Inches
* Raised White Letters
* Sidewall Construction= DualGuard
* 50,000 Mile Tread Wear Warranty
what PSI should I run them at?! when airing down, what should I take them too? now you got me wondering!
CJ3Flyr
Super Moderator
I would air down to whatever you've been doing... Without beadlocks I'm chicken to go under about 18psi. One of the big advantages to LT tires is you can air them down farther due to the stiffer sidewalls, I think many would go down to 12-15psi for beach driving with your tires.
As far as running pressure is concerned: Many just ignore it all and run 35+/- and never have an issue. My :soapbox: issue is high speed blowouts. Underinflation is the main cause of tire overheating/failure. IMHO if you're running a LT on a long highway trip be safe and run 42-50psi. If it beats you to death on your 6 mile daily commute run whatever you like that wears well and air up before you head out on the weekend road trip. Based on the chart and text in the link 42-50psi brings most 265/285 LT tires into a similar load capacity to a P265/xx/xx. Without crunching the numbers out I'd guess 45-47psi is a pretty good roadtrip pressure for your tires.
As far as running pressure is concerned: Many just ignore it all and run 35+/- and never have an issue. My :soapbox: issue is high speed blowouts. Underinflation is the main cause of tire overheating/failure. IMHO if you're running a LT on a long highway trip be safe and run 42-50psi. If it beats you to death on your 6 mile daily commute run whatever you like that wears well and air up before you head out on the weekend road trip. Based on the chart and text in the link 42-50psi brings most 265/285 LT tires into a similar load capacity to a P265/xx/xx. Without crunching the numbers out I'd guess 45-47psi is a pretty good roadtrip pressure for your tires.
JB.
New member
Have we ever found out what the recommended pressure is for the FJs that come with the LT BFGs?
CJ3Flyr
Super Moderator
It looks like they run them at 32psi. I'm not saying Toyota is wrong. Based on what I've learned I would like to know why that's right in the case of the FJC.
http://www.firestonecompleteautocare.com/tires/inflation.jsp
:cheers:
