Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 70/80-17 | 80/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.41 (543.8) | 22.67 (575.8) | 1.26 (32) 5.9% |
| Width inches (mm) | 2.76 (70) | 3.15 (80) | 0.39 (10) 14.3% |
| Circum. inches (mm) | 67.26 (1708.4) | 71.22 (1808.93) | 3.96 (100.53) 5.9% |
| Sidewall Height inches (mm) | 2.2 (56) | 2.83 (72) | 0.63 (16) 28.6% |
| Revolutions per mile (km) | 942.02 (585.34) | 889.67 (552.81) | -52.35 (-32.53) -5.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.18 mph (34.08 km/h) |
| 25 mph (40.23 km/h) | 26.47 mph (42.6 km/h) |
| 30 mph (48.28 km/h) | 31.77 mph (51.12 km/h) |
| 35 mph (56.33 km/h) | 37.06 mph (59.64 km/h) |
| 40 mph (64.37 km/h) | 42.35 mph (68.16 km/h) |
| 45 mph (72.42 km/h) | 47.65 mph (76.68 km/h) |
| 50 mph (80.47 km/h) | 52.94 mph (85.2 km/h) |
| 55 mph (88.51 km/h) | 58.24 mph (93.72 km/h) |
| 60 mph (96.56 km/h) | 63.53 mph (102.24 km/h) |
| 65 mph (104.61 km/h) | 68.82 mph (110.76 km/h) |
| 70 mph (112.65 km/h) | 74.12 mph (119.28 km/h) |
| 75 mph (120.7 km/h) | 79.41 mph (127.8 km/h) |
| 80 mph (128.75 km/h) | 84.71 mph (136.32 km/h) |
| 85 mph (136.79 km/h) | 90 mph (144.84 km/h) |
| 90 mph (144.84 km/h) | 95.3 mph (153.36 km/h) |
| 95 mph (152.89 km/h) | 100.59 mph (161.88 km/h) |
| 100 mph (160.93 km/h) | 105.88 mph (170.4 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
