Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-21 | 245/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.68 (753.9) | 29.57 (751.2) | -0.11 (-2.7) -0.4% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 93.25 (2368.45) | 92.91 (2359.96) | -0.33 (-8.48) -0.4% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.79 (147) | 1.45 (36.75) 33.3% |
| Revolutions per mile (km) | 679.49 (422.22) | 681.94 (423.73) | 2.44 (1.52) 0.4% |
245/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.93 mph (32.07 km/h) |
| 25 mph (40.23 km/h) | 24.91 mph (40.09 km/h) |
| 30 mph (48.28 km/h) | 29.89 mph (48.11 km/h) |
| 35 mph (56.33 km/h) | 34.87 mph (56.13 km/h) |
| 40 mph (64.37 km/h) | 39.86 mph (64.14 km/h) |
| 45 mph (72.42 km/h) | 44.84 mph (72.16 km/h) |
| 50 mph (80.47 km/h) | 49.82 mph (80.18 km/h) |
| 55 mph (88.51 km/h) | 54.8 mph (88.2 km/h) |
| 60 mph (96.56 km/h) | 59.79 mph (96.22 km/h) |
| 65 mph (104.61 km/h) | 64.77 mph (104.23 km/h) |
| 70 mph (112.65 km/h) | 69.75 mph (112.25 km/h) |
| 75 mph (120.7 km/h) | 74.73 mph (120.27 km/h) |
| 80 mph (128.75 km/h) | 79.71 mph (128.29 km/h) |
| 85 mph (136.79 km/h) | 84.7 mph (136.3 km/h) |
| 90 mph (144.84 km/h) | 89.68 mph (144.32 km/h) |
| 95 mph (152.89 km/h) | 94.66 mph (152.34 km/h) |
| 100 mph (160.93 km/h) | 99.64 mph (160.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1735 | 2016 | 2171 | 2267 | 2370 | 2444 | 2526 | 2622 | 2754 | 2887 | 3035 | 3153 | 3367 | 3604 | 3788 | 3906 | 3973 | 4217 | 4556 | 5295 |
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