Inch to Metric Tire Size:
65
Inch mm Tire Size Inch mm Tire Size
10 254 798 21.5 546 1715
10.5 267 837 22 559 1755
11 279 877 22.5 572 1795
11.5 292 917 23 584 1834
12 305 957 23.5 597 1874
12.5 318 997 24 610 1914
13 330 1037 24.5 622 1954
13.5 343 1077 25 635 1994
14 356 1117 25.5 648 2034
14.5 368 1156 26 660 2074
15 381 1196 26.5 673 2114
15.5 394 1236 27 686 2153
16 406 1276 27.5 699 2193
16.5 419 1316 28 711 2233
17 432 1356 28.5 724 2273
17.5 445 1396 29 737 2313
18 457 1436 29.5 749 2353
18.5 470 1475 30 762 2393
19 483 1515 30.5 775 2433
19.5 495 1555 31 787 2472
20 508 1595 31.5 800 2512
20.5 521 1635 32 813 2552
21 533 1675 32.5 826 2592
The following chart is calculations for tire size in mm entered into
the EX-RAY. The tire size may vary with tire pressure, vehicle
weight changes, etc. Use this chart for a starting reference. For
more accurate speed measurements, utilize the methods de-
scribed “Wheel Size Calculator” section.
Formula: Inch x 25.4 = mm x 3.14 = Actual tire size in mm.
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