Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 256/60-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.09 (764.4) | 32.59 (827.7) | 2.49 (63.3) 8.3% |
| Width inches (mm) | 10.08 (256) | 11.22 (285) | 1.14 (29) 11.3% |
| Circum. inches (mm) | 94.54 (2401.43) | 102.37 (2600.3) | 7.83 (198.86) 8.3% |
| Sidewall Height inches (mm) | 6.05 (153.6) | 7.29 (185.25) | 1.25 (31.65) 20.6% |
| Revolutions per mile (km) | 670.16 (416.42) | 618.91 (384.57) | -51.25 (-31.85) -7.6% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.66 mph (34.85 km/h) |
| 25 mph (40.23 km/h) | 27.07 mph (43.57 km/h) |
| 30 mph (48.28 km/h) | 32.48 mph (52.28 km/h) |
| 35 mph (56.33 km/h) | 37.9 mph (60.99 km/h) |
| 40 mph (64.37 km/h) | 43.31 mph (69.7 km/h) |
| 45 mph (72.42 km/h) | 48.73 mph (78.42 km/h) |
| 50 mph (80.47 km/h) | 54.14 mph (87.13 km/h) |
| 55 mph (88.51 km/h) | 59.55 mph (95.84 km/h) |
| 60 mph (96.56 km/h) | 64.97 mph (104.56 km/h) |
| 65 mph (104.61 km/h) | 70.38 mph (113.27 km/h) |
| 70 mph (112.65 km/h) | 75.8 mph (121.98 km/h) |
| 75 mph (120.7 km/h) | 81.21 mph (130.7 km/h) |
| 80 mph (128.75 km/h) | 86.62 mph (139.41 km/h) |
| 85 mph (136.79 km/h) | 92.04 mph (148.12 km/h) |
| 90 mph (144.84 km/h) | 97.45 mph (156.84 km/h) |
| 95 mph (152.89 km/h) | 102.87 mph (165.55 km/h) |
| 100 mph (160.93 km/h) | 108.28 mph (174.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1575 | 1830 | 1970 | 2058 | 2151 | 2218 | 2292 | 2379 | 2500 | 2621 | 2755 | 2862 | 3056 | 3271 | 3438 | 3545 | 3606 | 3827 | 4135 | 4805 |
Better Fuel Economy Factory Ratios Increased Power
