Actual diameters on BFG tires?
 

Why do the actual size {OD} always run smaller than listed? I just
got BFG 30x9.5" A/T KO's for my tj. They're supposed to have an OD of
29.5". I had the stock GSA 30" and ran 'em to till they were done.
Well these BFG's look a bit smaller to me than the GSAs. I'm not sure
how to check this correctly, but I took a tape measure from the
concrete up to the top edge of tire, and it's well under 29" at the
edge. Just about 28.5"! Not really what I was going for. I have them
at 29 PSI.

I went with the 30's over the 31's, because I wanted the narrower 9.5"
width.
Is it normal for them to vary this much? Hell, I thought I was buying
30" tires!

I like the tires A LOT more than the stock ones, but I'm thinking I
want the 31's after this. Only problem is dealer won't return them
even after one day.

Re: Actual diameters on BFG tires?
 

You will get a more accurate measurement running the tape from the front
to the back of the tire.

Or you could jack it up and measure from the top to the bottom.

You measured the compressed part of the tire. Add 20 lb more in air and
your tire will seem to get taller.

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

stephjeff wrote:
>
> Why do the actual size {OD} always run smaller than listed? I just
> got BFG 30x9.5" A/T KO's for my tj. They're supposed to have an OD of
> 29.5". I had the stock GSA 30" and ran 'em to till they were done.
> Well these BFG's look a bit smaller to me than the GSAs. I'm not sure
> how to check this correctly, but I took a tape measure from the
> concrete up to the top edge of tire, and it's well under 29" at the
> edge. Just about 28.5"! Not really what I was going for. I have them
> at 29 PSI.
>
> I went with the 30's over the 31's, because I wanted the narrower 9.5"
> width.
> Is it normal for them to vary this much? Hell, I thought I was buying
> 30" tires!
>
> I like the tires A LOT more than the stock ones, but I'm thinking I
> want the 31's after this. Only problem is dealer won't return them
> even after one day.

Re: Actual diameters on BFG tires?
 

You will get a more accurate measurement running the tape from the front
to the back of the tire.

Or you could jack it up and measure from the top to the bottom.

You measured the compressed part of the tire. Add 20 lb more in air and
your tire will seem to get taller.

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

stephjeff wrote:
>
> Why do the actual size {OD} always run smaller than listed? I just
> got BFG 30x9.5" A/T KO's for my tj. They're supposed to have an OD of
> 29.5". I had the stock GSA 30" and ran 'em to till they were done.
> Well these BFG's look a bit smaller to me than the GSAs. I'm not sure
> how to check this correctly, but I took a tape measure from the
> concrete up to the top edge of tire, and it's well under 29" at the
> edge. Just about 28.5"! Not really what I was going for. I have them
> at 29 PSI.
>
> I went with the 30's over the 31's, because I wanted the narrower 9.5"
> width.
> Is it normal for them to vary this much? Hell, I thought I was buying
> 30" tires!
>
> I like the tires A LOT more than the stock ones, but I'm thinking I
> want the 31's after this. Only problem is dealer won't return them
> even after one day.

Re: Actual diameters on BFG tires?
 

You will get a more accurate measurement running the tape from the front
to the back of the tire.

Or you could jack it up and measure from the top to the bottom.

You measured the compressed part of the tire. Add 20 lb more in air and
your tire will seem to get taller.

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

stephjeff wrote:
>
> Why do the actual size {OD} always run smaller than listed? I just
> got BFG 30x9.5" A/T KO's for my tj. They're supposed to have an OD of
> 29.5". I had the stock GSA 30" and ran 'em to till they were done.
> Well these BFG's look a bit smaller to me than the GSAs. I'm not sure
> how to check this correctly, but I took a tape measure from the
> concrete up to the top edge of tire, and it's well under 29" at the
> edge. Just about 28.5"! Not really what I was going for. I have them
> at 29 PSI.
>
> I went with the 30's over the 31's, because I wanted the narrower 9.5"
> width.
> Is it normal for them to vary this much? Hell, I thought I was buying
> 30" tires!
>
> I like the tires A LOT more than the stock ones, but I'm thinking I
> want the 31's after this. Only problem is dealer won't return them
> even after one day.

Re: Actual diameters on BFG tires?
 

In article <3FE9BD4F.8CEB902C@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote:

> You will get a more accurate measurement running the tape from the front
> to the back of the tire.
>
> Or you could jack it up and measure from the top to the bottom.
>
> You measured the compressed part of the tire. Add 20 lb more in air and
> your tire will seem to get taller.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

The BFG PDF from their site has all the diameters listed.


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Re: Actual diameters on BFG tires?
 

In article <3FE9BD4F.8CEB902C@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote:

> You will get a more accurate measurement running the tape from the front
> to the back of the tire.
>
> Or you could jack it up and measure from the top to the bottom.
>
> You measured the compressed part of the tire. Add 20 lb more in air and
> your tire will seem to get taller.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

The BFG PDF from their site has all the diameters listed.


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Re: Actual diameters on BFG tires?
 

In article <3FE9BD4F.8CEB902C@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote:

> You will get a more accurate measurement running the tape from the front
> to the back of the tire.
>
> Or you could jack it up and measure from the top to the bottom.
>
> You measured the compressed part of the tire. Add 20 lb more in air and
> your tire will seem to get taller.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

The BFG PDF from their site has all the diameters listed.


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