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 P-Metric vs LT 
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Post P-Metric vs LT
Yesterday, I ordered 5 285/70R17 Cooper Discoverer AT3s through my local tire shop. I specifically asked for P-Metric tires because the LT equivalent is a Load Range E, which I figured would be too harsh for the lightweight JK. I won't be towing anything and I can't imagine I would come remotely close to exceeding the safe weight of a P-Metric tire. However, I had one heck of a sleepless night last night and I'm wondering if I shouldn't have just gone with the LTs for the added sidewall strength and puncture resistance. I've purchased at least 10 sets of tires through this installer, so I know the owner won't mind if I ask for LTs instead.

The P-Metric go for ~$185
The LT go for ~$215

Thoughts?

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Tue Mar 29, 2016 4:18 pm
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Post Re: P-Metric vs LT
I won't avoid a tire because of a high load rating.

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Tue Mar 29, 2016 6:08 pm
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Post P-Metric vs LT
The only draw back I can think of with a higher load range, other than harsher ride, is that they don't flex as much when you air them down.

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Tue Mar 29, 2016 7:56 pm
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Post Re: P-Metric vs LT
smccollamjr wrote:
The only draw back I can think of with a higher load range, other than harsher ride, is that they don't flex as much when you air them down.



This.

No direct experience, but I've read that folks have trouble with JK's having enough weight to flex the sidewalls in E rated tires.  I don't think you'll regret your decision long term.

I *DO* have experience tearing the sidewall out of a tire on the trail. D-rating, E-rating, ZZ-Top rating wouldn't matter.  

Kevlar, on the other hand, does help (or at least it seems too, I have cuts in my sidewalls that would disable other tires, not a drop leaks).


Tue Mar 29, 2016 8:09 pm
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Joined: Wed Feb 03, 2010 9:48 pm
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Location: Maple Valley
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Post Re: P-Metric vs LT
I would echo the same advice.
I ordered some c-load range tires a couple years ago. E-load tires were accidentally installed. instead of removing them, the tire shop let me have them at the c-range price. I thought "Good Deal"

Hated the ride.
At the beach, even with 10lbs or less pressure, the sidewalls wouldn't flex enough. My Jeep felt helpless in the sand.
However, aside from the two weeks I went surf fishing with those tires, and the rough drive to the Outer Banks, I never cut a sidewall or got a flat in my daily use.


Tue Mar 29, 2016 8:21 pm
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Post Re: P-Metric vs LT
Quote:
they don't flex as much when you air them down.


Air down farther, they will flex.

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Tue Mar 29, 2016 9:00 pm
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Joined: Fri Mar 25, 2016 8:25 pm
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Location: Charleston, WV
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Post Re: P-Metric vs LT
I've been reading horror stories about P-Metric tires off road. I even watched a video where a guy ended up with three slashed sidewalls within 10 minutes and the road he was on was in better shape than the driveway to the house where I grew up, haha. I know my kidneys aren't going to appreciate LTs though...

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Tue Mar 29, 2016 9:22 pm
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Post Re: P-Metric vs LT
You bought a Jeep not a Caddy. As long as you don't piss blood it isn't too bad of a ride

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Tue Mar 29, 2016 9:45 pm
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Post Re: P-Metric vs LT
Thank you for your valuable insight.

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Tue Mar 29, 2016 9:50 pm
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Post Re: P-Metric vs LT
Joleat wrote:
Thank you for your valuable insight.


I'm sure that's sarcasm but you're welcome anyways. :lol:

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Tue Mar 29, 2016 9:58 pm
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Post Re: P-Metric vs LT
But really an AT3 isn't much of an off-road tire so if the P makes you feel better on pavement then roll with it.

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Tue Mar 29, 2016 9:59 pm
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Post Re: P-Metric vs LT
So here's an interesting thought...

According to Jeep's 2013 JK manual, the maximum weight the rear tire carrier is designed to carry is 50 lbs. This increased the following model year, but I question whether or not the construction of the tailgate actually changed.

Stock 18" Sahara wheels weigh in at 27 lbs. and stock P255/70R18 Bridgestone Duelers weigh in at 44 lbs. The combined weight is 71 lbs., which already exceeds what Jeep says is "safe".

This information is not confirmed, but based on some posts within another Jeep forum, the 17x8.5 Level 8 Trackers I ordered weigh ~25 lbs. The LT285/70R17 Cooper AT3s weight 55 lbs. (confirmed by Cooper) and the P285/70R17 Cooper AT3s weight 45 lbs. (also confirmed by Cooper). Therefore, the combined weight of the wheel and tire combos are 80 lbs. and 70 lbs., respectively.

If the factory combo weighs 71 lbs., I'm not too worried about an additional 9 lbs. for the LTs. I'll just white-out that sentence in my manual until I can add the AEV carrier to my bumper. :)

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Wed Mar 30, 2016 9:52 am
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Post Re: P-Metric vs LT
Good info and you'll be fine.

If you have any concern at all purchase and install the MBRP rear tire carrier reinforcement kit.

I ran it on mine while carrying a stock JK 17" and 35" KM2.

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Building a capable off road Jeep is easy...building a street legal one that you can drive two hours away to wheel and then drive to work the following morning is the challenge.


Wed Mar 30, 2016 10:16 am
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Post Re: P-Metric vs LT
I just called my tire guy and it turns out they actually stock the LTs. He said it won't be a problem if I decide to go with them instead of the Ps. He also said they're $210 instead of $215. It's a minimal cost difference, but everything helps I guess.

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Wed Mar 30, 2016 11:34 am
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Post P-Metric vs LT
If you want to go bigger and save some cash I will have a set of them in 315/70/17 available soon. 2 are 30% and 2 are 50%, I also have two off brand for spares in the same size $175 for all 6. They wear good, do well in snow, very quiet, taken them on trails and been impressed but the ride is fairly harsh, I am running 22 psi and that has seemed to be the best compromise of ride vs decent handling and even wear

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Wed Mar 30, 2016 12:23 pm
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