Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-15 | 125/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.61 (549) | 22.87 (581) | 1.26 (32) 5.8% |
| Width inches (mm) | 4.72 (120) | 4.92 (125) | 0.2 (5) 4.2% |
| Circum. inches (mm) | 67.9 (1724.73) | 71.86 (1825.27) | 3.96 (100.53) 5.8% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.94 (100) | 0.63 (16) 19% |
| Revolutions per mile (km) | 933.1 (579.8) | 881.7 (547.86) | -51.39 (-31.93) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.17 mph (34.06 km/h) |
| 25 mph (40.23 km/h) | 26.46 mph (42.58 km/h) |
| 30 mph (48.28 km/h) | 31.75 mph (51.09 km/h) |
| 35 mph (56.33 km/h) | 37.04 mph (59.61 km/h) |
| 40 mph (64.37 km/h) | 42.33 mph (68.13 km/h) |
| 45 mph (72.42 km/h) | 47.62 mph (76.64 km/h) |
| 50 mph (80.47 km/h) | 52.91 mph (85.16 km/h) |
| 55 mph (88.51 km/h) | 58.21 mph (93.67 km/h) |
| 60 mph (96.56 km/h) | 63.5 mph (102.19 km/h) |
| 65 mph (104.61 km/h) | 68.79 mph (110.7 km/h) |
| 70 mph (112.65 km/h) | 74.08 mph (119.22 km/h) |
| 75 mph (120.7 km/h) | 79.37 mph (127.74 km/h) |
| 80 mph (128.75 km/h) | 84.66 mph (136.25 km/h) |
| 85 mph (136.79 km/h) | 89.95 mph (144.77 km/h) |
| 90 mph (144.84 km/h) | 95.25 mph (153.28 km/h) |
| 95 mph (152.89 km/h) | 100.54 mph (161.8 km/h) |
| 100 mph (160.93 km/h) | 105.83 mph (170.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2244 | 2607 | 2807 | 2931 | 3065 | 3160 | 3265 | 3390 | 3561 | 3733 | 3924 | 4077 | 4354 | 4659 | 4898 | 5051 | 5137 | 5452 | 5891 | 6846 |
Better Fuel Economy Factory Ratios Increased Power
