| DIAMETER, ROLLOUT (CIRCUMFERENCE) AND REVOLUTIONS PER MILE CHART | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Below is a chart to assist in vehicle drive-train calculations. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Tech Bulletins
DIAMETER, ROLLOUT (CIRCUMFERENCE) AND REVOLUTIONS PER MILE CHART
Below is a chart to assist in vehicle drive-train calculations.
| Diameter | Rollout | Revs/Mile* |
|---|---|---|
| 17.5 | 55.0 | 1222 |
| 18 | 56.5 | 1186 |
| 18.5 | 58.1 | 1152 |
| 19 | 59.7 | 1120 |
| 19.5 | 61.3 | 1090 |
| 20 | 62. 8 | 1061 |
| 22 | 69.1 | 960 |
| 22.5 | 70.7 | 938 |
| 23 | 72.3 | 917 |
| 23.5 | 73.8 | 896 |
| 24 | 75.4 | 877 |
| 24.5 | 77.0 | 858 |
| 25 | 78. 5 | 840 |
| 25.5 | 80.1 | 823 |
| 26 | 81.7 | 807 |
| 26.5 | 83.3 | 791 |
| 27 | 84.8 | 776 |
| 27.5 | 86.4 | 761 |
| 28 | 88.0 | 747 |
28. 5 | 89.5 | 733 |
| 29 | 91.1 | 720 |
| 29.5 | 92.7 | 708 |
| 30 | 94.2 | 695 |
| 30.5 | 95.8 | 684 |
| 31 | 97.4 | 672 |
| 31.5 | 99. 0 | 661 |
| 32 | 100.5 | 651 |
| 32.5 | 102.1 | 640 |
| 33 | 103.7 | 630 |
| 33.5 | 105.2 | 621 |
| 34 | 106.8 | 611 |
| 34.5 | 108.4 | 602 |
| 35 | 110. 0 | 593 |
| 35.5 | 111.5 | 585 |
| 36 | 113.1 | 576 |
| 36.5 | 114.7 | 568 |
| 37 | 116.2 | 560 |
| 37.5 | 117.8 | 553 |
| 38 | 119.4 | 545 |
38. 5 | 121.0 | 538 |
| 39.5 | 124.1 | 524 |
| 40 | 125.7 | 517 |
| 45.5 | 142.9 | 453 |
| 46 | 144.5 | 448 |
| 53 | 166.5 | 388 |
| 53.5 | 168. 1 | 384 |
| 54 | 169.6 | 381 |
*Based on approximate loaded radius.
This is Mickey Thompson General Technical Bulletin #3.
Revised 8/15/17
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: [email protected]
Phone: 330.928.9092
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 285/35 R20 tire and a 285/35 R22 tire. The results of the calculations are also presented in the form of visual models (infographics), on which the tire with a size of 285/35 R20 is on top, and with a size of 285/35 R22, 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, the potential deviation between the actual speed and the speed displayed on the speedometer is calculated, which can occur if the difference between tires 285/35 R20 and 285/35 R22 is significant. US and UK inch version of calculations.
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 |
|---|---|
Calculate
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When factory tires wear out or you just want to put on other wheels, the question arises: what tire sizes will fit my car? The fact is that each car is designed for a certain wheel diameter and tread width.
Usually, this information is contained on the back of the gas tank cap or in the operating documents. If you deviate from these sizes by more than 2-3 percent, then gas mileage will increase, the speedometer will begin to lie, and in case of a large difference, driving can become simply dangerous.
But how to choose the right size tires if there are some incomprehensible numbers written on the profile? Do not measure them with a ruler, by God. It is for these purposes that this tire calculator was created. It allows you to determine the difference between tires in centimeters, inches and percentages. In particular, with the tire calculator you can calculate and compare tire diameter, tread width, profile height and circumference. Additionally, the calculator detects potential differences in speedometer readings, ground clearance changes, and differences in revolutions per kilometer (or mile).
The calculator displays visual differences in diameter, profile, ground clearance and tire width.
On the right side, a dynamic wheel pattern is generated, with a dotted pattern and parameters. At the top is a visual representation of the old tire (original size), and at the bottom is your potential new tire. The picture is displayed in two projections: lateral and frontal. Both can be downloaded to a computer in png format. To do this, right-click on the image and select "Save As...".
The virtual tire calculator is very easy to use. There are drop-down boxes in the upper left corner of the application. In the top row, you need to select the size of your original factory tire (or just the tires that are on your car at the moment). You can simply look at these indicators on the tire profile (side surface). The first field is the tire width in millimeters. The second field is the ratio of the profile height to the tire width in percent. The third field is the disc diameter in inches.
In the second row you need to enter the size of the new tyres, i.
e. those tires that you are going to buy or have already bought. After that, click on the green "Calculate" button. The tire calculator will instantly calculate the differences between tires and display them in a table. Namely: diameter, width, circumference and height of the tire profile, the number of revolutions per kilometer and changes in ground clearance. The first two columns of the table will display the parameters of old and new tires, and the third column will show the nominal and percentage difference between them. Our recommendation will be displayed at the very bottom of the table. If the difference in diameters exceeds 3%, then we strongly do not recommend installing such tires, as this can be dangerous.
At the very bottom, you can see two speedometers that show the difference between the displayed and actual speed when changing tires. You can enter other values in the left speedometer using the arrows or directly from the keyboard. Changes will instantly be displayed on the right.
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