Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/90-17 | 120/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 23.61 (599.8) | -1.89 (-48) -7.4% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 80.12 (2035.12) | 74.19 (1884.33) | -5.94 (-150.8) -7.4% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.31 (84) | -0.94 (-24) -22.2% |
| Revolutions per mile (km) | 790.78 (491.37) | 854.07 (530.69) | 63.28 (39.32) 8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.52 mph (29.8 km/h) |
| 25 mph (40.23 km/h) | 23.15 mph (37.25 km/h) |
| 30 mph (48.28 km/h) | 27.78 mph (44.7 km/h) |
| 35 mph (56.33 km/h) | 32.41 mph (52.15 km/h) |
| 40 mph (64.37 km/h) | 37.04 mph (59.6 km/h) |
| 45 mph (72.42 km/h) | 41.67 mph (67.05 km/h) |
| 50 mph (80.47 km/h) | 46.3 mph (74.5 km/h) |
| 55 mph (88.51 km/h) | 50.92 mph (81.96 km/h) |
| 60 mph (96.56 km/h) | 55.55 mph (89.41 km/h) |
| 65 mph (104.61 km/h) | 60.18 mph (96.86 km/h) |
| 70 mph (112.65 km/h) | 64.81 mph (104.31 km/h) |
| 75 mph (120.7 km/h) | 69.44 mph (111.76 km/h) |
| 80 mph (128.75 km/h) | 74.07 mph (119.21 km/h) |
| 85 mph (136.79 km/h) | 78.7 mph (126.66 km/h) |
| 90 mph (144.84 km/h) | 83.33 mph (134.11 km/h) |
| 95 mph (152.89 km/h) | 87.96 mph (141.56 km/h) |
| 100 mph (160.93 km/h) | 92.59 mph (149.01 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2173 | 2525 | 2719 | 2839 | 2969 | 3061 | 3163 | 3283 | 3450 | 3616 | 3801 | 3949 | 4217 | 4513 | 4745 | 4893 | 4976 | 5281 | 5706 | 6631 |
Better Fuel Economy Factory Ratios Increased Power
