Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 29.74 (755.5) | 0.05 (1.3) 0.2% |
| Width inches (mm) | 6.5 (165) | 10.83 (275) | 4.33 (110) 66.7% |
| Circum. inches (mm) | 93.28 (2369.39) | 93.44 (2373.47) | 0.16 (4.08) 0.2% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 4.87 (123.75) | -0.97 (-24.75) -16.7% |
| Revolutions per mile (km) | 679.22 (422.05) | 678.05 (421.32) | -1.17 (-0.73) -0.2% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.03 mph (32.24 km/h) |
| 25 mph (40.23 km/h) | 25.04 mph (40.3 km/h) |
| 30 mph (48.28 km/h) | 30.05 mph (48.36 km/h) |
| 35 mph (56.33 km/h) | 35.06 mph (56.42 km/h) |
| 40 mph (64.37 km/h) | 40.07 mph (64.48 km/h) |
| 45 mph (72.42 km/h) | 45.08 mph (72.55 km/h) |
| 50 mph (80.47 km/h) | 50.09 mph (80.61 km/h) |
| 55 mph (88.51 km/h) | 55.09 mph (88.67 km/h) |
| 60 mph (96.56 km/h) | 60.1 mph (96.73 km/h) |
| 65 mph (104.61 km/h) | 65.11 mph (104.79 km/h) |
| 70 mph (112.65 km/h) | 70.12 mph (112.85 km/h) |
| 75 mph (120.7 km/h) | 75.13 mph (120.91 km/h) |
| 80 mph (128.75 km/h) | 80.14 mph (128.97 km/h) |
| 85 mph (136.79 km/h) | 85.15 mph (137.03 km/h) |
| 90 mph (144.84 km/h) | 90.16 mph (145.09 km/h) |
| 95 mph (152.89 km/h) | 95.16 mph (153.15 km/h) |
| 100 mph (160.93 km/h) | 100.17 mph (161.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1726 | 2005 | 2159 | 2254 | 2357 | 2430 | 2511 | 2607 | 2739 | 2871 | 3018 | 3135 | 3348 | 3583 | 3767 | 3884 | 3950 | 4193 | 4530 | 5265 |
Better Fuel Economy Factory Ratios Increased Power
