Andrew Tollison 3
Well-Known Member
This might sound like a dumb guestion but whats the difference in a 255/70/16 tire and a 245/75/16 tire? And would it fit the stock wheel on a 04 4x4?
Tire size question
- Thread starter Andrew Tollison 3
- Start date
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Kevin Palmer
Well-Known Member
Here is some cut and paste info for you; (THE BOTTOM LINE IS MORE TARGETED TO YOUR QUESTION).
TIRE TECH PAGE
First number (195 or 205) is the overall width of the tire, not the tread width.
Second number (65 or 60) is the aspect ratio. The sidewall is 60% (or 65% or...) as tall as the tire is wide.
Third number is wheel size.
As a tire gets a lower aspect ratio, the tread gets wider, so a 195/60 will have a wider tread than a 195/70.
Figure out tire diameter as follows:
width * (aspect ratio * 2) / 2540 + wheel size
A 205/60/14 is only about 1% shorter than a 195/65/14 but will have a wider tread width.
TIRE TECH PAGE
First number (195 or 205) is the overall width of the tire, not the tread width.
Second number (65 or 60) is the aspect ratio. The sidewall is 60% (or 65% or...) as tall as the tire is wide.
Third number is wheel size.
As a tire gets a lower aspect ratio, the tread gets wider, so a 195/60 will have a wider tread than a 195/70.
Figure out tire diameter as follows:
width * (aspect ratio * 2) / 2540 + wheel size
A 205/60/14 is only about 1% shorter than a 195/65/14 but will have a wider tread width.
Martin Luckett
Member
Andrew: The 255 tire is 10 mm wider than the other & the side wall on the 255 stands 178.5 mm tall vs. 183.75 mm tall. Hope that helps.....
troy malone
Active Member
the 255-70-16 has a diameter of approx 30.1 inches and is approx 7.6 inches wide
the 245-75-16 has a diameter of approx 30.5 inches and a witdh of approx 7.3 inches
so the 245-75-16will be slightly taller and slightly skinner than the 255-70-16...
tire sizer ar slightly different by manufacturer..
it will definately fit on stock wheels...
here is the formula from tire racks web site
Width x Aspect Ratio = Section Height
Section Height x 2 = Combined Section Height
Combined Section Height + Wheel Diameter = Tire Diameter
Example: 185/60R14 85H or 185/60HR14
185mm x .60=111mm
111mm x 2=222mm
222mm + 355.6mm(14")= 577.6mm or 22.74"
The first number is the width of the tire in millimeters, measured from sidewall to sidewall. To convert to inches, divide by 25.4 In the example above, the width is 185mm or 7.28".
The second number is the aspect ratio. This is a ratio of sidewall height to width. In the example above, the tire is 7.28" wide, multiply that by the aspect ratio to find the height of one sidewall. In this case, 185x0.60=111mm or 7.28"x0.60=4.36".
The last number is the diameter of the wheel in inches.
To figure the outside diameter of a tire, take the sidewall height and multiply by 2,(remember that the diameter is made up of 2 sidewalls, the one above the wheel, and the one below the wheel) and add the diameter of the wheel to get your answer.
troy
the 245-75-16 has a diameter of approx 30.5 inches and a witdh of approx 7.3 inches
so the 245-75-16will be slightly taller and slightly skinner than the 255-70-16...
tire sizer ar slightly different by manufacturer..
it will definately fit on stock wheels...
here is the formula from tire racks web site
Width x Aspect Ratio = Section Height
Section Height x 2 = Combined Section Height
Combined Section Height + Wheel Diameter = Tire Diameter
Example: 185/60R14 85H or 185/60HR14
185mm x .60=111mm
111mm x 2=222mm
222mm + 355.6mm(14")= 577.6mm or 22.74"
The first number is the width of the tire in millimeters, measured from sidewall to sidewall. To convert to inches, divide by 25.4 In the example above, the width is 185mm or 7.28".
The second number is the aspect ratio. This is a ratio of sidewall height to width. In the example above, the tire is 7.28" wide, multiply that by the aspect ratio to find the height of one sidewall. In this case, 185x0.60=111mm or 7.28"x0.60=4.36".
The last number is the diameter of the wheel in inches.
To figure the outside diameter of a tire, take the sidewall height and multiply by 2,(remember that the diameter is made up of 2 sidewalls, the one above the wheel, and the one below the wheel) and add the diameter of the wheel to get your answer.
troy
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Andrew Tollison 3
Well-Known Member
so would I be better off if I was to get the 255/70/16?
Martin Luckett
Member
Andrew: I have a 04 ST also & i put 265/60s on mine, but they are 18 inch wheels. No problem with the fit.... You can check out how they look in the ST of the week section. Just click on my name ( Martin Luckett )....
TomT
Well-Known Member
Get the 255's. They look better and you won't have any problems at all with rubbing.
Chet 02
Well-Known Member
So...could I put 305/60/16 on my stock wheels? I have 255/70/16 now so it would be slightly taller and wider right? [Broken External Image]:
Chet
Chet
Dallas Starr
Well-Known Member
It would be substatially wider (50 mm) and slighty taller (4.5 mm i believe)
Martin Luckett
Member
Hey Chet: The 305 tires should work without any spacers............ 183 mm tall on the side wall.
Chet 02
Well-Known Member
I guess what I'm really wondering is if my stock wheels will be ok with a wider tire on it. I don't even know what the wheel width is.
Chet
Chet
troy malone
Active Member
i do not beleive you'll get a 305 (approx 11-12 inch wide tire on a 7.5 inch rim.. rim will need to be 10-11 inches wide... i highly doubt you'll find a 305x60x16 anyway.. maybe in a 20 or 22...
troy
troy
