Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/50-18 | 235/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.25 (692.2) | 30.03 (762.7) | 2.78 (70.5) 10.2% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 85.61 (2174.61) | 94.33 (2396.09) | 8.72 (221.48) 10.2% |
| Sidewall Height inches (mm) | 4.63 (117.5) | 6.01 (152.75) | 1.39 (35.25) 30% |
| Revolutions per mile (km) | 740.06 (459.85) | 671.65 (417.35) | -68.41 (-42.51) -9.2% |
235/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.04 mph (35.47 km/h) |
| 25 mph (40.23 km/h) | 27.55 mph (44.33 km/h) |
| 30 mph (48.28 km/h) | 33.06 mph (53.2 km/h) |
| 35 mph (56.33 km/h) | 38.56 mph (62.06 km/h) |
| 40 mph (64.37 km/h) | 44.07 mph (70.93 km/h) |
| 45 mph (72.42 km/h) | 49.58 mph (79.8 km/h) |
| 50 mph (80.47 km/h) | 55.09 mph (88.66 km/h) |
| 55 mph (88.51 km/h) | 60.6 mph (97.53 km/h) |
| 60 mph (96.56 km/h) | 66.11 mph (106.4 km/h) |
| 65 mph (104.61 km/h) | 71.62 mph (115.26 km/h) |
| 70 mph (112.65 km/h) | 77.13 mph (124.13 km/h) |
| 75 mph (120.7 km/h) | 82.64 mph (132.99 km/h) |
| 80 mph (128.75 km/h) | 88.15 mph (141.86 km/h) |
| 85 mph (136.79 km/h) | 93.66 mph (150.73 km/h) |
| 90 mph (144.84 km/h) | 99.17 mph (159.59 km/h) |
| 95 mph (152.89 km/h) | 104.68 mph (168.46 km/h) |
| 100 mph (160.93 km/h) | 110.18 mph (177.33 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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