Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/70-18 | 255/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.5 (800.2) | 31.05 (788.7) | -0.45 (-11.5) -1.4% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 98.97 (2513.9) | 97.55 (2477.77) | -1.42 (-36.13) -1.4% |
| Sidewall Height inches (mm) | 6.75 (171.5) | 6.53 (165.75) | -0.23 (-5.75) -3.4% |
| Revolutions per mile (km) | 640.18 (397.79) | 649.51 (403.59) | 9.33 (5.8) 1.5% |
255/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.71 mph (31.72 km/h) |
| 25 mph (40.23 km/h) | 24.64 mph (39.66 km/h) |
| 30 mph (48.28 km/h) | 29.57 mph (47.59 km/h) |
| 35 mph (56.33 km/h) | 34.5 mph (55.52 km/h) |
| 40 mph (64.37 km/h) | 39.43 mph (63.45 km/h) |
| 45 mph (72.42 km/h) | 44.35 mph (71.38 km/h) |
| 50 mph (80.47 km/h) | 49.28 mph (79.31 km/h) |
| 55 mph (88.51 km/h) | 54.21 mph (87.24 km/h) |
| 60 mph (96.56 km/h) | 59.14 mph (95.17 km/h) |
| 65 mph (104.61 km/h) | 64.07 mph (103.1 km/h) |
| 70 mph (112.65 km/h) | 68.99 mph (111.04 km/h) |
| 75 mph (120.7 km/h) | 73.92 mph (118.97 km/h) |
| 80 mph (128.75 km/h) | 78.85 mph (126.9 km/h) |
| 85 mph (136.79 km/h) | 83.78 mph (134.83 km/h) |
| 90 mph (144.84 km/h) | 88.71 mph (142.76 km/h) |
| 95 mph (152.89 km/h) | 93.63 mph (150.69 km/h) |
| 100 mph (160.93 km/h) | 98.56 mph (158.62 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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