Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-18 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.97 (659.7) | 26.68 (677.7) | 0.71 (18) 2.7% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 81.59 (2072.51) | 83.82 (2129.06) | 2.23 (56.55) 2.7% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 4.34 (110.25) | 0.35 (9) 8.9% |
| Revolutions per mile (km) | 776.52 (482.51) | 755.9 (469.69) | -20.62 (-12.82) -2.7% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.55 mph (33.07 km/h) |
| 25 mph (40.23 km/h) | 25.68 mph (41.33 km/h) |
| 30 mph (48.28 km/h) | 30.82 mph (49.6 km/h) |
| 35 mph (56.33 km/h) | 35.95 mph (57.86 km/h) |
| 40 mph (64.37 km/h) | 41.09 mph (66.13 km/h) |
| 45 mph (72.42 km/h) | 46.23 mph (74.4 km/h) |
| 50 mph (80.47 km/h) | 51.36 mph (82.66 km/h) |
| 55 mph (88.51 km/h) | 56.5 mph (90.93 km/h) |
| 60 mph (96.56 km/h) | 61.64 mph (99.2 km/h) |
| 65 mph (104.61 km/h) | 66.77 mph (107.46 km/h) |
| 70 mph (112.65 km/h) | 71.91 mph (115.73 km/h) |
| 75 mph (120.7 km/h) | 77.05 mph (123.99 km/h) |
| 80 mph (128.75 km/h) | 82.18 mph (132.26 km/h) |
| 85 mph (136.79 km/h) | 87.32 mph (140.53 km/h) |
| 90 mph (144.84 km/h) | 92.46 mph (148.79 km/h) |
| 95 mph (152.89 km/h) | 97.59 mph (157.06 km/h) |
| 100 mph (160.93 km/h) | 102.73 mph (165.33 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1924 | 2235 | 2407 | 2513 | 2628 | 2709 | 2799 | 2906 | 3053 | 3201 | 3364 | 3495 | 3733 | 3995 | 4199 | 4330 | 4404 | 4674 | 5050 | 5869 |
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