Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/45-18 | 235/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.33 (668.7) | 30.03 (762.7) | 3.7 (94) 14.1% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 82.71 (2100.78) | 94.33 (2396.09) | 11.63 (295.31) 14.1% |
| Sidewall Height inches (mm) | 4.16 (105.75) | 6.01 (152.75) | 1.85 (47) 44.4% |
| Revolutions per mile (km) | 766.07 (476.01) | 671.65 (417.35) | -94.42 (-58.67) -12.3% |
235/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.81 mph (36.71 km/h) |
| 25 mph (40.23 km/h) | 28.51 mph (45.89 km/h) |
| 30 mph (48.28 km/h) | 34.22 mph (55.07 km/h) |
| 35 mph (56.33 km/h) | 39.92 mph (64.25 km/h) |
| 40 mph (64.37 km/h) | 45.62 mph (73.42 km/h) |
| 45 mph (72.42 km/h) | 51.33 mph (82.6 km/h) |
| 50 mph (80.47 km/h) | 57.03 mph (91.78 km/h) |
| 55 mph (88.51 km/h) | 62.73 mph (100.96 km/h) |
| 60 mph (96.56 km/h) | 68.43 mph (110.13 km/h) |
| 65 mph (104.61 km/h) | 74.14 mph (119.31 km/h) |
| 70 mph (112.65 km/h) | 79.84 mph (128.49 km/h) |
| 75 mph (120.7 km/h) | 85.54 mph (137.67 km/h) |
| 80 mph (128.75 km/h) | 91.25 mph (146.85 km/h) |
| 85 mph (136.79 km/h) | 96.95 mph (156.02 km/h) |
| 90 mph (144.84 km/h) | 102.65 mph (165.2 km/h) |
| 95 mph (152.89 km/h) | 108.35 mph (174.38 km/h) |
| 100 mph (160.93 km/h) | 114.06 mph (183.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1709 | 1986 | 2138 | 2233 | 2335 | 2407 | 2487 | 2582 | 2713 | 2844 | 2989 | 3106 | 3317 | 3549 | 3731 | 3848 | 3913 | 4153 | 4488 | 5215 |
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