Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-16 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.65 (651.4) | 26.68 (677.7) | 1.04 (26.3) 4% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 80.57 (2046.43) | 83.82 (2129.06) | 3.25 (82.62) 4% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 4.34 (110.25) | -0.48 (-12.25) -10% |
| Revolutions per mile (km) | 786.41 (488.65) | 755.9 (469.69) | -30.52 (-18.96) -3.9% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.81 mph (33.49 km/h) |
| 25 mph (40.23 km/h) | 26.01 mph (41.86 km/h) |
| 30 mph (48.28 km/h) | 31.21 mph (50.23 km/h) |
| 35 mph (56.33 km/h) | 36.41 mph (58.6 km/h) |
| 40 mph (64.37 km/h) | 41.61 mph (66.97 km/h) |
| 45 mph (72.42 km/h) | 46.82 mph (75.34 km/h) |
| 50 mph (80.47 km/h) | 52.02 mph (83.72 km/h) |
| 55 mph (88.51 km/h) | 57.22 mph (92.09 km/h) |
| 60 mph (96.56 km/h) | 62.42 mph (100.46 km/h) |
| 65 mph (104.61 km/h) | 67.62 mph (108.83 km/h) |
| 70 mph (112.65 km/h) | 72.83 mph (117.2 km/h) |
| 75 mph (120.7 km/h) | 78.03 mph (125.57 km/h) |
| 80 mph (128.75 km/h) | 83.23 mph (133.95 km/h) |
| 85 mph (136.79 km/h) | 88.43 mph (142.32 km/h) |
| 90 mph (144.84 km/h) | 93.63 mph (150.69 km/h) |
| 95 mph (152.89 km/h) | 98.84 mph (159.06 km/h) |
| 100 mph (160.93 km/h) | 104.04 mph (167.43 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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