Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/55-16 | 235/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (642.9) | 26.33 (668.7) | 1.02 (25.8) 4% |
| Width inches (mm) | 8.46 (215) | 9.25 (235) | 0.79 (20) 9.3% |
| Circum. inches (mm) | 79.52 (2019.73) | 82.71 (2100.78) | 3.19 (81.05) 4% |
| Sidewall Height inches (mm) | 4.66 (118.25) | 4.16 (105.75) | -0.49 (-12.5) -10.6% |
| Revolutions per mile (km) | 796.81 (495.11) | 766.07 (476.01) | -30.74 (-19.1) -3.9% |
235/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.8 mph (33.48 km/h) |
| 25 mph (40.23 km/h) | 26 mph (41.85 km/h) |
| 30 mph (48.28 km/h) | 31.2 mph (50.22 km/h) |
| 35 mph (56.33 km/h) | 36.4 mph (58.59 km/h) |
| 40 mph (64.37 km/h) | 41.61 mph (66.96 km/h) |
| 45 mph (72.42 km/h) | 46.81 mph (75.33 km/h) |
| 50 mph (80.47 km/h) | 52.01 mph (83.7 km/h) |
| 55 mph (88.51 km/h) | 57.21 mph (92.07 km/h) |
| 60 mph (96.56 km/h) | 62.41 mph (100.44 km/h) |
| 65 mph (104.61 km/h) | 67.61 mph (108.81 km/h) |
| 70 mph (112.65 km/h) | 72.81 mph (117.18 km/h) |
| 75 mph (120.7 km/h) | 78.01 mph (125.54 km/h) |
| 80 mph (128.75 km/h) | 83.21 mph (133.91 km/h) |
| 85 mph (136.79 km/h) | 88.41 mph (142.28 km/h) |
| 90 mph (144.84 km/h) | 93.61 mph (150.65 km/h) |
| 95 mph (152.89 km/h) | 98.81 mph (159.02 km/h) |
| 100 mph (160.93 km/h) | 104.01 mph (167.39 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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