Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/80-15 | 185/100-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.87 (581) | 26.57 (674.8) | 3.69 (93.8) 16.1% |
| Width inches (mm) | 4.92 (125) | 7.28 (185) | 2.36 (60) 48% |
| Circum. inches (mm) | 71.86 (1825.27) | 83.46 (2119.95) | 11.6 (294.68) 16.1% |
| Sidewall Height inches (mm) | 3.94 (100) | 7.28 (185) | 3.35 (85) 85% |
| Revolutions per mile (km) | 881.7 (547.86) | 759.14 (471.71) | -122.56 (-76.16) -13.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.23 mph (37.38 km/h) |
| 25 mph (40.23 km/h) | 29.04 mph (46.73 km/h) |
| 30 mph (48.28 km/h) | 34.84 mph (56.08 km/h) |
| 35 mph (56.33 km/h) | 40.65 mph (65.42 km/h) |
| 40 mph (64.37 km/h) | 46.46 mph (74.77 km/h) |
| 45 mph (72.42 km/h) | 52.27 mph (84.11 km/h) |
| 50 mph (80.47 km/h) | 58.07 mph (93.46 km/h) |
| 55 mph (88.51 km/h) | 63.88 mph (102.8 km/h) |
| 60 mph (96.56 km/h) | 69.69 mph (112.15 km/h) |
| 65 mph (104.61 km/h) | 75.49 mph (121.5 km/h) |
| 70 mph (112.65 km/h) | 81.3 mph (130.84 km/h) |
| 75 mph (120.7 km/h) | 87.11 mph (140.19 km/h) |
| 80 mph (128.75 km/h) | 92.92 mph (149.53 km/h) |
| 85 mph (136.79 km/h) | 98.72 mph (158.88 km/h) |
| 90 mph (144.84 km/h) | 104.53 mph (168.23 km/h) |
| 95 mph (152.89 km/h) | 110.34 mph (177.57 km/h) |
| 100 mph (160.93 km/h) | 116.14 mph (186.92 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1932 | 2244 | 2417 | 2524 | 2639 | 2721 | 2811 | 2918 | 3066 | 3214 | 3379 | 3510 | 3749 | 4012 | 4217 | 4349 | 4423 | 4694 | 5072 | 5894 |
Better Fuel Economy Factory Ratios Increased Power
