Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/70-18 | 235/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.95 (786.2) | 31.88 (809.7) | 0.93 (23.5) 3% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 97.24 (2469.92) | 100.15 (2543.75) | 2.91 (73.83) 3% |
| Sidewall Height inches (mm) | 6.48 (164.5) | 6.94 (176.25) | 0.46 (11.75) 7.1% |
| Revolutions per mile (km) | 651.58 (404.87) | 632.67 (393.12) | -18.91 (-11.75) -2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.6 mph (33.15 km/h) |
| 25 mph (40.23 km/h) | 25.75 mph (41.44 km/h) |
| 30 mph (48.28 km/h) | 30.9 mph (49.72 km/h) |
| 35 mph (56.33 km/h) | 36.05 mph (58.01 km/h) |
| 40 mph (64.37 km/h) | 41.2 mph (66.3 km/h) |
| 45 mph (72.42 km/h) | 46.35 mph (74.59 km/h) |
| 50 mph (80.47 km/h) | 51.49 mph (82.87 km/h) |
| 55 mph (88.51 km/h) | 56.64 mph (91.16 km/h) |
| 60 mph (96.56 km/h) | 61.79 mph (99.45 km/h) |
| 65 mph (104.61 km/h) | 66.94 mph (107.73 km/h) |
| 70 mph (112.65 km/h) | 72.09 mph (116.02 km/h) |
| 75 mph (120.7 km/h) | 77.24 mph (124.31 km/h) |
| 80 mph (128.75 km/h) | 82.39 mph (132.6 km/h) |
| 85 mph (136.79 km/h) | 87.54 mph (140.88 km/h) |
| 90 mph (144.84 km/h) | 92.69 mph (149.17 km/h) |
| 95 mph (152.89 km/h) | 97.84 mph (157.46 km/h) |
| 100 mph (160.93 km/h) | 102.99 mph (165.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1610 | 1870 | 2014 | 2103 | 2199 | 2268 | 2343 | 2432 | 2555 | 2679 | 2816 | 2925 | 3124 | 3343 | 3515 | 3624 | 3686 | 3912 | 4227 | 4912 |
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