Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 256/60-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.09 (764.4) | 33.16 (842.2) | 3.06 (77.8) 10.2% |
| Width inches (mm) | 10.08 (256) | 10.83 (275) | 0.75 (19) 7.4% |
| Circum. inches (mm) | 94.54 (2401.43) | 104.17 (2645.85) | 9.62 (244.42) 10.2% |
| Sidewall Height inches (mm) | 6.05 (153.6) | 7.58 (192.5) | 1.53 (38.9) 25.3% |
| Revolutions per mile (km) | 670.16 (416.42) | 608.25 (377.95) | -61.91 (-38.47) -9.2% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.04 mph (35.46 km/h) |
| 25 mph (40.23 km/h) | 27.54 mph (44.33 km/h) |
| 30 mph (48.28 km/h) | 33.05 mph (53.19 km/h) |
| 35 mph (56.33 km/h) | 38.56 mph (62.06 km/h) |
| 40 mph (64.37 km/h) | 44.07 mph (70.93 km/h) |
| 45 mph (72.42 km/h) | 49.58 mph (79.79 km/h) |
| 50 mph (80.47 km/h) | 55.09 mph (88.66 km/h) |
| 55 mph (88.51 km/h) | 60.6 mph (97.52 km/h) |
| 60 mph (96.56 km/h) | 66.11 mph (106.39 km/h) |
| 65 mph (104.61 km/h) | 71.62 mph (115.25 km/h) |
| 70 mph (112.65 km/h) | 77.12 mph (124.12 km/h) |
| 75 mph (120.7 km/h) | 82.63 mph (132.99 km/h) |
| 80 mph (128.75 km/h) | 88.14 mph (141.85 km/h) |
| 85 mph (136.79 km/h) | 93.65 mph (150.72 km/h) |
| 90 mph (144.84 km/h) | 99.16 mph (159.58 km/h) |
| 95 mph (152.89 km/h) | 104.67 mph (168.45 km/h) |
| 100 mph (160.93 km/h) | 110.18 mph (177.31 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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