Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/60-18 | 275/45-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.52 (775.2) | 30.74 (780.9) | 0.22 (5.7) 0.7% |
| Width inches (mm) | 10.43 (265) | 10.83 (275) | 0.39 (10) 3.8% |
| Circum. inches (mm) | 95.88 (2435.36) | 96.59 (2453.27) | 0.71 (17.91) 0.7% |
| Sidewall Height inches (mm) | 6.26 (159) | 4.87 (123.75) | -1.39 (-35.25) -22.2% |
| Revolutions per mile (km) | 660.82 (410.62) | 656 (407.62) | -4.82 (-3) -0.7% |
275/45-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.15 mph (32.42 km/h) |
| 25 mph (40.23 km/h) | 25.18 mph (40.53 km/h) |
| 30 mph (48.28 km/h) | 30.22 mph (48.64 km/h) |
| 35 mph (56.33 km/h) | 35.26 mph (56.74 km/h) |
| 40 mph (64.37 km/h) | 40.29 mph (64.85 km/h) |
| 45 mph (72.42 km/h) | 45.33 mph (72.95 km/h) |
| 50 mph (80.47 km/h) | 50.37 mph (81.06 km/h) |
| 55 mph (88.51 km/h) | 55.4 mph (89.16 km/h) |
| 60 mph (96.56 km/h) | 60.44 mph (97.27 km/h) |
| 65 mph (104.61 km/h) | 65.48 mph (105.38 km/h) |
| 70 mph (112.65 km/h) | 70.51 mph (113.48 km/h) |
| 75 mph (120.7 km/h) | 75.55 mph (121.59 km/h) |
| 80 mph (128.75 km/h) | 80.59 mph (129.69 km/h) |
| 85 mph (136.79 km/h) | 85.63 mph (137.8 km/h) |
| 90 mph (144.84 km/h) | 90.66 mph (145.91 km/h) |
| 95 mph (152.89 km/h) | 95.7 mph (154.01 km/h) |
| 100 mph (160.93 km/h) | 100.74 mph (162.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1669 | 1939 | 2089 | 2181 | 2280 | 2351 | 2430 | 2522 | 2650 | 2778 | 2920 | 3033 | 3239 | 3467 | 3644 | 3758 | 3822 | 4056 | 4383 | 5093 |
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