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 > E rated tire with max psi of 65?

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BurbMan

Islip, Long Island

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Posted: 12/01/20 09:38am Link  |  Quote  |  Print  |  Notify Moderator

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 out with the camper I didn't even look at the tire, I just aired up to 80. Back home 1000 miles later and I see on the sidewall that the max rating for the tire is 65psi.

Sure enough, the Nitto site says may rating is 3860 [email protected] 65 psi. Anybody ever hear of an E rated tire running at 65 psi max?

These are way oversized for the truck (spec calls for minimum 9" rim width, mine are 8"), but after running them on the highway at 80 psi, then on the beach at 20 psi, and at 55 psi unloaded, the truck handles great and wet weather traction/stopping is at least as good as the Revo 3's I had on the Burb.

I was looking for a reason to get rid of these but haven't found one yet....these are about 50% worn, and next set will be the same maybe a size smaller.


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Lwiddis

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Posted: 12/01/20 09:43am Link  |  Quote  |  Print  |  Notify Moderator

That is "different."


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time2roll

Southern California

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Posted: 12/01/20 10:28am Link  |  Quote  |  Print  |  Notify Moderator

Yes those wide tires often have lower 65 rating.


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MFL

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Posted: 12/01/20 10:40am Link  |  Quote  |  Print  |  Notify Moderator

Where are all the tire engineers when you need them? My wag is that these tires are designed as onroad/offroad, so even though e-rated, a lesser max pressure is best for the hybrid use, that the tread and sidewalls are designed for.

JMO, but I'd not use a wider tire, than what the rim is designed for.

Jerry





BurbMan

Islip, Long Island

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Posted: 12/01/20 11:09am Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

JMO, but I'd not use a wider tire, than what the rim is designed for. Jerry


I wouldn't either, but these were on the truck when I bought it. I was concerned that handling would be compromised running close to GVWR with the camper on, but that hasn't been the case.

twodownzero

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Posted: 12/01/20 12:47pm Link  |  Quote  |  Print  |  Notify Moderator

I wouldn't get rid of them. I have the Ridge Grapplers on one of my trucks, not one I use to pull or carry a camper, and they've actually been great tires. I would, however, not air them up so much unloaded. Check your door panel for what the original tires used for pressure and back that down some. 35-40 psi is probably more than enough.

IdaD

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Posted: 12/01/20 02:01pm Link  |  Quote  |  Print  |  Notify Moderator

twodownzero wrote:

I wouldn't get rid of them. I have the Ridge Grapplers on one of my trucks, not one I use to pull or carry a camper, and they've actually been great tires. I would, however, not air them up so much unloaded. Check your door panel for what the original tires used for pressure and back that down some. 35-40 psi is probably more than enough.


The door panel on OP's truck should say 60 front, 80 rear. That's what mine says. I don't generally run at 80 on the rears unless I'm towing or hauling something heavy, though.


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mich800

Pontiac, MI

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Posted: 12/01/20 03:27pm Link  |  Quote  |  Print  |  Notify Moderator

twodownzero wrote:

I wouldn't get rid of them. I have the Ridge Grapplers on one of my trucks, not one I use to pull or carry a camper, and they've actually been great tires. I would, however, not air them up so much unloaded. Check your door panel for what the original tires used for pressure and back that down some. 35-40 psi is probably more than enough.


The inflation sticker is only applicable if running the size/spec tires the sticker is referencing.

time2roll

Southern California

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Posted: 12/01/20 05:35pm Link  |  Quote  |  Print  |  Notify Moderator

Yes get the tire weight chart to determine the correct pressure.

ksss

Eastern Idaho

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Posted: 12/01/20 06:28pm Link  |  Quote  |  Print  |  Notify Moderator

I have never run those Grapplers (have run EXO and G2), but you see a lot of them around. That is one wide tire. Drop a size or two and you will probably save a couple MPG.


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