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Old 09-18-2013, 04:09 PM   #1
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Smile So Ive got E rated tires..

Hello Jeeple! I was wondering what are the downsides of my General Grabber AT2s in 265 75 r16 E rated. Im asking this because im planning on replacing my stock steelies with pro comps 7069, and wanna make sure im doing the right thing. Keep in mind my tires are a tiny bit bigger than stock mud terrains!

Thank you !

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Old 09-18-2013, 04:22 PM   #2
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Ther are only a few "downsides" with those tires. First, E range is a 10 ply tire. This will give a stronger sidewall. Having a stronger sidewall is better to resist tearing on rocks, however, being stiffer, it will produce a harsher ride and not flatten out as much when you air down. Another thing is it is heavier which can hurt mpg/power.

Next: it's an all terrain. Benefit: quieter ride, better mpg than mud tires, more even/longer wear, better in snow and ice
Downside: not great in mud, some say it doesn't look as "cool"

There are pluses and minuses to every decision. What you have is a very capable tire. Unless you're going larger right away, it wouldn't make sense to replace the tires. The new rims will give it a whole new look

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Old 09-18-2013, 04:35 PM   #3
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My BFG Rugged Terrains are rated SL, which is a generic rating for passenger car tires. Given how harsh these made the wrangler ride, I bet E rated light truck tires must make for a pretty firm ride, I bet.

But its all subjective in the end.
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Old 09-18-2013, 06:15 PM   #4
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Mine are E rated and they are more stable If anything. Not all E tires are the same though. For example the ply (amount) and rubber compound used. Iirc my Hankooks use a softer rubber than some of the others. I can run the PSI down some too with the stiffer sidewall.
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Old 09-18-2013, 06:31 PM   #5
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Everyone is different. Some guys I swear are like the Princess and the Pea, I mean they add 3 PSI to their tires and they whine like you stuck them in a battle tank. Other guys run around on E rated tires with 60 PSI for no good reason other than getting an extra .1 mpg while wearing out the center of their tires.

I think if you're not overly sensitive you will be fine, and you probably won't get as many flats as you might with a C rated. Enjoy.
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Old 09-18-2013, 08:10 PM   #6
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FYI, D rated vs E rated tires are not measured in plys anymore. They used to be referred to as plys in the bias radial days. Even though they say D or E rated there are not 8 or 10 physical layers or plys. It's a rating system.
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Old 09-18-2013, 09:34 PM   #7
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I have Toyo MT in a 285/75/17 E rated, which I bought in March after two weekends in a row puncturing a sidewall on my OEM tires..
I would air down to 15psi with the OEM tires, now I air down to about 12psi...
I personally don't see them as a rough ride at all, they are noisier but not bad.
I have taken two long trips into Colorado and into Utah and I like the highway ride... either at 37psi or 32.... doesn't seem to be a big difference...
I will probably always run a E rated tire for its sidewall strength..
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Old 09-18-2013, 09:43 PM   #8
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They are going to ride noticeably harsher than a C-load rated tire. While great in many respects for a rocky trail, when on the street the ride will be subpar. I have a set of 34" (287/75/17) load range E KM's in the garage that sit there 50 weeks out of the year I'm not on rocky trails.

You can try airing them down, but you'll hit a speed bump and you notice the bump steer much more.

I have lots of sets of tires, I will not buy another set of E's for my daily driver/occasional JKUR. (as my set will never wear out).

Much better suited for a 7000# 3/4 ton diesel pickup.
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Old 09-18-2013, 10:55 PM   #9
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I don't mean to hijack the thread but quick question. Can I air down my SL rated 285/70/17 BFG Rugged Terrains? SL is just a passenger tire rating, its not even at the level of C,D,E, I don't believe...

By air down I mean 20psi.
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Old 09-19-2013, 05:51 AM   #10
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I don't mean to hijack the thread but quick question. Can I air down my SL rated 285/70/17 BFG Rugged Terrains? SL is just a passenger tire rating, its not even at the level of C,D,E, I don't believe...

By air down I mean 20psi.
If you have the Light Truck version of that tire, I believe it is an E tire.
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Old 09-19-2013, 06:30 AM   #11
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I had to "crush" the side walls of my Toyo's before they really gripped the rocks well. As you notice with the E's is that when you air down, doesn't look like you are. I took the Toyo's down to 5 PSI on the street and slowly cruised up and down the street a few times to "crush" the sidewall. Now the sidewall flexes a lot better while in the rocks. Could all be in my head but works for me.
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Old 09-19-2013, 08:08 AM   #12
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Again.... There's other factors like how the tire is constructed and materials used. Just because it's a Load E doesn't mean it's going to ride like a flinstone mobile
Run the psi done a few more psi. Honestly not as bad as the interwebs say.

Fwiw my jk is a very light 2 door. Tires are 35x16 load E Hankook MT's
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Old 09-19-2013, 09:31 AM   #13
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D and E tires ride very harsh on a light vehicle like the JK, they also lower you gas mileage, those tires are made 3/4 and 1 ton trucks.
Though the size choices are limited you are much better off with a P rated tire, you can get 285/70/17s in a P.
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Old 09-19-2013, 09:56 AM   #14
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Thanks for all the feedback ! I feel better about my tires now. Truth is though, I really like them and while going wheeling about 3 weeks ago, I aired them down to 20 and the ride felt good ( Not sure if I can air them down more )... Thanks again for all the answers and maaaaannn do I love this forum

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Old 09-19-2013, 10:09 AM   #15
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D and E tires ride very harsh on a light vehicle like the JK, they also lower you gas mileage, those tires are made 3/4 and 1 ton trucks.
Though the size choices are limited you are much better off with a P rated tire, you can get 285/70/17s in a P.

I have E rated 35x12.50x17 Cooper MTs....

They are a bit stiff and I run them at 27 psi in town
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Old 09-19-2013, 10:13 AM   #16
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A vehicle is held up by it's tires, more specifically the volume and pressure of air held within. So a big tire at high pressure will support an immense load. For a tire to hold a higher PSI, it's got to have a tough carcass - or it will fail.

Here's a tire chart:

http://www.tirerack.com/tires/tires....FR+with+Kevlar

Click the Specs tab:

Notice all the Load Range E tires are rated for max pressure around 80psi. Also, a single tire can support the weight of an entire JK. That should tell you that a set will support a full size pickup loaded with gravel.

Because an E load range carcass has to be strong, it's sidewalls are stiffer and the tread heavier and won't flex or give going over bumps.

I've owned several full size diesel trucks. Tires that run well on those won't perform well on a JK/JKU platform.

Running a low pressure in an E rated tire will shorten it's life.
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Old 09-19-2013, 10:18 AM   #17
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Running a low pressure in an E rated tire will shorten it's life.
This is NOT true. Whats a low pressure?

The chalk test will tell you how low you can go for paved street driving.
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Old 09-19-2013, 10:24 AM   #18
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Here you go:
http://www.tirerack.com/tires/tirete...e.jsp?techid=1

believe it or not, tires are manufactured for an intended use. Putting 30 psi in an 80 psi tire will cause the sidewall to flex, squirm, build up heat and fail. (80 is max, most perform well at 65-70)
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Old 09-19-2013, 10:31 AM   #19
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Here you go:
http://www.tirerack.com/tires/tirete...e.jsp?techid=1

believe it or not, tires are manufactured for an intended use. Putting 30 psi in an 80 psi tire will cause the sidewall to flex, squirm, build up heat and fail. (80 is max, most perform well at 65-70)
I have to tell you, sometimes regardless what you read on the internet, real life expirence far outways it sometimes.

My E rated tires at 27 psi do not squat on a JK. Maybe my Dually. You cant use so called "specs" and blindly apply them to every situation.

With the weight of the JK I would bet you that at 27 psi on the JK and the same tire on a 1 ton truck at 60 PSI the tire wear will be pretty similar on a "E" rated tire.

I doubt that if you had my tires you would wan to run them even at 35 psi. Have you ever ran a 35" tire?
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Old 09-19-2013, 11:11 AM   #20
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Huh. Load INDEX is the number that needs more contemplation than number of plys (121 or less for a Wrangler.
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Old 09-19-2013, 11:18 AM   #21
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I have to tell you, sometimes regardless what you read on the internet, real life expirence far outways it sometimes. My E rated tires at 27 psi do not squat on a JK. Maybe my Dually. You cant use so called "specs" and blindly apply them to every situation. With the weight of the JK I would bet you that at 27 psi on the JK and the same tire on a 1 ton truck at 60 PSI the tire wear will be pretty similar on a "E" rated tire. I doubt that if you had my tires you would wan to run them even at 35 psi. Have you ever ran a 35" tire?
Couldn't agree more. What load range came on the lighter Tj rubi stock? ... Yep E
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Old 09-19-2013, 11:26 AM   #22
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Couldn't agree more. What load range came on the lighter Tj rubi stock? ... Yep E
Yes, and everybody complained so bad that Jeep ditched them in 07 and went with LT "C" forevermore.

LT "E" has no place on a vehicle that weighs 3,800 lbs.
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Old 09-19-2013, 12:17 PM   #23
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Yes, and everybody complained so bad that Jeep ditched them in 07 and went with LT "C" forevermore.

LT "E" has no place on a vehicle that weighs 3,800 lbs.
hmm. the rubicon 10A has e-rated tires...
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Old 09-19-2013, 12:43 PM   #24
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I have to tell you, sometimes regardless what you read on the internet, real life expirence far outways it sometimes.

My E rated tires at 27 psi do not squat on a JK. Maybe my Dually. You cant use so called "specs" and blindly apply them to every situation.

With the weight of the JK I would bet you that at 27 psi on the JK and the same tire on a 1 ton truck at 60 PSI the tire wear will be pretty similar on a "E" rated tire.

I doubt that if you had my tires you would wan to run them even at 35 psi. Have you ever ran a 35" tire?

No, not a '35" but ran a 34" on a JKU, but I also ran several sets of 37, 38, 40", 42"s on my Humvees. Mounted a dozen sets of runflat/dual beadlocks, installed a Cummins 5.9 conversion, currently have 5 JKUs AND had a 3 other Jeeps, Dodge CTD's, blah ,blah - over the years I've run almost every tire on and off road - and probably 15 million views on youtube. I'm pretty sure I have more tire experience than you.
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Old 09-19-2013, 12:58 PM   #25
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No, not a '35" but ran a 34" on a JKU, but I also ran several sets of 37, 38, 40", 42"s on my Humvees. Mounted a dozen sets of runflat/dual beadlocks, installed a Cummins 5.9 conversion, currently have 5 JKUs AND had a 3 other Jeeps, Dodge CTD's, blah ,blah - over the years I've run almost every tire on and off road - and probably 15 million views on youtube. I'm pretty sure I have more tire experience than you.
Yeah but did you know my neighbor has 8 rabbits!?
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Old 09-19-2013, 12:59 PM   #26
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Yeah but did you know my neighbor has 8 rabbits!?
I'd like to be his mechanic. <not really>. Damn, that's a record.
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Old 09-19-2013, 01:03 PM   #27
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I'd like to be his mechanic. <not really>. Damn, that's a record.
I meant the small cuddly variety...Not the car... ;-)
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Old 09-19-2013, 01:07 PM   #28
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Yeah but did you know my neighbor has 8 rabbits!?
Oh yeah? My neighbor has 9 rabbits.
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Old 09-19-2013, 01:17 PM   #29
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Oh yeah? My neighbor has 9 rabbits.
Those 9 are probably 12 as of this posting.
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Old 09-19-2013, 01:17 PM   #30
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hmm. the rubicon 10A has e-rated tires...
Does it ?

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