Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/35-18 | 235/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.48 (621.7) | 26.33 (668.7) | 1.85 (47) 7.6% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 76.89 (1953.13) | 82.71 (2100.78) | 5.81 (147.65) 7.6% |
| Sidewall Height inches (mm) | 3.24 (82.25) | 4.16 (105.75) | 0.93 (23.5) 28.6% |
| Revolutions per mile (km) | 823.98 (512) | 766.07 (476.01) | -57.91 (-35.99) -7% |
235/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.51 mph (34.62 km/h) |
| 25 mph (40.23 km/h) | 26.89 mph (43.28 km/h) |
| 30 mph (48.28 km/h) | 32.27 mph (51.93 km/h) |
| 35 mph (56.33 km/h) | 37.65 mph (60.59 km/h) |
| 40 mph (64.37 km/h) | 43.02 mph (69.24 km/h) |
| 45 mph (72.42 km/h) | 48.4 mph (77.9 km/h) |
| 50 mph (80.47 km/h) | 53.78 mph (86.55 km/h) |
| 55 mph (88.51 km/h) | 59.16 mph (95.21 km/h) |
| 60 mph (96.56 km/h) | 64.54 mph (103.86 km/h) |
| 65 mph (104.61 km/h) | 69.91 mph (112.52 km/h) |
| 70 mph (112.65 km/h) | 75.29 mph (121.17 km/h) |
| 75 mph (120.7 km/h) | 80.67 mph (129.83 km/h) |
| 80 mph (128.75 km/h) | 86.05 mph (138.48 km/h) |
| 85 mph (136.79 km/h) | 91.43 mph (147.14 km/h) |
| 90 mph (144.84 km/h) | 96.8 mph (155.79 km/h) |
| 95 mph (152.89 km/h) | 102.18 mph (164.45 km/h) |
| 100 mph (160.93 km/h) | 107.56 mph (173.1 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1949 | 2265 | 2439 | 2547 | 2663 | 2746 | 2837 | 2945 | 3094 | 3244 | 3410 | 3542 | 3783 | 4048 | 4256 | 4388 | 4463 | 4737 | 5118 | 5948 |
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