Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-18 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.65 (702.2) | 26.68 (677.7) | -0.96 (-24.5) -3.5% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 86.85 (2206.03) | 83.82 (2129.06) | -3.03 (-76.97) -3.5% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 4.34 (110.25) | -0.48 (-12.25) -10% |
| Revolutions per mile (km) | 729.52 (453.3) | 755.9 (469.69) | 26.37 (16.39) 3.6% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.3 mph (31.06 km/h) |
| 25 mph (40.23 km/h) | 24.13 mph (38.83 km/h) |
| 30 mph (48.28 km/h) | 28.95 mph (46.6 km/h) |
| 35 mph (56.33 km/h) | 33.78 mph (54.36 km/h) |
| 40 mph (64.37 km/h) | 38.6 mph (62.13 km/h) |
| 45 mph (72.42 km/h) | 43.43 mph (69.89 km/h) |
| 50 mph (80.47 km/h) | 48.26 mph (77.66 km/h) |
| 55 mph (88.51 km/h) | 53.08 mph (85.43 km/h) |
| 60 mph (96.56 km/h) | 57.91 mph (93.19 km/h) |
| 65 mph (104.61 km/h) | 62.73 mph (100.96 km/h) |
| 70 mph (112.65 km/h) | 67.56 mph (108.72 km/h) |
| 75 mph (120.7 km/h) | 72.38 mph (116.49 km/h) |
| 80 mph (128.75 km/h) | 77.21 mph (124.26 km/h) |
| 85 mph (136.79 km/h) | 82.03 mph (132.02 km/h) |
| 90 mph (144.84 km/h) | 86.86 mph (139.79 km/h) |
| 95 mph (152.89 km/h) | 91.69 mph (147.55 km/h) |
| 100 mph (160.93 km/h) | 96.51 mph (155.32 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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