Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-17 | 145/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.13 (663.8) | 27.28 (692.8) | 1.14 (29) 4.4% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 82.1 (2085.39) | 85.69 (2176.5) | 3.59 (91.11) 4.4% |
| Sidewall Height inches (mm) | 4.57 (116) | 5.14 (130.5) | 0.57 (14.5) 12.5% |
| Revolutions per mile (km) | 771.72 (479.53) | 739.42 (459.45) | -32.3 (-20.07) -4.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.87 mph (33.59 km/h) |
| 25 mph (40.23 km/h) | 26.09 mph (41.99 km/h) |
| 30 mph (48.28 km/h) | 31.31 mph (50.39 km/h) |
| 35 mph (56.33 km/h) | 36.53 mph (58.79 km/h) |
| 40 mph (64.37 km/h) | 41.75 mph (67.19 km/h) |
| 45 mph (72.42 km/h) | 46.97 mph (75.58 km/h) |
| 50 mph (80.47 km/h) | 52.18 mph (83.98 km/h) |
| 55 mph (88.51 km/h) | 57.4 mph (92.38 km/h) |
| 60 mph (96.56 km/h) | 62.62 mph (100.78 km/h) |
| 65 mph (104.61 km/h) | 67.84 mph (109.18 km/h) |
| 70 mph (112.65 km/h) | 73.06 mph (117.58 km/h) |
| 75 mph (120.7 km/h) | 78.28 mph (125.97 km/h) |
| 80 mph (128.75 km/h) | 83.5 mph (134.37 km/h) |
| 85 mph (136.79 km/h) | 88.71 mph (142.77 km/h) |
| 90 mph (144.84 km/h) | 93.93 mph (151.17 km/h) |
| 95 mph (152.89 km/h) | 99.15 mph (159.57 km/h) |
| 100 mph (160.93 km/h) | 104.37 mph (167.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1882 | 2186 | 2354 | 2458 | 2570 | 2650 | 2738 | 2843 | 2987 | 3131 | 3291 | 3419 | 3651 | 3907 | 4108 | 4236 | 4308 | 4572 | 4940 | 5741 |
Better Fuel Economy Factory Ratios Increased Power
