Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-15 | 125/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.76 (629) | 22.87 (581) | -1.89 (-48) -7.6% |
| Width inches (mm) | 6.1 (155) | 4.92 (125) | -1.18 (-30) -19.4% |
| Circum. inches (mm) | 77.8 (1976.06) | 71.86 (1825.27) | -5.94 (-150.8) -7.6% |
| Sidewall Height inches (mm) | 4.88 (124) | 3.94 (100) | -0.94 (-24) -19.4% |
| Revolutions per mile (km) | 814.42 (506.06) | 881.7 (547.86) | 67.28 (41.81) 8.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.47 mph (29.73 km/h) |
| 25 mph (40.23 km/h) | 23.09 mph (37.16 km/h) |
| 30 mph (48.28 km/h) | 27.71 mph (44.6 km/h) |
| 35 mph (56.33 km/h) | 32.33 mph (52.03 km/h) |
| 40 mph (64.37 km/h) | 36.95 mph (59.46 km/h) |
| 45 mph (72.42 km/h) | 41.57 mph (66.89 km/h) |
| 50 mph (80.47 km/h) | 46.18 mph (74.33 km/h) |
| 55 mph (88.51 km/h) | 50.8 mph (81.76 km/h) |
| 60 mph (96.56 km/h) | 55.42 mph (89.19 km/h) |
| 65 mph (104.61 km/h) | 60.04 mph (96.62 km/h) |
| 70 mph (112.65 km/h) | 64.66 mph (104.06 km/h) |
| 75 mph (120.7 km/h) | 69.28 mph (111.49 km/h) |
| 80 mph (128.75 km/h) | 73.9 mph (118.92 km/h) |
| 85 mph (136.79 km/h) | 78.51 mph (126.36 km/h) |
| 90 mph (144.84 km/h) | 83.13 mph (133.79 km/h) |
| 95 mph (152.89 km/h) | 87.75 mph (141.22 km/h) |
| 100 mph (160.93 km/h) | 92.37 mph (148.65 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
