Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-15 | 90/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.61 (549) | 22.67 (575.8) | 1.06 (26.8) 4.9% |
| Width inches (mm) | 4.72 (120) | 3.54 (90) | -1.18 (-30) -25% |
| Circum. inches (mm) | 67.9 (1724.73) | 71.22 (1808.93) | 3.31 (84.19) 4.9% |
| Sidewall Height inches (mm) | 3.31 (84) | 2.83 (72) | -0.47 (-12) -14.3% |
| Revolutions per mile (km) | 933.1 (579.8) | 889.67 (552.81) | -43.43 (-26.99) -4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.98 mph (33.76 km/h) |
| 25 mph (40.23 km/h) | 26.22 mph (42.2 km/h) |
| 30 mph (48.28 km/h) | 31.46 mph (50.64 km/h) |
| 35 mph (56.33 km/h) | 36.71 mph (59.08 km/h) |
| 40 mph (64.37 km/h) | 41.95 mph (67.52 km/h) |
| 45 mph (72.42 km/h) | 47.2 mph (75.96 km/h) |
| 50 mph (80.47 km/h) | 52.44 mph (84.4 km/h) |
| 55 mph (88.51 km/h) | 57.68 mph (92.83 km/h) |
| 60 mph (96.56 km/h) | 62.93 mph (101.27 km/h) |
| 65 mph (104.61 km/h) | 68.17 mph (109.71 km/h) |
| 70 mph (112.65 km/h) | 73.42 mph (118.15 km/h) |
| 75 mph (120.7 km/h) | 78.66 mph (126.59 km/h) |
| 80 mph (128.75 km/h) | 83.91 mph (135.03 km/h) |
| 85 mph (136.79 km/h) | 89.15 mph (143.47 km/h) |
| 90 mph (144.84 km/h) | 94.39 mph (151.91 km/h) |
| 95 mph (152.89 km/h) | 99.64 mph (160.35 km/h) |
| 100 mph (160.93 km/h) | 104.88 mph (168.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2264 | 2630 | 2832 | 2958 | 3093 | 3189 | 3295 | 3420 | 3594 | 3767 | 3960 | 4114 | 4393 | 4701 | 4942 | 5096 | 5183 | 5501 | 5944 | 6908 |
Better Fuel Economy Factory Ratios Increased Power
