Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-17 | 125/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 25.87 (657.2) | 0.37 (9.4) 1.5% |
| Width inches (mm) | 5.31 (135) | 4.92 (125) | -0.39 (-10) -7.4% |
| Circum. inches (mm) | 80.12 (2035.12) | 81.29 (2064.65) | 1.16 (29.53) 1.5% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.94 (100) | -0.31 (-8) -7.4% |
| Revolutions per mile (km) | 790.78 (491.37) | 779.47 (484.34) | -11.31 (-7.03) -1.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.29 mph (32.65 km/h) |
| 25 mph (40.23 km/h) | 25.36 mph (40.82 km/h) |
| 30 mph (48.28 km/h) | 30.44 mph (48.98 km/h) |
| 35 mph (56.33 km/h) | 35.51 mph (57.14 km/h) |
| 40 mph (64.37 km/h) | 40.58 mph (65.31 km/h) |
| 45 mph (72.42 km/h) | 45.65 mph (73.47 km/h) |
| 50 mph (80.47 km/h) | 50.73 mph (81.63 km/h) |
| 55 mph (88.51 km/h) | 55.8 mph (89.8 km/h) |
| 60 mph (96.56 km/h) | 60.87 mph (97.96 km/h) |
| 65 mph (104.61 km/h) | 65.94 mph (106.13 km/h) |
| 70 mph (112.65 km/h) | 71.02 mph (114.29 km/h) |
| 75 mph (120.7 km/h) | 76.09 mph (122.45 km/h) |
| 80 mph (128.75 km/h) | 81.16 mph (130.62 km/h) |
| 85 mph (136.79 km/h) | 86.23 mph (138.78 km/h) |
| 90 mph (144.84 km/h) | 91.31 mph (146.94 km/h) |
| 95 mph (152.89 km/h) | 96.38 mph (155.11 km/h) |
| 100 mph (160.93 km/h) | 101.45 mph (163.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1984 | 2304 | 2482 | 2591 | 2710 | 2794 | 2887 | 2997 | 3148 | 3300 | 3469 | 3604 | 3849 | 4119 | 4330 | 4465 | 4541 | 4820 | 5208 | 6052 |
Better Fuel Economy Factory Ratios Increased Power
