Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 255/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 31.05 (788.7) | 5.73 (145.5) 22.6% |
| Width inches (mm) | 6.1 (155) | 10.04 (255) | 3.94 (100) 64.5% |
| Circum. inches (mm) | 79.55 (2020.67) | 97.55 (2477.77) | 18 (457.1) 22.6% |
| Sidewall Height inches (mm) | 3.66 (93) | 6.53 (165.75) | 2.86 (72.75) 78.2% |
| Revolutions per mile (km) | 796.44 (494.88) | 649.51 (403.59) | -146.93 (-91.3) -18.4% |
255/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.52 mph (39.47 km/h) |
| 25 mph (40.23 km/h) | 30.66 mph (49.34 km/h) |
| 30 mph (48.28 km/h) | 36.79 mph (59.2 km/h) |
| 35 mph (56.33 km/h) | 42.92 mph (69.07 km/h) |
| 40 mph (64.37 km/h) | 49.05 mph (78.94 km/h) |
| 45 mph (72.42 km/h) | 55.18 mph (88.8 km/h) |
| 50 mph (80.47 km/h) | 61.31 mph (98.67 km/h) |
| 55 mph (88.51 km/h) | 67.44 mph (108.54 km/h) |
| 60 mph (96.56 km/h) | 73.57 mph (118.4 km/h) |
| 65 mph (104.61 km/h) | 79.7 mph (128.27 km/h) |
| 70 mph (112.65 km/h) | 85.83 mph (138.14 km/h) |
| 75 mph (120.7 km/h) | 91.97 mph (148.01 km/h) |
| 80 mph (128.75 km/h) | 98.1 mph (157.87 km/h) |
| 85 mph (136.79 km/h) | 104.23 mph (167.74 km/h) |
| 90 mph (144.84 km/h) | 110.36 mph (177.61 km/h) |
| 95 mph (152.89 km/h) | 116.49 mph (187.47 km/h) |
| 100 mph (160.93 km/h) | 122.62 mph (197.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1920 | 2068 | 2159 | 2258 | 2328 | 2405 | 2497 | 2624 | 2750 | 2891 | 3003 | 3207 | 3432 | 3608 | 3721 | 3784 | 4016 | 4340 | 5043 |
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