Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 280/85-16 | 37/12.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.74 (882.4) | 37.03 (940.64) | 2.29 (58.24) 6.6% |
| Width inches (mm) | 11.02 (280) | 12.52 (318) | 1.5 (38) 13.6% |
| Circum. inches (mm) | 109.14 (2772.14) | 116.34 (2955.11) | 7.2 (182.97) 6.6% |
| Sidewall Height inches (mm) | 9.37 (238) | 10.52 (267.12) | 1.15 (29.12) 12.2% |
| Revolutions per mile (km) | 580.54 (360.73) | 544.6 (338.4) | -35.94 (-22.33) -6.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.32 mph (34.31 km/h) |
| 25 mph (40.23 km/h) | 26.65 mph (42.89 km/h) |
| 30 mph (48.28 km/h) | 31.98 mph (51.47 km/h) |
| 35 mph (56.33 km/h) | 37.31 mph (60.04 km/h) |
| 40 mph (64.37 km/h) | 42.64 mph (68.62 km/h) |
| 45 mph (72.42 km/h) | 47.97 mph (77.2 km/h) |
| 50 mph (80.47 km/h) | 53.3 mph (85.78 km/h) |
| 55 mph (88.51 km/h) | 58.63 mph (94.36 km/h) |
| 60 mph (96.56 km/h) | 63.96 mph (102.93 km/h) |
| 65 mph (104.61 km/h) | 69.29 mph (111.51 km/h) |
| 70 mph (112.65 km/h) | 74.62 mph (120.09 km/h) |
| 75 mph (120.7 km/h) | 79.95 mph (128.67 km/h) |
| 80 mph (128.75 km/h) | 85.28 mph (137.25 km/h) |
| 85 mph (136.79 km/h) | 90.61 mph (145.82 km/h) |
| 90 mph (144.84 km/h) | 95.94 mph (154.4 km/h) |
| 95 mph (152.89 km/h) | 101.27 mph (162.98 km/h) |
| 100 mph (160.93 km/h) | 106.6 mph (171.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1386 | 1610 | 1734 | 1811 | 1893 | 1952 | 2017 | 2094 | 2200 | 2306 | 2424 | 2518 | 2689 | 2878 | 3025 | 3120 | 3173 | 3367 | 3639 | 4228 |
Better Fuel Economy Factory Ratios Increased Power
