Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/50-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.25 (692.2) | 32.07 (814.7) | 4.82 (122.5) 17.7% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 85.61 (2174.61) | 100.77 (2559.46) | 15.15 (384.85) 17.7% |
| Sidewall Height inches (mm) | 4.63 (117.5) | 7.04 (178.75) | 2.41 (61.25) 52.1% |
| Revolutions per mile (km) | 740.06 (459.85) | 628.78 (390.71) | -111.28 (-69.14) -15% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.54 mph (37.88 km/h) |
| 25 mph (40.23 km/h) | 29.42 mph (47.35 km/h) |
| 30 mph (48.28 km/h) | 35.31 mph (56.82 km/h) |
| 35 mph (56.33 km/h) | 41.19 mph (66.3 km/h) |
| 40 mph (64.37 km/h) | 47.08 mph (75.77 km/h) |
| 45 mph (72.42 km/h) | 52.96 mph (85.24 km/h) |
| 50 mph (80.47 km/h) | 58.85 mph (94.71 km/h) |
| 55 mph (88.51 km/h) | 64.73 mph (104.18 km/h) |
| 60 mph (96.56 km/h) | 70.62 mph (113.65 km/h) |
| 65 mph (104.61 km/h) | 76.5 mph (123.12 km/h) |
| 70 mph (112.65 km/h) | 82.39 mph (132.59 km/h) |
| 75 mph (120.7 km/h) | 88.27 mph (142.06 km/h) |
| 80 mph (128.75 km/h) | 94.16 mph (151.53 km/h) |
| 85 mph (136.79 km/h) | 100.04 mph (161 km/h) |
| 90 mph (144.84 km/h) | 105.93 mph (170.47 km/h) |
| 95 mph (152.89 km/h) | 111.81 mph (179.94 km/h) |
| 100 mph (160.93 km/h) | 117.7 mph (189.42 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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