Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-15 | 26/12-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.98 (609) | 26.05 (661.6) | 2.07 (52.6) 8.6% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 75.32 (1913.23) | 81.83 (2078.48) | 6.51 (165.25) 8.6% |
| Sidewall Height inches (mm) | 4.49 (114) | 5.52 (140.3) | 1.04 (26.3) 23.1% |
| Revolutions per mile (km) | 841.17 (522.68) | 774.29 (481.12) | -66.88 (-41.55) -8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.97 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.71 km/h) |
| 30 mph (48.28 km/h) | 32.59 mph (52.45 km/h) |
| 35 mph (56.33 km/h) | 38.02 mph (61.19 km/h) |
| 40 mph (64.37 km/h) | 43.45 mph (69.93 km/h) |
| 45 mph (72.42 km/h) | 48.89 mph (78.68 km/h) |
| 50 mph (80.47 km/h) | 54.32 mph (87.42 km/h) |
| 55 mph (88.51 km/h) | 59.75 mph (96.16 km/h) |
| 60 mph (96.56 km/h) | 65.18 mph (104.9 km/h) |
| 65 mph (104.61 km/h) | 70.61 mph (113.64 km/h) |
| 70 mph (112.65 km/h) | 76.05 mph (122.38 km/h) |
| 75 mph (120.7 km/h) | 81.48 mph (131.13 km/h) |
| 80 mph (128.75 km/h) | 86.91 mph (139.87 km/h) |
| 85 mph (136.79 km/h) | 92.34 mph (148.61 km/h) |
| 90 mph (144.84 km/h) | 97.77 mph (157.35 km/h) |
| 95 mph (152.89 km/h) | 103.21 mph (166.09 km/h) |
| 100 mph (160.93 km/h) | 108.64 mph (174.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1970 | 2289 | 2465 | 2574 | 2692 | 2775 | 2868 | 2977 | 3128 | 3278 | 3446 | 3580 | 3823 | 4092 | 4301 | 4436 | 4511 | 4788 | 5173 | 6012 |
Better Fuel Economy Factory Ratios Increased Power
