Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/40-18 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.35 (669.2) | 26.68 (677.7) | 0.33 (8.5) 1.3% |
| Width inches (mm) | 10.43 (265) | 9.65 (245) | -0.79 (-20) -7.5% |
| Circum. inches (mm) | 82.77 (2102.35) | 83.82 (2129.06) | 1.05 (26.7) 1.3% |
| Sidewall Height inches (mm) | 4.17 (106) | 4.34 (110.25) | 0.17 (4.25) 4% |
| Revolutions per mile (km) | 765.5 (475.66) | 755.9 (469.69) | -9.6 (-5.97) -1.3% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.25 mph (32.6 km/h) |
| 25 mph (40.23 km/h) | 25.32 mph (40.74 km/h) |
| 30 mph (48.28 km/h) | 30.38 mph (48.89 km/h) |
| 35 mph (56.33 km/h) | 35.44 mph (57.04 km/h) |
| 40 mph (64.37 km/h) | 40.51 mph (65.19 km/h) |
| 45 mph (72.42 km/h) | 45.57 mph (73.34 km/h) |
| 50 mph (80.47 km/h) | 50.64 mph (81.49 km/h) |
| 55 mph (88.51 km/h) | 55.7 mph (89.64 km/h) |
| 60 mph (96.56 km/h) | 60.76 mph (97.79 km/h) |
| 65 mph (104.61 km/h) | 65.83 mph (105.94 km/h) |
| 70 mph (112.65 km/h) | 70.89 mph (114.09 km/h) |
| 75 mph (120.7 km/h) | 75.95 mph (122.23 km/h) |
| 80 mph (128.75 km/h) | 81.02 mph (130.38 km/h) |
| 85 mph (136.79 km/h) | 86.08 mph (138.53 km/h) |
| 90 mph (144.84 km/h) | 91.14 mph (146.68 km/h) |
| 95 mph (152.89 km/h) | 96.21 mph (154.83 km/h) |
| 100 mph (160.93 km/h) | 101.27 mph (162.98 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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