Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/70-16 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.88 (784.4) | 32.07 (814.7) | 1.19 (30.3) 3.9% |
| Width inches (mm) | 10.63 (270) | 10.83 (275) | 0.2 (5) 1.9% |
| Circum. inches (mm) | 97.02 (2464.27) | 100.77 (2559.46) | 3.75 (95.19) 3.9% |
| Sidewall Height inches (mm) | 7.44 (189) | 7.04 (178.75) | -0.4 (-10.25) -5.4% |
| Revolutions per mile (km) | 653.07 (405.8) | 628.78 (390.71) | -24.29 (-15.09) -3.7% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.77 mph (33.43 km/h) |
| 25 mph (40.23 km/h) | 25.97 mph (41.79 km/h) |
| 30 mph (48.28 km/h) | 31.16 mph (50.15 km/h) |
| 35 mph (56.33 km/h) | 36.35 mph (58.5 km/h) |
| 40 mph (64.37 km/h) | 41.55 mph (66.86 km/h) |
| 45 mph (72.42 km/h) | 46.74 mph (75.22 km/h) |
| 50 mph (80.47 km/h) | 51.93 mph (83.58 km/h) |
| 55 mph (88.51 km/h) | 57.12 mph (91.93 km/h) |
| 60 mph (96.56 km/h) | 62.32 mph (100.29 km/h) |
| 65 mph (104.61 km/h) | 67.51 mph (108.65 km/h) |
| 70 mph (112.65 km/h) | 72.7 mph (117.01 km/h) |
| 75 mph (120.7 km/h) | 77.9 mph (125.36 km/h) |
| 80 mph (128.75 km/h) | 83.09 mph (133.72 km/h) |
| 85 mph (136.79 km/h) | 88.28 mph (142.08 km/h) |
| 90 mph (144.84 km/h) | 93.48 mph (150.44 km/h) |
| 95 mph (152.89 km/h) | 98.67 mph (158.79 km/h) |
| 100 mph (160.93 km/h) | 103.86 mph (167.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1600 | 1859 | 2002 | 2090 | 2186 | 2254 | 2329 | 2417 | 2540 | 2662 | 2799 | 2907 | 3105 | 3323 | 3493 | 3602 | 3663 | 3888 | 4201 | 4882 |
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