Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 125/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 23.89 (606.8) | 2.18 (55.3) 10% |
| Width inches (mm) | 6.1 (155) | 4.92 (125) | -1.18 (-30) -19.4% |
| Circum. inches (mm) | 68.21 (1732.59) | 75.05 (1906.32) | 6.84 (173.73) 10% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 3.44 (87.5) | 0.09 (2.25) 2.6% |
| Revolutions per mile (km) | 928.87 (577.17) | 844.22 (524.57) | -84.65 (-52.6) -9.1% |
125/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.01 mph (35.41 km/h) |
| 25 mph (40.23 km/h) | 27.51 mph (44.27 km/h) |
| 30 mph (48.28 km/h) | 33.01 mph (53.12 km/h) |
| 35 mph (56.33 km/h) | 38.51 mph (61.98 km/h) |
| 40 mph (64.37 km/h) | 44.01 mph (70.83 km/h) |
| 45 mph (72.42 km/h) | 49.51 mph (79.68 km/h) |
| 50 mph (80.47 km/h) | 55.01 mph (88.54 km/h) |
| 55 mph (88.51 km/h) | 60.51 mph (97.39 km/h) |
| 60 mph (96.56 km/h) | 66.02 mph (106.24 km/h) |
| 65 mph (104.61 km/h) | 71.52 mph (115.1 km/h) |
| 70 mph (112.65 km/h) | 77.02 mph (123.95 km/h) |
| 75 mph (120.7 km/h) | 82.52 mph (132.8 km/h) |
| 80 mph (128.75 km/h) | 88.02 mph (141.66 km/h) |
| 85 mph (136.79 km/h) | 93.52 mph (150.51 km/h) |
| 90 mph (144.84 km/h) | 99.02 mph (159.36 km/h) |
| 95 mph (152.89 km/h) | 104.53 mph (168.22 km/h) |
| 100 mph (160.93 km/h) | 110.03 mph (177.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2148 | 2496 | 2688 | 2807 | 2935 | 3026 | 3127 | 3245 | 3410 | 3575 | 3757 | 3904 | 4169 | 4461 | 4690 | 4836 | 4918 | 5220 | 5641 | 6555 |
Better Fuel Economy Factory Ratios Increased Power
