Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/70-18 | 235/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.95 (786.2) | 30.03 (762.7) | -0.93 (-23.5) -3% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 97.24 (2469.92) | 94.33 (2396.09) | -2.91 (-73.83) -3% |
| Sidewall Height inches (mm) | 6.48 (164.5) | 6.01 (152.75) | -0.46 (-11.75) -7.1% |
| Revolutions per mile (km) | 651.58 (404.87) | 671.65 (417.35) | 20.08 (12.47) 3.1% |
235/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.4 mph (31.22 km/h) |
| 25 mph (40.23 km/h) | 24.25 mph (39.03 km/h) |
| 30 mph (48.28 km/h) | 29.1 mph (46.84 km/h) |
| 35 mph (56.33 km/h) | 33.95 mph (54.64 km/h) |
| 40 mph (64.37 km/h) | 38.8 mph (62.45 km/h) |
| 45 mph (72.42 km/h) | 43.65 mph (70.26 km/h) |
| 50 mph (80.47 km/h) | 48.51 mph (78.06 km/h) |
| 55 mph (88.51 km/h) | 53.36 mph (85.87 km/h) |
| 60 mph (96.56 km/h) | 58.21 mph (93.67 km/h) |
| 65 mph (104.61 km/h) | 63.06 mph (101.48 km/h) |
| 70 mph (112.65 km/h) | 67.91 mph (109.29 km/h) |
| 75 mph (120.7 km/h) | 72.76 mph (117.09 km/h) |
| 80 mph (128.75 km/h) | 77.61 mph (124.9 km/h) |
| 85 mph (136.79 km/h) | 82.46 mph (132.71 km/h) |
| 90 mph (144.84 km/h) | 87.31 mph (140.51 km/h) |
| 95 mph (152.89 km/h) | 92.16 mph (148.32 km/h) |
| 100 mph (160.93 km/h) | 97.01 mph (156.12 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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