Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/35-18 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.48 (621.7) | 26.68 (677.7) | 2.2 (56) 9% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 76.89 (1953.13) | 83.82 (2129.06) | 6.93 (175.93) 9% |
| Sidewall Height inches (mm) | 3.24 (82.25) | 4.34 (110.25) | 1.1 (28) 34% |
| Revolutions per mile (km) | 823.98 (512) | 755.9 (469.69) | -68.09 (-42.31) -8.3% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.8 mph (35.09 km/h) |
| 25 mph (40.23 km/h) | 27.25 mph (43.86 km/h) |
| 30 mph (48.28 km/h) | 32.7 mph (52.63 km/h) |
| 35 mph (56.33 km/h) | 38.15 mph (61.4 km/h) |
| 40 mph (64.37 km/h) | 43.6 mph (70.17 km/h) |
| 45 mph (72.42 km/h) | 49.05 mph (78.94 km/h) |
| 50 mph (80.47 km/h) | 54.5 mph (87.72 km/h) |
| 55 mph (88.51 km/h) | 59.95 mph (96.49 km/h) |
| 60 mph (96.56 km/h) | 65.4 mph (105.26 km/h) |
| 65 mph (104.61 km/h) | 70.85 mph (114.03 km/h) |
| 70 mph (112.65 km/h) | 76.31 mph (122.8 km/h) |
| 75 mph (120.7 km/h) | 81.76 mph (131.57 km/h) |
| 80 mph (128.75 km/h) | 87.21 mph (140.34 km/h) |
| 85 mph (136.79 km/h) | 92.66 mph (149.12 km/h) |
| 90 mph (144.84 km/h) | 98.11 mph (157.89 km/h) |
| 95 mph (152.89 km/h) | 103.56 mph (166.66 km/h) |
| 100 mph (160.93 km/h) | 109.01 mph (175.43 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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