Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-21 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.66 (753.4) | 29.74 (755.5) | 0.08 (2.1) 0.3% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 93.18 (2366.88) | 93.44 (2373.47) | 0.26 (6.6) 0.3% |
| Sidewall Height inches (mm) | 4.33 (110) | 4.87 (123.75) | 0.54 (13.75) 12.5% |
| Revolutions per mile (km) | 679.94 (422.5) | 678.05 (421.32) | -1.89 (-1.17) -0.3% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.06 mph (32.28 km/h) |
| 25 mph (40.23 km/h) | 25.07 mph (40.35 km/h) |
| 30 mph (48.28 km/h) | 30.08 mph (48.41 km/h) |
| 35 mph (56.33 km/h) | 35.1 mph (56.48 km/h) |
| 40 mph (64.37 km/h) | 40.11 mph (64.55 km/h) |
| 45 mph (72.42 km/h) | 45.13 mph (72.62 km/h) |
| 50 mph (80.47 km/h) | 50.14 mph (80.69 km/h) |
| 55 mph (88.51 km/h) | 55.15 mph (88.76 km/h) |
| 60 mph (96.56 km/h) | 60.17 mph (96.83 km/h) |
| 65 mph (104.61 km/h) | 65.18 mph (104.9 km/h) |
| 70 mph (112.65 km/h) | 70.2 mph (112.97 km/h) |
| 75 mph (120.7 km/h) | 75.21 mph (121.04 km/h) |
| 80 mph (128.75 km/h) | 80.22 mph (129.11 km/h) |
| 85 mph (136.79 km/h) | 85.24 mph (137.18 km/h) |
| 90 mph (144.84 km/h) | 90.25 mph (145.24 km/h) |
| 95 mph (152.89 km/h) | 95.26 mph (153.31 km/h) |
| 100 mph (160.93 km/h) | 100.28 mph (161.38 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 |
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