Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 125/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 22.87 (581) | 1.54 (39) 7.2% |
| Width inches (mm) | 4.53 (115) | 4.92 (125) | 0.39 (10) 8.7% |
| Circum. inches (mm) | 67.04 (1702.74) | 71.86 (1825.27) | 4.82 (122.52) 7.2% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 3.94 (100) | 0.77 (19.5) 24.2% |
| Revolutions per mile (km) | 945.15 (587.29) | 881.7 (547.86) | -63.44 (-39.42) -6.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.44 mph (34.5 km/h) |
| 25 mph (40.23 km/h) | 26.8 mph (43.13 km/h) |
| 30 mph (48.28 km/h) | 32.16 mph (51.75 km/h) |
| 35 mph (56.33 km/h) | 37.52 mph (60.38 km/h) |
| 40 mph (64.37 km/h) | 42.88 mph (69.01 km/h) |
| 45 mph (72.42 km/h) | 48.24 mph (77.63 km/h) |
| 50 mph (80.47 km/h) | 53.6 mph (86.26 km/h) |
| 55 mph (88.51 km/h) | 58.96 mph (94.88 km/h) |
| 60 mph (96.56 km/h) | 64.32 mph (103.51 km/h) |
| 65 mph (104.61 km/h) | 69.68 mph (112.13 km/h) |
| 70 mph (112.65 km/h) | 75.04 mph (120.76 km/h) |
| 75 mph (120.7 km/h) | 80.4 mph (129.39 km/h) |
| 80 mph (128.75 km/h) | 85.76 mph (138.01 km/h) |
| 85 mph (136.79 km/h) | 91.12 mph (146.64 km/h) |
| 90 mph (144.84 km/h) | 96.48 mph (155.26 km/h) |
| 95 mph (152.89 km/h) | 101.84 mph (163.89 km/h) |
| 100 mph (160.93 km/h) | 107.2 mph (172.51 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
