Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.18 (715.7) | 33.16 (842.2) | 4.98 (126.5) 17.7% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 88.52 (2248.44) | 104.17 (2645.85) | 15.65 (397.41) 17.7% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 7.58 (192.5) | 2.49 (63.25) 48.9% |
| Revolutions per mile (km) | 715.76 (444.75) | 608.25 (377.95) | -107.51 (-66.8) -15% |
275/70-18 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 (47.34 km/h) |
| 30 mph (48.28 km/h) | 35.3 mph (56.81 km/h) |
| 35 mph (56.33 km/h) | 41.19 mph (66.28 km/h) |
| 40 mph (64.37 km/h) | 47.07 mph (75.75 km/h) |
| 45 mph (72.42 km/h) | 52.95 mph (85.22 km/h) |
| 50 mph (80.47 km/h) | 58.84 mph (94.69 km/h) |
| 55 mph (88.51 km/h) | 64.72 mph (104.16 km/h) |
| 60 mph (96.56 km/h) | 70.61 mph (113.63 km/h) |
| 65 mph (104.61 km/h) | 76.49 mph (123.1 km/h) |
| 70 mph (112.65 km/h) | 82.37 mph (132.57 km/h) |
| 75 mph (120.7 km/h) | 88.26 mph (142.03 km/h) |
| 80 mph (128.75 km/h) | 94.14 mph (151.5 km/h) |
| 85 mph (136.79 km/h) | 100.02 mph (160.97 km/h) |
| 90 mph (144.84 km/h) | 105.91 mph (170.44 km/h) |
| 95 mph (152.89 km/h) | 111.79 mph (179.91 km/h) |
| 100 mph (160.93 km/h) | 117.68 mph (189.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
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