Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 50/80-17 | 90/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.15 (511.8) | 22.67 (575.8) | 2.52 (64) 12.5% |
| Width inches (mm) | 1.97 (50) | 3.54 (90) | 1.57 (40) 80% |
| Circum. inches (mm) | 63.3 (1607.87) | 71.22 (1808.93) | 7.92 (201.06) 12.5% |
| Sidewall Height inches (mm) | 1.57 (40) | 2.83 (72) | 1.26 (32) 80% |
| Revolutions per mile (km) | 1000.92 (621.94) | 889.67 (552.81) | -111.25 (-69.13) -11.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.5 mph (36.21 km/h) |
| 25 mph (40.23 km/h) | 28.13 mph (45.26 km/h) |
| 30 mph (48.28 km/h) | 33.75 mph (54.32 km/h) |
| 35 mph (56.33 km/h) | 39.38 mph (63.37 km/h) |
| 40 mph (64.37 km/h) | 45 mph (72.42 km/h) |
| 45 mph (72.42 km/h) | 50.63 mph (81.48 km/h) |
| 50 mph (80.47 km/h) | 56.25 mph (90.53 km/h) |
| 55 mph (88.51 km/h) | 61.88 mph (99.58 km/h) |
| 60 mph (96.56 km/h) | 67.5 mph (108.64 km/h) |
| 65 mph (104.61 km/h) | 73.13 mph (117.69 km/h) |
| 70 mph (112.65 km/h) | 78.75 mph (126.74 km/h) |
| 75 mph (120.7 km/h) | 84.38 mph (135.79 km/h) |
| 80 mph (128.75 km/h) | 90 mph (144.85 km/h) |
| 85 mph (136.79 km/h) | 95.63 mph (153.9 km/h) |
| 90 mph (144.84 km/h) | 101.25 mph (162.95 km/h) |
| 95 mph (152.89 km/h) | 106.88 mph (172.01 km/h) |
| 100 mph (160.93 km/h) | 112.5 mph (181.06 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
