I know the sticker on the inside of the driver door tells me what tire
pressure I should run in my new jeep. However, the sticker states
recommended pressure for the 225 series tires, and my jeep came with the
245's.
Is the recommended pressure different for the different size tires or not?

 

Dan B. did pass the time by typing:
> I know the sticker on the inside of the driver door tells me what tire
> pressure I should run in my new jeep. However, the sticker states
> recommended pressure for the 225 series tires, and my jeep came with the
> 245's.
> Is the recommended pressure different for the different size tires or not?

All depends.

Do this.

Get a big piece of chalk and drive to your local shopping mall or wide
open pavement area. Make it a bit of a drive as you want the tires up
to operating temperature.

Put a real heavy line across the tread.
Drive a few hundred feet in a straight line.
Get out and look at the mark.

If it's evenly worn, your fine.
If it's worn more in the center you need more air.
If it's worn more on the outside you need less air.
If it's worn only on one side you may have an alignment problem. :/

That will give you the best contact patch for your tire.

--
DougW

 

Dan B. did pass the time by typing:
> I know the sticker on the inside of the driver door tells me what tire
> pressure I should run in my new jeep. However, the sticker states
> recommended pressure for the 225 series tires, and my jeep came with the
> 245's.
> Is the recommended pressure different for the different size tires or not?

All depends.

Do this.

Get a big piece of chalk and drive to your local shopping mall or wide
open pavement area. Make it a bit of a drive as you want the tires up
to operating temperature.

Put a real heavy line across the tread.
Drive a few hundred feet in a straight line.
Get out and look at the mark.

If it's evenly worn, your fine.
If it's worn more in the center you need more air.
If it's worn more on the outside you need less air.
If it's worn only on one side you may have an alignment problem. :/

That will give you the best contact patch for your tire.

--
DougW

 

Dan B. did pass the time by typing:
> I know the sticker on the inside of the driver door tells me what tire
> pressure I should run in my new jeep. However, the sticker states
> recommended pressure for the 225 series tires, and my jeep came with the
> 245's.
> Is the recommended pressure different for the different size tires or not?

All depends.

Do this.

Get a big piece of chalk and drive to your local shopping mall or wide
open pavement area. Make it a bit of a drive as you want the tires up
to operating temperature.

Put a real heavy line across the tread.
Drive a few hundred feet in a straight line.
Get out and look at the mark.

If it's evenly worn, your fine.
If it's worn more in the center you need more air.
If it's worn more on the outside you need less air.
If it's worn only on one side you may have an alignment problem. :/

That will give you the best contact patch for your tire.

--
DougW

 

DougW wrote:
>
> Dan B. did pass the time by typing:
> > I know the sticker on the inside of the driver door tells me what tire
> > pressure I should run in my new jeep. However, the sticker states
> > recommended pressure for the 225 series tires, and my jeep came with the
> > 245's.
> > Is the recommended pressure different for the different size tires or not?
>
> All depends.
>
> Do this.
>
> Get a big piece of chalk and drive to your local shopping mall or wide
> open pavement area. Make it a bit of a drive as you want the tires up
> to operating temperature.
>
> Put a real heavy line across the tread.
> Drive a few hundred feet in a straight line.
> Get out and look at the mark.
>
> If it's evenly worn, your fine.
> If it's worn more in the center you need more air.
> If it's worn more on the outside you need less air.
> If it's worn only on one side you may have an alignment problem. :/
>
> That will give you the best contact patch for your tire.
>
> --

Try again Doug....

Worn in the center means too much air....

Worn on the outsides, not enough air....

That said, normally the larger tire takes slightly less air pressure to
get a good contact patch. Not a lot less, only a pound or two.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

 

DougW wrote:
>
> Dan B. did pass the time by typing:
> > I know the sticker on the inside of the driver door tells me what tire
> > pressure I should run in my new jeep. However, the sticker states
> > recommended pressure for the 225 series tires, and my jeep came with the
> > 245's.
> > Is the recommended pressure different for the different size tires or not?
>
> All depends.
>
> Do this.
>
> Get a big piece of chalk and drive to your local shopping mall or wide
> open pavement area. Make it a bit of a drive as you want the tires up
> to operating temperature.
>
> Put a real heavy line across the tread.
> Drive a few hundred feet in a straight line.
> Get out and look at the mark.
>
> If it's evenly worn, your fine.
> If it's worn more in the center you need more air.
> If it's worn more on the outside you need less air.
> If it's worn only on one side you may have an alignment problem. :/
>
> That will give you the best contact patch for your tire.
>
> --

Try again Doug....

Worn in the center means too much air....

Worn on the outsides, not enough air....

That said, normally the larger tire takes slightly less air pressure to
get a good contact patch. Not a lot less, only a pound or two.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

 

DougW wrote:
>
> Dan B. did pass the time by typing:
> > I know the sticker on the inside of the driver door tells me what tire
> > pressure I should run in my new jeep. However, the sticker states
> > recommended pressure for the 225 series tires, and my jeep came with the
> > 245's.
> > Is the recommended pressure different for the different size tires or not?
>
> All depends.
>
> Do this.
>
> Get a big piece of chalk and drive to your local shopping mall or wide
> open pavement area. Make it a bit of a drive as you want the tires up
> to operating temperature.
>
> Put a real heavy line across the tread.
> Drive a few hundred feet in a straight line.
> Get out and look at the mark.
>
> If it's evenly worn, your fine.
> If it's worn more in the center you need more air.
> If it's worn more on the outside you need less air.
> If it's worn only on one side you may have an alignment problem. :/
>
> That will give you the best contact patch for your tire.
>
> --

Try again Doug....

Worn in the center means too much air....

Worn on the outsides, not enough air....

That said, normally the larger tire takes slightly less air pressure to
get a good contact patch. Not a lot less, only a pound or two.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

 

Mike Romain did pass the time by typing:
> DougW wrote:
>>
>> Dan B. did pass the time by typing:
>>> I know the sticker on the inside of the driver door tells me what tire
>>> pressure I should run in my new jeep. However, the sticker states
>>> recommended pressure for the 225 series tires, and my jeep came with the
>>> 245's.
>>> Is the recommended pressure different for the different size tires or not?
>>
>> All depends.
>>
>> Do this.
>>
>> Get a big piece of chalk and drive to your local shopping mall or wide
>> open pavement area. Make it a bit of a drive as you want the tires up
>> to operating temperature.
>>
>> Put a real heavy line across the tread.
>> Drive a few hundred feet in a straight line.
>> Get out and look at the mark.
>>
>> If it's evenly worn, your fine.
>> If it's worn more in the center you need more air.
>> If it's worn more on the outside you need less air.
>> If it's worn only on one side you may have an alignment problem. :/
>>
>> That will give you the best contact patch for your tire.
>>
>> --
>
> Try again Doug....
>
> Worn in the center means too much air....
>
> Worn on the outsides, not enough air....
>
> That said, normally the larger tire takes slightly less air pressure to
> get a good contact patch. Not a lot less, only a pound or two.

GACK! brainfart :/

I typed it correctly then went back and changed it.
dunno why.

 

Mike Romain did pass the time by typing:
> DougW wrote:
>>
>> Dan B. did pass the time by typing:
>>> I know the sticker on the inside of the driver door tells me what tire
>>> pressure I should run in my new jeep. However, the sticker states
>>> recommended pressure for the 225 series tires, and my jeep came with the
>>> 245's.
>>> Is the recommended pressure different for the different size tires or not?
>>
>> All depends.
>>
>> Do this.
>>
>> Get a big piece of chalk and drive to your local shopping mall or wide
>> open pavement area. Make it a bit of a drive as you want the tires up
>> to operating temperature.
>>
>> Put a real heavy line across the tread.
>> Drive a few hundred feet in a straight line.
>> Get out and look at the mark.
>>
>> If it's evenly worn, your fine.
>> If it's worn more in the center you need more air.
>> If it's worn more on the outside you need less air.
>> If it's worn only on one side you may have an alignment problem. :/
>>
>> That will give you the best contact patch for your tire.
>>
>> --
>
> Try again Doug....
>
> Worn in the center means too much air....
>
> Worn on the outsides, not enough air....
>
> That said, normally the larger tire takes slightly less air pressure to
> get a good contact patch. Not a lot less, only a pound or two.

GACK! brainfart :/

I typed it correctly then went back and changed it.
dunno why.

 

Mike Romain did pass the time by typing:
> DougW wrote:
>>
>> Dan B. did pass the time by typing:
>>> I know the sticker on the inside of the driver door tells me what tire
>>> pressure I should run in my new jeep. However, the sticker states
>>> recommended pressure for the 225 series tires, and my jeep came with the
>>> 245's.
>>> Is the recommended pressure different for the different size tires or not?
>>
>> All depends.
>>
>> Do this.
>>
>> Get a big piece of chalk and drive to your local shopping mall or wide
>> open pavement area. Make it a bit of a drive as you want the tires up
>> to operating temperature.
>>
>> Put a real heavy line across the tread.
>> Drive a few hundred feet in a straight line.
>> Get out and look at the mark.
>>
>> If it's evenly worn, your fine.
>> If it's worn more in the center you need more air.
>> If it's worn more on the outside you need less air.
>> If it's worn only on one side you may have an alignment problem. :/
>>
>> That will give you the best contact patch for your tire.
>>
>> --
>
> Try again Doug....
>
> Worn in the center means too much air....
>
> Worn on the outsides, not enough air....
>
> That said, normally the larger tire takes slightly less air pressure to
> get a good contact patch. Not a lot less, only a pound or two.

GACK! brainfart :/

I typed it correctly then went back and changed it.
dunno why.