Calculate
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In the tire comparison table above, you can see a detailed calculation of the size difference between 265/75 R16 and 305/70 R16 tire. The calculation results are presented in the form of visual infographics, on which tire with size 265/75 R16 is on top, and tire with size 305/70 R16 below. Both in the table and in the graph, the tires are compared according to the following indicators: overall diameter, section width, circumference, sidewall height and clearance. Also, the online application calculates the difference in real speed and speedometer readings if the difference between tire 265/75 R16 and tire 305/70 R16 is significant.
If you want to compare other tire sizes, then select their sizes in the drop-down fields and click on the green button. The online wheel calculator will then display the new results.
| Side comparison | Frontal comparison |
|---|---|
Reference
Knowing your Jeep's tire size can be essential information when it comes time to replace that rubber, or even if you ever decide to change wheels.
And while a stock tire size is imprinted right inside the driver side B pillar, you may not know what if have if you are not the original owner.
So here is some helpful information to assist you in determining what you currently have on the vehicle.
First, the sidewall of your tire contains all the information needed to understand everything about that specific tire. All tires are required to have this information, regardless of the manufacturer brand name.
Now, this information could read in a few different ways. For example, it could simply say 35x12.5 R17, or it may show as P265 75 R15. If it is the first listing, then here is the breakdown. That first number is your tire size at 35", and then the second number tells you the tire width at 12.5". That third reading is the tire type as radial and diameter as 17".
The second listing is a metric set up, and is what is more common on factory-type sized tires. From left to right, the P indicates a passenger tire while 265 indicates the tires width in millimeters.
That 75 is the tire's aspect ratio and simply means the tire's height is equal to 75 percent of its width. Finally, like the first set of numbers, that R15 means it is a radial tire and has a 15" diameter.
For those who have the metric reading on their tires, you can simply plug that into the conversion calculator to determine the tire size, or find that corresponding reading on one of the below conversion charts.
Enter the metric size (i.e. 285/75 R17)
| Metric | Standard |
|---|---|
| 215/75/15 | 27.7"x 8.5" |
| 225/70/15 | 27.4"x 8.9" |
| 225/75/15 | 28.3"x 8.9" |
| 235/75/15 | 29.0"x 9.3" |
| 245/75/15 | 29.5"x 9.6" |
| 255/75/15 | 30.0"x 10.0" |
| 265/75/15 | 30. 6"x 10.4" |
| Metric | Standard |
|---|---|
| 205/85/16 | 29.7"x 8.1" |
| 215/75/16 | 28.7"x 8.5" |
| 225/70/16 | 28.4"x 8.9" |
| 225/75/16 | 29.2"x 8.9" |
| 235/70/16 | 29.0"x 9.3" |
| 235/85/16 | 31.7"x 9.3" |
| 245/70/16 | 29.5"x 9.6" |
| 245/75/16 | 30.5"x 9.6" |
| 255/70/16 | 30.0"x 10.0" |
| 265/70/16 | 30.6"x 10.4" |
| 265/75/16 | 31.6"x 10.4" |
| 275/70/16 | 31.2"x 10.8" |
| 285/75/16 | 32.8"x 11.2" |
| 295/75/16 | 33.4"x 11.6" |
| 305/70/16 | 33.0"x 12.2" |
| 315/75/16 | 34. 8"x 12.4" |
| 375/55/16 | 32.8"x 15.5" |
| 395/70/16 | 37.9"x 16.0" |
| Metric | Standard |
|---|---|
| 245/70/17 | 30.6"x 9.8 |
| 265/70/17 | 31.6"x 10.7 |
| 285/70/17 | 33.0"x 11.5 |
| 315/70/17 | 34.4"x 12.4 |
| Metric | Standard |
|---|---|
| 275/65/18 | 32.1"x 11.0 |
| 375/50/18 | 33.0"x 15.4 |
| 325/60/18 | 33.2"x 13.3 |
| 325/65/18 | 34.8"x 13.5 |
| 305/70/18 | 35.0"x 12.2 |
| 375/60/18 | 35. 7"x 15.5 |
| 395/65/18 | 37.8"x 15.7 |
| Metric | Standard |
|---|---|
| 325/50/20 | 33.0"x 13.2" |
Metric measurement example: 225/70R15
225 = Section width in millimeters
70 = Aspect ratio (ratio of section height to section width)
R15 = Rim diameter
R = Radial Construction, B = Bias Construction, D = Bias Belted Construction
Calculations for Measurements
Tire Width: Section width divided by 25.4 (Ex: 225 / 25.4 = 8.86")
Section Height: Tire width times aspect ratio (Ex: 8.86" x 70% = 6.20")
Overall Diameter: Section height times 2 plus rim diameter (Ex: (6.20" x 2) + 15 = 27.40")
See all tires here
When Is It Time To Change My Jeep's Tires?
Choosing The Best Jeep Tires
How Do You Rotate Jeep Tires?
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Calculate
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In the table above you can see a detailed comparison of the difference in dimensions, parameters and performance between a 305/70 R16 tire and a 285/75 R16 tire. The results of the calculations are also presented in the form of visual models (infographics), on which the tire with a size of 305/70 R16 is on top, and with a size of 285/75 R16, respectively, at the bottom. The visualization was generated in two projections: lateral (left) and frontal (right). The online calculator compares tires according to the following characteristics: diameter, width, circumference, profile height, revolutions per km, ground clearance change. In addition, a potential deviation between the actual speed and the speed displayed on the speedometer is calculated, which can occur if the difference between tires 305/70 R16 and 285/75 R16 is significant.
If you want to compare other tyres, just select the required parameters in the drop-down fields and click on the green button.
| Side Comparison | Frontal comparison |
|---|---|
| R12 | R13 | R14 | R15 | R16 | R17 | R18 | R19 |
|---|---|---|---|---|---|---|---|
| 5 R12 135/80 R12 145/70 R12 145/80 R12 155 R12 155/70 R12 155/80 R12 165/70 R12 | 135/70 R13 135/80 R13 145 R13 |
5 R15 
5 R16 
5 R17 
5 R18
| R20 | R21 | R22 | R23 | R24 |
|---|---|---|---|---|
33/12. 5 R20 35/12.5 R20 37/13.5 R20 40 /13.5 R20 195/55 R20 215/45 R20 225/30 R20 225/35 R20 225/40 R20 225/45 R20 235/30 R20 235/35 R20 235/40 R20 2 235/45 R20 235/50 R20 235/55 R20 235/60 R20 R20 R20 R20 245/30 R20 245/35 R20 245/40 R20 245/45 R20 245/50 R20 245/55 R20 /60 R20 255/30 R20 255 R20 9005 255/40 R20 R20 R20 R20 255/45 R20 255/50 R20 255/55 R20 255/60 R20 265/30 R20 265/35 R20 9005/40 R20 265/45 R20 265/50 R20 265/55 R20 R20 R20 R20 R20 R20 R20 265/60 R20 265/65 R20 275/30 R20 275/35 R20 275/40 R20 275/45 R20 275/50 R20 275/55 R20 275/60 R20 275/65 R20 285/25 R20 285/30 R20 285/35 R20 285/40 R20 285/45 R20 285/50 R20 295/25 R20 295/30 R20 295/35 R20 295/40 R20 295/45 R20 305/25 R20 305/30 R20 305/40 R20 305/50 R20 305/55 R20 315/35 R20 325/25 R20 325/35 R20 335/25 R20 R20 R20 R20 R20 R20 R20 R20 335/30 R20 345/30 R20 | 225/50 R21 235/45 R21 245/30 R21 245/35 R21 /40 R21 245/45 R21 255/30 R2 255/35/35/35/35/35/35/35/35/35/35/35 R21 255/40 R21 255/45 R21 255/50 r21 265/35 R21 265/40 R21 265/45 R21 275/25 R21 275/30 R21 275/35 R21 9005 275 275 275 275 275 275 275 275 275 275 275 275 275 275 275 275 275 27A R21 275/45 R21 275/50 R21 285/30 R21 285/35 R21 285/40 R21 285/45 R21 295/25 R21 295/30 R2 295/35 R21 9005 295/40 R21 305/25 R21 305/30 R21 305/35 R21 315/30 R21 315/35 R21 315/40 R21 315/45 R21 325/25 R2 9005 325/30 RAR 325/40 r21 355/25 r21 | 33/12.  |
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