Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 28/9-15 | 32/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.98 (710.76) | 31.89 (809.98) | 3.91 (99.22) 14% |
| Width inches (mm) | 9.02 (229) | 9.49 (241) | 0.47 (12) 5.2% |
| Circum. inches (mm) | 87.91 (2232.92) | 100.18 (2544.63) | 12.27 (311.71) 14% |
| Sidewall Height inches (mm) | 6.49 (164.88) | 8.44 (214.49) | 1.95 (49.61) 30.1% |
| Revolutions per mile (km) | 720.74 (447.84) | 632.45 (392.98) | -88.29 (-54.86) -12.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.79 mph (36.68 km/h) |
| 25 mph (40.23 km/h) | 28.49 mph (45.85 km/h) |
| 30 mph (48.28 km/h) | 34.19 mph (55.02 km/h) |
| 35 mph (56.33 km/h) | 39.89 mph (64.19 km/h) |
| 40 mph (64.37 km/h) | 45.58 mph (73.36 km/h) |
| 45 mph (72.42 km/h) | 51.28 mph (82.53 km/h) |
| 50 mph (80.47 km/h) | 56.98 mph (91.7 km/h) |
| 55 mph (88.51 km/h) | 62.68 mph (100.87 km/h) |
| 60 mph (96.56 km/h) | 68.38 mph (110.04 km/h) |
| 65 mph (104.61 km/h) | 74.07 mph (119.21 km/h) |
| 70 mph (112.65 km/h) | 79.77 mph (128.38 km/h) |
| 75 mph (120.7 km/h) | 85.47 mph (137.55 km/h) |
| 80 mph (128.75 km/h) | 91.17 mph (146.72 km/h) |
| 85 mph (136.79 km/h) | 96.87 mph (155.89 km/h) |
| 90 mph (144.84 km/h) | 102.56 mph (165.06 km/h) |
| 95 mph (152.89 km/h) | 108.26 mph (174.23 km/h) |
| 100 mph (160.93 km/h) | 113.96 mph (183.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1609 | 1870 | 2014 | 2103 | 2198 | 2267 | 2342 | 2431 | 2555 | 2678 | 2815 | 2924 | 3123 | 3342 | 3513 | 3623 | 3685 | 3911 | 4226 | 4911 |
Better Fuel Economy Factory Ratios Increased Power
