Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/90-16 | 155/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.28 (667.4) | 26.71 (678.5) | 0.44 (11.1) 1.7% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 82.55 (2096.7) | 83.92 (2131.57) | 1.37 (34.87) 1.7% |
| Sidewall Height inches (mm) | 5.14 (130.5) | 3.36 (85.25) | -1.78 (-45.25) -34.7% |
| Revolutions per mile (km) | 767.56 (476.94) | 755 (469.14) | -12.56 (-7.8) -1.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.33 mph (32.72 km/h) |
| 25 mph (40.23 km/h) | 25.42 mph (40.9 km/h) |
| 30 mph (48.28 km/h) | 30.5 mph (49.08 km/h) |
| 35 mph (56.33 km/h) | 35.58 mph (57.26 km/h) |
| 40 mph (64.37 km/h) | 40.67 mph (65.44 km/h) |
| 45 mph (72.42 km/h) | 45.75 mph (73.63 km/h) |
| 50 mph (80.47 km/h) | 50.83 mph (81.81 km/h) |
| 55 mph (88.51 km/h) | 55.91 mph (89.99 km/h) |
| 60 mph (96.56 km/h) | 61 mph (98.17 km/h) |
| 65 mph (104.61 km/h) | 66.08 mph (106.35 km/h) |
| 70 mph (112.65 km/h) | 71.16 mph (114.53 km/h) |
| 75 mph (120.7 km/h) | 76.25 mph (122.71 km/h) |
| 80 mph (128.75 km/h) | 81.33 mph (130.89 km/h) |
| 85 mph (136.79 km/h) | 86.41 mph (139.07 km/h) |
| 90 mph (144.84 km/h) | 91.5 mph (147.25 km/h) |
| 95 mph (152.89 km/h) | 96.58 mph (155.43 km/h) |
| 100 mph (160.93 km/h) | 101.66 mph (163.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1921 | 2232 | 2404 | 2510 | 2624 | 2706 | 2796 | 2902 | 3050 | 3197 | 3360 | 3491 | 3728 | 3990 | 4194 | 4325 | 4399 | 4668 | 5045 | 5862 |
Better Fuel Economy Factory Ratios Increased Power
