Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-15 | 285/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.98 (609) | 28.46 (723) | 4.49 (114) 18.7% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 75.32 (1913.23) | 89.42 (2271.37) | 14.1 (358.14) 18.7% |
| Sidewall Height inches (mm) | 4.49 (114) | 6.73 (171) | 2.24 (57) 50% |
| Revolutions per mile (km) | 841.17 (522.68) | 708.53 (440.26) | -132.63 (-82.41) -15.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.74 mph (38.21 km/h) |
| 25 mph (40.23 km/h) | 29.68 mph (47.77 km/h) |
| 30 mph (48.28 km/h) | 35.62 mph (57.32 km/h) |
| 35 mph (56.33 km/h) | 41.55 mph (66.87 km/h) |
| 40 mph (64.37 km/h) | 47.49 mph (76.42 km/h) |
| 45 mph (72.42 km/h) | 53.42 mph (85.98 km/h) |
| 50 mph (80.47 km/h) | 59.36 mph (95.53 km/h) |
| 55 mph (88.51 km/h) | 65.3 mph (105.08 km/h) |
| 60 mph (96.56 km/h) | 71.23 mph (114.64 km/h) |
| 65 mph (104.61 km/h) | 77.17 mph (124.19 km/h) |
| 70 mph (112.65 km/h) | 83.1 mph (133.74 km/h) |
| 75 mph (120.7 km/h) | 89.04 mph (143.3 km/h) |
| 80 mph (128.75 km/h) | 94.98 mph (152.85 km/h) |
| 85 mph (136.79 km/h) | 100.91 mph (162.4 km/h) |
| 90 mph (144.84 km/h) | 106.85 mph (171.95 km/h) |
| 95 mph (152.89 km/h) | 112.78 mph (181.51 km/h) |
| 100 mph (160.93 km/h) | 118.72 mph (191.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1803 | 2095 | 2256 | 2356 | 2463 | 2540 | 2624 | 2724 | 2862 | 3000 | 3153 | 3276 | 3499 | 3744 | 3936 | 4059 | 4128 | 4381 | 4734 | 5501 |
Better Fuel Economy Factory Ratios Increased Power
