Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 34/12.5-18 | 285/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.03 (864.24) | 31.46 (799.2) | -2.56 (-65.04) -7.5% |
| Width inches (mm) | 12.52 (318) | 11.22 (285) | -1.3 (-33) -10.4% |
| Circum. inches (mm) | 106.89 (2715.09) | 98.85 (2510.76) | -8.04 (-204.33) -7.5% |
| Sidewall Height inches (mm) | 8.01 (203.52) | 6.73 (171) | -1.28 (-32.52) -16% |
| Revolutions per mile (km) | 592.74 (368.31) | 640.98 (398.28) | 48.24 (29.97) 8.1% |
285/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.49 mph (29.76 km/h) |
| 25 mph (40.23 km/h) | 23.12 mph (37.21 km/h) |
| 30 mph (48.28 km/h) | 27.74 mph (44.65 km/h) |
| 35 mph (56.33 km/h) | 32.37 mph (52.09 km/h) |
| 40 mph (64.37 km/h) | 36.99 mph (59.53 km/h) |
| 45 mph (72.42 km/h) | 41.61 mph (66.97 km/h) |
| 50 mph (80.47 km/h) | 46.24 mph (74.41 km/h) |
| 55 mph (88.51 km/h) | 50.86 mph (81.85 km/h) |
| 60 mph (96.56 km/h) | 55.48 mph (89.29 km/h) |
| 65 mph (104.61 km/h) | 60.11 mph (96.74 km/h) |
| 70 mph (112.65 km/h) | 64.73 mph (104.18 km/h) |
| 75 mph (120.7 km/h) | 69.36 mph (111.62 km/h) |
| 80 mph (128.75 km/h) | 73.98 mph (119.06 km/h) |
| 85 mph (136.79 km/h) | 78.6 mph (126.5 km/h) |
| 90 mph (144.84 km/h) | 83.23 mph (133.94 km/h) |
| 95 mph (152.89 km/h) | 87.85 mph (141.38 km/h) |
| 100 mph (160.93 km/h) | 92.47 mph (148.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1631 | 1895 | 2041 | 2131 | 2228 | 2298 | 2374 | 2464 | 2589 | 2714 | 2853 | 2964 | 3165 | 3387 | 3561 | 3672 | 3734 | 3963 | 4283 | 4977 |
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