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Quick Question for you Rubicon guys...


 
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swamp boy
Cherokee Muderator
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Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Mon Oct 10, 2005 7:46 pm    Post subject: Quick Question for you Rubicon guys... Reply with quote

I bought a set of MTR's and the nucklehead that put them on aired them up to like 75PSI.. They rode like rocks... I aired them down to 50PSI they ride much better now but they are louder...(I dont really care...)


OK...Here is the question.. What PSI are you guys running in those puppies so they dont wear funny and they arent hard as rocks?????

Thanks...


OH...Not a great picture but here is my Mall Cruiser with the MTR's... Mr. Green Mr. Green



Carl
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Keithtj
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PostPosted: Mon Oct 10, 2005 8:07 pm    Post subject: Reply with quote

I run mine at around 30-33 psi
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ehirner
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Joined: 01 Jan 2004
Location: Eastern PA

PostPosted: Tue Oct 11, 2005 3:16 pm    Post subject: Reply with quote

Unfortunately, what we run in them and what you need to run in them are two different things. Due to the difference in vehicle weight (I would guess the Mitsu is heavier than a TJ) you'll need to run more pressure than a TJ owner does.
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swamp boy
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Location: New Orleans LA.

PostPosted: Tue Oct 11, 2005 3:33 pm    Post subject: Reply with quote

Feels pretty good at 50PSI I just didnt want to have any crazy wear issues... Since I just bought them and they are for my Mall Cruiser I want them to last forever..

Funny that when I buy tires for my Jeep I only expect them to last a year or two (barely driving..) But when I buy tires for the vehicle that I drive every day I want them to last forever.. rofl rofl
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KnightFire
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Joined: 07 Jan 2004
Location: Hanover, MD

PostPosted: Wed Oct 12, 2005 1:03 am    Post subject: Reply with quote

Good rule of thumb:
(Vehicle Weight in lb/100) + 2 psi at heavier end + 2 psi all around if suspension and alignment are stock.

50psi sounds a bit high to me, sounds like your using the MAX psi rating. You'll know soon enough if it is indeed too high, your tread wear will favor the center section of the tire.

Of course there is no magic number, just use the general rule of thumb above and adjust your settings until you find that middle of the road of nice handling and acceptable tire wear.

I run mine between 32-35psi...dependant on the weather.

KnightFire
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Code3TJ
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PostPosted: Wed Oct 12, 2005 2:45 am    Post subject: Reply with quote

KnightFire wrote:
50psi sounds a bit high to me, sounds like your using the MAX psi rating. You'll know soon enough if it is indeed too high, your tread wear will favor the center section of the tire.

Yeah, I think that sounds a bit high too. Did you bust out your chalk to see how much of the tread is making contact with the mall parking lot? rofl
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WhatWasIThinkin
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Joined: 02 Jan 2004
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PostPosted: Wed Oct 12, 2005 3:18 am    Post subject: Reply with quote

My door sill sticker says 33 pounds.
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Code3TJ
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PostPosted: Wed Oct 12, 2005 8:10 am    Post subject: Reply with quote

BTW, there's an awful lot of sheet metal on that thing. Have you thought about getting out your sawzall and... rofl
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swamp boy
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Location: New Orleans LA.

PostPosted: Wed Oct 12, 2005 3:24 pm    Post subject: Reply with quote

My wife would kill me if I even walked near it with the sawzall..

The side of the tire says 80 PSI max thats what the tire monkey was airing up to.. I will nock it down to 35 or so... Thanks alot fellas..

Carl
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Cirkus
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Joined: 20 Oct 2005

PostPosted: Thu Oct 20, 2005 6:05 pm    Post subject: Reply with quote

Mine came from the dealship with 40psi, but I think it's to make them quieter on test drives. I run 32, onroad and about half that off road.
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99TJ
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Joined: 23 Dec 2005
Location: Denver

PostPosted: Sat Dec 24, 2005 5:22 am    Post subject: Reply with quote

Swamp Boy, there should be a sticker on your door or door post that says exatly what pressure to run in the front, rear, and even the spare.
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TJ Apex
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Joined: 29 Jul 2005
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PostPosted: Sat Jan 07, 2006 8:05 am    Post subject: Reply with quote

The door jam sticker does read 33psi on all 4 tires, but when I baught my BFG's the tire guy set them at 45psi and they were hard, I set mine to 38 -40 psi.
I did try 33psi and they seemed a bit wobbly.
Thatís a good suggestion with the chalk line, or you can use a IR thermometer
and sweep it across the tread, the higher the temp is where your getting the most contact with the road. Ideally you'd want they same temp across the entire tread. Iím not a tire guy so donít quote me.
But thatís what all of the road race guys do to get full contact patch.
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sammy
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Joined: 24 Jan 2006

PostPosted: Tue Jan 24, 2006 7:45 am    Post subject: Reply with quote

i spent a few years to many changin tires...... most of the guys (kids) i worked (guess i was one too at the time) were the brightest bulbls.

Never go by the max tire pressure listed on the tire.

Over inflating will cause exccessive wear down the center of the tire.

always go by the door sticker for best wear and performance outa the tire.

and any on that is changin your tires and putting in that much air,,,, check your lugs too to be sure they are tight, or arent overly tight.
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