M
Mike Romain
Guest
How do you figure that?
I run BFG tires and have checked out lots of other makers and 'all' of
them give the height or diameter in their charts.
Reality time here.
So to figure out the circumference all you have to do is multiply the
diameter by PI or 3.14.
What could be more simple?
I 'Really' don't understand why folks want to take the diameter that the
tire makers give you, divide it in half, then use Rx2xPI.
Makes no sense in my mind.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Chevguy wrote:
>
> Then you should know that you figure out circumference using the radius, not
> diameter.
>
> "Mike Romain" <[email protected]> wrote in message
> news:[email protected]...
> > No, I am saying the word 'taller'.
> >
> > .59 difference in radius is ALMOST the same as 1.2" diameter taller.
> >
> > It is 'not' .59" 'taller' at all.
> >
> > No ifs, ands, buts or maybes, the tire is 1.2" taller period!
> >
> > I don't get why you folks are tossing in an unrelated term when trying
> > to figure how much 'taller' a tire is.
> >
> > The manufacturers give the height of the tires to compare on their
> > charts.
> >
> > You need this height difference 'that they give you'! to figure out the
> > circumference difference so you can figure out the speedo difference.
> >
> > THEY DON'T GIVE A RADIUS MEASUREMENT!
> >
> > Man it isn't rocket science, it is grade 6 math.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Joe Poitras wrote:
> > >
> > > You say 6, I say a half dozen. It is 1.2" diameter, or .6" radius
> > > difference.
> > > I had said .59". Sorry I was off.
> > >
> > > "Mike Romain" <[email protected]> wrote in message
> > > news:[email protected]...
> > > > You are mistaken.
> > > >
> > > > On the tires I was referring to, the BFG line, there is a 1.2"
> > > > difference in height between a P215x75 and a P235x75 tire of the same
> > > > make and type.
> > > >
> > > > See:
> > > > http://www.bfgoodrichtires.com/assets/pdf/radial_long_trail_ta.pdf
> > > >
> > > > Mike
> > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > 88 Cherokee 235 BFG AT's
> > > >
> > > > Chevguy wrote:
> > > > >
> > > > > Seeing as you are referring to metric sizes, and those numbers are
> of
> > > course
> > > > > in millimeters.
> > > > > Measured from widest point to widest point, usaully the sidewall
> bulge.
> > > > > Using this example below, the tire will be 15 mm taller, or 1.5 cm,
> or
> > > .59"
> > > > >
> > > > > "JBDragon" <[email protected]> wrote in message
> > > > > news:[email protected]...
> > > > > > I work at a tire shop and can say that for Example, you have a
> > > 235/75R15,
> > > > > > and a 215/75R15, that the 235 will be TALLER!!!
> > > > > > It would in fact be quite a bit taller, by a couple Inches. Your
> > > moving
> > > > > up
> > > > > > 2 sizes, since you skipped a 225/75R15.
> > > > > > If you had a 215/75/R15 before and wanted to keep the SAME Height
> but
> > > get
> > > > > a
> > > > > > little wider, then a 225/70R15 would be the tire to get. Or Wider
> yet
> > > > > with
> > > > > > a 235/65 or 60 R15 Depending on the Brand of tire since they do
> very
> > > from
> > > > > > different Manufactures.
> > > > > >
> > > > > > I have P275/45R20 on my own truck. The Height is quite close to
> the
> > > Stock
> > > > > > Chevy P245/75R16" wheels that were on in. Much Wider tire but not
> a
> > > whole
> > > > > > lot of sidewall. Ignoring the Wheel Diameter or either 16" or
> 20",
> > > you
> > > > > > can see that the first number is going up and the Second Number is
> > > going
> > > > > > down. So while the height is the same, the tire is wider by quite
> a
> > > bit.
> > > > > > If I needed to replace the stock 245 tires, but want to keep the
> > > height
> > > > > but
> > > > > > a little wider, again I'd go with a P255/70R16. The height the
> same,
> > > the
> > > > > > Width a bit wider.
> > > > > >
> > > > > > If someone says there want to go up from a 215 to a 235 and don't
> give
> > > the
> > > > > > second # then I and anyone else will assume that the second number
> is
> > > the
> > > > > > SAME. In which case the tire WILL BE A LOT TALLER! A couple
> inches
> > > is a
> > > > > > lot. Your jumping up 2 tire sizes.
> > > > > >
> > > > > >
> > > > > > "Chris Phillipo" <[email protected]> wrote in message
> > > > > > news:[email protected]...
> > > > > > > In article <[email protected]>,
> > > > > > > [email protected] says...
> > > > > > > >
> > > > > > > > "Mike Romain" <[email protected]> wrote in message
> > > > > > > > news:[email protected]...
> > > > > > > > > I would find someone with a GPS and clock it to see.
> > > > > > > > >
> > > > > > > > > When I went up from the stock 215's to 235's, my speedo was
> > > right
> > > > > on.
> > > > > > it
> > > > > > > > > was off before...
> > > > > > > > >
> > > > > > > > Going up from a 215 to a 235 will not change the speedo. That
> is
> > > the
> > > > > > width
> > > > > > > > of the tire in millimeters. The second number is what
> determines
> > > how
> > > > > > tall
> > > > > > > > the tire is.
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > > 75% percent of 235 is more than 75% of 215.
> > > > > > > --
> > > > > > > ____________________
> > > > > > > Remove "X" from email address to reply.
> > > > > >
> > > > > >
I run BFG tires and have checked out lots of other makers and 'all' of
them give the height or diameter in their charts.
Reality time here.
So to figure out the circumference all you have to do is multiply the
diameter by PI or 3.14.
What could be more simple?
I 'Really' don't understand why folks want to take the diameter that the
tire makers give you, divide it in half, then use Rx2xPI.
Makes no sense in my mind.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Chevguy wrote:
>
> Then you should know that you figure out circumference using the radius, not
> diameter.
>
> "Mike Romain" <[email protected]> wrote in message
> news:[email protected]...
> > No, I am saying the word 'taller'.
> >
> > .59 difference in radius is ALMOST the same as 1.2" diameter taller.
> >
> > It is 'not' .59" 'taller' at all.
> >
> > No ifs, ands, buts or maybes, the tire is 1.2" taller period!
> >
> > I don't get why you folks are tossing in an unrelated term when trying
> > to figure how much 'taller' a tire is.
> >
> > The manufacturers give the height of the tires to compare on their
> > charts.
> >
> > You need this height difference 'that they give you'! to figure out the
> > circumference difference so you can figure out the speedo difference.
> >
> > THEY DON'T GIVE A RADIUS MEASUREMENT!
> >
> > Man it isn't rocket science, it is grade 6 math.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Joe Poitras wrote:
> > >
> > > You say 6, I say a half dozen. It is 1.2" diameter, or .6" radius
> > > difference.
> > > I had said .59". Sorry I was off.
> > >
> > > "Mike Romain" <[email protected]> wrote in message
> > > news:[email protected]...
> > > > You are mistaken.
> > > >
> > > > On the tires I was referring to, the BFG line, there is a 1.2"
> > > > difference in height between a P215x75 and a P235x75 tire of the same
> > > > make and type.
> > > >
> > > > See:
> > > > http://www.bfgoodrichtires.com/assets/pdf/radial_long_trail_ta.pdf
> > > >
> > > > Mike
> > > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > > 88 Cherokee 235 BFG AT's
> > > >
> > > > Chevguy wrote:
> > > > >
> > > > > Seeing as you are referring to metric sizes, and those numbers are
> of
> > > course
> > > > > in millimeters.
> > > > > Measured from widest point to widest point, usaully the sidewall
> bulge.
> > > > > Using this example below, the tire will be 15 mm taller, or 1.5 cm,
> or
> > > .59"
> > > > >
> > > > > "JBDragon" <[email protected]> wrote in message
> > > > > news:[email protected]...
> > > > > > I work at a tire shop and can say that for Example, you have a
> > > 235/75R15,
> > > > > > and a 215/75R15, that the 235 will be TALLER!!!
> > > > > > It would in fact be quite a bit taller, by a couple Inches. Your
> > > moving
> > > > > up
> > > > > > 2 sizes, since you skipped a 225/75R15.
> > > > > > If you had a 215/75/R15 before and wanted to keep the SAME Height
> but
> > > get
> > > > > a
> > > > > > little wider, then a 225/70R15 would be the tire to get. Or Wider
> yet
> > > > > with
> > > > > > a 235/65 or 60 R15 Depending on the Brand of tire since they do
> very
> > > from
> > > > > > different Manufactures.
> > > > > >
> > > > > > I have P275/45R20 on my own truck. The Height is quite close to
> the
> > > Stock
> > > > > > Chevy P245/75R16" wheels that were on in. Much Wider tire but not
> a
> > > whole
> > > > > > lot of sidewall. Ignoring the Wheel Diameter or either 16" or
> 20",
> > > you
> > > > > > can see that the first number is going up and the Second Number is
> > > going
> > > > > > down. So while the height is the same, the tire is wider by quite
> a
> > > bit.
> > > > > > If I needed to replace the stock 245 tires, but want to keep the
> > > height
> > > > > but
> > > > > > a little wider, again I'd go with a P255/70R16. The height the
> same,
> > > the
> > > > > > Width a bit wider.
> > > > > >
> > > > > > If someone says there want to go up from a 215 to a 235 and don't
> give
> > > the
> > > > > > second # then I and anyone else will assume that the second number
> is
> > > the
> > > > > > SAME. In which case the tire WILL BE A LOT TALLER! A couple
> inches
> > > is a
> > > > > > lot. Your jumping up 2 tire sizes.
> > > > > >
> > > > > >
> > > > > > "Chris Phillipo" <[email protected]> wrote in message
> > > > > > news:[email protected]...
> > > > > > > In article <[email protected]>,
> > > > > > > [email protected] says...
> > > > > > > >
> > > > > > > > "Mike Romain" <[email protected]> wrote in message
> > > > > > > > news:[email protected]...
> > > > > > > > > I would find someone with a GPS and clock it to see.
> > > > > > > > >
> > > > > > > > > When I went up from the stock 215's to 235's, my speedo was
> > > right
> > > > > on.
> > > > > > it
> > > > > > > > > was off before...
> > > > > > > > >
> > > > > > > > Going up from a 215 to a 235 will not change the speedo. That
> is
> > > the
> > > > > > width
> > > > > > > > of the tire in millimeters. The second number is what
> determines
> > > how
> > > > > > tall
> > > > > > > > the tire is.
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > > 75% percent of 235 is more than 75% of 215.
> > > > > > > --
> > > > > > > ____________________
> > > > > > > Remove "X" from email address to reply.
> > > > > >
> > > > > >
