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Unread 11-04-2011, 10:49 AM   #1
weerwolv
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Load Range D and E tires on a YJ?

Hi everyone,

What is the major issue of running these tires on a lighter weight YJ?

How would one improve ride?

I'm looking at 265/75R 16 or 285/75R 16 tires as I prefer a more narrow footprint but it appears almost all of these tires live in the Load D and E range.

Thanks in advance,

Note: I'll spend about 70-80 percent of my time on road.

-Chris

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Unread 11-04-2011, 11:14 AM   #2
jeffmarion
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The only thing will be a rougher ride due to the stiffer sidewalls on the tires. But your in a Jeep so you won't notice it too much.
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Unread 11-04-2011, 11:49 AM   #3
Joe Dillard
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Those load range tires are typically designed to run at high pressures (60psi+). High psi = very rough/bouncy ride in a "lightweight" YJ.
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Unread 11-04-2011, 01:01 PM   #4
weerwolv
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Thanks for the feedback gents. If you do run them what pressure would you go with and would that effect anything major on the road?
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Unread 11-04-2011, 05:29 PM   #5
dodger889
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There is a formula for figuring this out. Take the tire rating in pounds (max 2500 at 45psi) . that would give you a 10,000 load cap on the tires. You your yj would be about half of that. Then take the the tire max rating and your jeep weight figure out your percentage of the tire rating. Then take the max psi and use that figure plus 10-15 percent ( this is a safety feature) to give you what should be used for your air pressure.

Disclosure: these are NOT rating on all tires Please use the ratings on you tire to do the figuring on..... And under no reason run under 20 psi on the road at road speeds.
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A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
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im just cheap, and cheap makes you creative.
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Unread 11-04-2011, 06:36 PM   #6
SunDevilJeeper
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Quote:
Originally Posted by dodger889 View Post
Disclosure: these are NOT rating on all tires Please use the ratings on you tire to do the figuring on..... And under no reason run under 20 psi on the road at road speeds.
So... what you mean to say is... go 95mph on the freeway at 11 psi?

EDIT: I was also trying to figure out what psi I should run at, my dunlop mud rovers have a pretty soft sidewall for the rating they have.
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Unread 11-04-2011, 06:44 PM   #7
superj
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I had those heavier tires on something just recently, not my wrangler but something else. They are fine and last forever with the lighter vehicle
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Unread 11-04-2011, 08:14 PM   #8
jeepcrazy93
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Well the TJ rubicons run an E rated tire from the factory and thats what I run on my TJ. I thought it would be much worse than it actually is.
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Unread 11-04-2011, 10:11 PM   #9
dodger889
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Quote:
Originally Posted by SunDevilJeeper View Post
So... what you mean to say is... go 95mph on the freeway at 11 psi?

EDIT: I was also trying to figure out what psi I should run at, my dunlop mud rovers have a pretty soft sidewall for the rating they have.
I hope you are just trying to be funny there!
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A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
Quote:
Originally Posted by bigsquat View Post
im just cheap, and cheap makes you creative.
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Unread 11-04-2011, 10:14 PM   #10
SunDevilJeeper
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Quote:
Originally Posted by dodger889 View Post
I hope you are just trying to be funny there!
I should go post that on pirate.
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1992 YJ - 5.2L V8
2003 WJ Limited - 4.7L H.O. V8

Still not enough power.
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Unread 11-04-2011, 10:38 PM   #11
dodger889
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Hey just cover thy own butt here before someone trys to rip it......
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A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
Quote:
Originally Posted by bigsquat View Post
im just cheap, and cheap makes you creative.
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Unread 11-04-2011, 10:57 PM   #12
SunDevilJeeper
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Oh it's only a matter of time before someone comes along and thinks I'm serious.

I'll bet you a cheeseburger and fries that in a couple years, some noob is gonna bump this thread and say "really? are you serious?"
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Still not enough power.
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Unread 11-04-2011, 11:51 PM   #13
AmmitOsiris
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Really? Are you serious?
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Unread 11-05-2011, 02:36 AM   #14
SunDevilJeeper
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See? I told you so!
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1992 YJ - 5.2L V8
2003 WJ Limited - 4.7L H.O. V8

Still not enough power.
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Unread 11-05-2011, 09:28 AM   #15
RockWoRM
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Quote:
Originally Posted by weerwolv View Post
Thanks for the feedback gents. If you do run them what pressure would you go with and would that effect anything major on the road?
For an example; I run my 35x12.50 MTRs @ 26psi on the road. This is about where I get the best road footprint.
You can do a chalk test, where you rub chaulk on the tread and go for a test ride at a certain psi and see how the tire wears. Repeat and adjust to get best footprint and leave it there.




WRM
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