Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-18 | 35/12.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.34 (770.7) | 35.03 (889.68) | 4.68 (118.98) 15.4% |
| Width inches (mm) | 11.22 (285) | 12.52 (318) | 1.3 (33) 11.6% |
| Circum. inches (mm) | 95.32 (2421.23) | 110.04 (2795.01) | 14.72 (373.79) 15.4% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 8.51 (216.24) | 2.34 (59.49) 38% |
| Revolutions per mile (km) | 664.68 (413.01) | 575.79 (357.78) | -88.89 (-55.23) -13.4% |
35/12.5-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.09 mph (37.16 km/h) |
| 25 mph (40.23 km/h) | 28.86 mph (46.44 km/h) |
| 30 mph (48.28 km/h) | 34.63 mph (55.73 km/h) |
| 35 mph (56.33 km/h) | 40.4 mph (65.02 km/h) |
| 40 mph (64.37 km/h) | 46.18 mph (74.31 km/h) |
| 45 mph (72.42 km/h) | 51.95 mph (83.6 km/h) |
| 50 mph (80.47 km/h) | 57.72 mph (92.89 km/h) |
| 55 mph (88.51 km/h) | 63.49 mph (102.18 km/h) |
| 60 mph (96.56 km/h) | 69.26 mph (111.47 km/h) |
| 65 mph (104.61 km/h) | 75.03 mph (120.76 km/h) |
| 70 mph (112.65 km/h) | 80.81 mph (130.05 km/h) |
| 75 mph (120.7 km/h) | 86.58 mph (139.33 km/h) |
| 80 mph (128.75 km/h) | 92.35 mph (148.62 km/h) |
| 85 mph (136.79 km/h) | 98.12 mph (157.91 km/h) |
| 90 mph (144.84 km/h) | 103.89 mph (167.2 km/h) |
| 95 mph (152.89 km/h) | 109.67 mph (176.49 km/h) |
| 100 mph (160.93 km/h) | 115.44 mph (185.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1833 | 1914 | 2002 | 2064 | 2132 | 2214 | 2326 | 2438 | 2563 | 2662 | 2843 | 3043 | 3199 | 3298 | 3355 | 3560 | 3847 | 4471 |
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