tire presure
03-07-2011, 02:54 AM
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Year: 97
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tire presure
what air presure should i run in a 34 950 super swamper the guy i got them from said he ran them with 20 lbs but i was just wondering what yall thot the max is 45 lbs
03-07-2011, 03:30 AM
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I'd run 35 on the road and air down for real offroading... 35 to 40 should be fine for every day driving... if he ran 20 then look at the tire wear... more in the middle? More on the outsides? This will tell you where they need to be...
03-07-2011, 03:40 AM
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he only used them for 2 trail runs they have a lot of tread left i was just wondering what air presure i shold run im hoping i can get 20000 miles out of them
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03-07-2011, 06:26 AM
#8
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don't go by what the sidewall says, that tire isn't stock for a light vehicle like your jeep. all that means is it's the max the tire can hold.
i run all my 33's on jeeps at about 24, so for a 34 swamper, i'd say the previous owner is about right at 20. the sidewall is very thick on those and require less air to hold up your light jeep.
you can do the chalk trick, where you rub some chalk across the treads of the tire, and drive it around the block and examine the scrub pattern.
if the chalk is scrubbed off in the center, too much air.
if it's scrubbed off the edges, too little air.
you want an even scrub pattern.
it takes a bit to get it right, so i'll save you some time and start at 20.
i run all my 33's on jeeps at about 24, so for a 34 swamper, i'd say the previous owner is about right at 20. the sidewall is very thick on those and require less air to hold up your light jeep.
you can do the chalk trick, where you rub some chalk across the treads of the tire, and drive it around the block and examine the scrub pattern.
if the chalk is scrubbed off in the center, too much air.
if it's scrubbed off the edges, too little air.
you want an even scrub pattern.
it takes a bit to get it right, so i'll save you some time and start at 20.
03-07-2011, 12:09 PM
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don't go by what the sidewall says, that tire isn't stock for a light vehicle like your jeep. all that means is it's the max the tire can hold.
i run all my 33's on jeeps at about 24, so for a 34 swamper, i'd say the previous owner is about right at 20. the sidewall is very thick on those and require less air to hold up your light jeep.
you can do the chalk trick, where you rub some chalk across the treads of the tire, and drive it around the block and examine the scrub pattern.
if the chalk is scrubbed off in the center, too much air.
if it's scrubbed off the edges, too little air.
you want an even scrub pattern.
it takes a bit to get it right, so i'll save you some time and start at 20.
i run all my 33's on jeeps at about 24, so for a 34 swamper, i'd say the previous owner is about right at 20. the sidewall is very thick on those and require less air to hold up your light jeep.
you can do the chalk trick, where you rub some chalk across the treads of the tire, and drive it around the block and examine the scrub pattern.
if the chalk is scrubbed off in the center, too much air.
if it's scrubbed off the edges, too little air.
you want an even scrub pattern.
it takes a bit to get it right, so i'll save you some time and start at 20.
This make a lot of sense.Sorry about my recommendation as I was going by my own experience which is only with stock tire sizes.I probably should have not posted but was not thinking that the non stock tires would be different.I know better now
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03-07-2011, 03:15 PM
#12
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Not your zize,but i've been riding on 235 Durtracs for 3,000 miles now. While driving like Miss Daisey I get 20mpg.
Out side temp will vary the air pressure too. I have seen this first hand this week.lol.
My XJ is my d/d. When it was about 25* outside My tires were at 37cold and got up to 40psi when hot. My gas milage suffered. To much air.
Now its been alittle warmer out and i run at 34lbs cold. When the tires come up to temp, they're at 37...= 20mpg.
So just by paying attention to your mpg, no matter what your driving style is.... Will be able to tell you what tires are doing as well.
I am going to do the chalk line on the tires tomorrow night too.
Just my input.
Jay.
Out side temp will vary the air pressure too. I have seen this first hand this week.lol.
My XJ is my d/d. When it was about 25* outside My tires were at 37cold and got up to 40psi when hot. My gas milage suffered. To much air.
Now its been alittle warmer out and i run at 34lbs cold. When the tires come up to temp, they're at 37...= 20mpg.
So just by paying attention to your mpg, no matter what your driving style is.... Will be able to tell you what tires are doing as well.
I am going to do the chalk line on the tires tomorrow night too.
Just my input.
Jay.
Last edited by OEJ; 03-07-2011 at 03:20 PM.
03-08-2011, 12:24 AM
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It also depends on how much weight you carry in your jeep. The best way i found to get the tire pressure right is to use a line of chalk across the tire. Roll the jeep forward over the chalk on your tire tread and if you see even wear along the chalk line you have the correct pressure.
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