Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-18 | 235/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.18 (715.7) | 30.03 (762.7) | 1.85 (47) 6.6% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 88.52 (2248.44) | 94.33 (2396.09) | 5.81 (147.65) 6.6% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 6.01 (152.75) | 0.93 (23.5) 18.2% |
| Revolutions per mile (km) | 715.76 (444.75) | 671.65 (417.35) | -44.11 (-27.41) -6.2% |
235/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.31 mph (34.3 km/h) |
| 25 mph (40.23 km/h) | 26.64 mph (42.88 km/h) |
| 30 mph (48.28 km/h) | 31.97 mph (51.45 km/h) |
| 35 mph (56.33 km/h) | 37.3 mph (60.03 km/h) |
| 40 mph (64.37 km/h) | 42.63 mph (68.6 km/h) |
| 45 mph (72.42 km/h) | 47.96 mph (77.18 km/h) |
| 50 mph (80.47 km/h) | 53.28 mph (85.75 km/h) |
| 55 mph (88.51 km/h) | 58.61 mph (94.33 km/h) |
| 60 mph (96.56 km/h) | 63.94 mph (102.9 km/h) |
| 65 mph (104.61 km/h) | 69.27 mph (111.48 km/h) |
| 70 mph (112.65 km/h) | 74.6 mph (120.05 km/h) |
| 75 mph (120.7 km/h) | 79.93 mph (128.63 km/h) |
| 80 mph (128.75 km/h) | 85.25 mph (137.2 km/h) |
| 85 mph (136.79 km/h) | 90.58 mph (145.78 km/h) |
| 90 mph (144.84 km/h) | 95.91 mph (154.35 km/h) |
| 95 mph (152.89 km/h) | 101.24 mph (162.93 km/h) |
| 100 mph (160.93 km/h) | 106.57 mph (171.5 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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