Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-21 | 275/65-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.41 (670.9) | 35.07 (890.9) | 8.66 (220) 32.8% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 82.98 (2107.69) | 110.19 (2798.84) | 27.21 (691.15) 32.8% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 7.04 (178.75) | 4.33 (110) 160% |
| Revolutions per mile (km) | 763.56 (474.45) | 575 (357.29) | -188.55 (-117.16) -24.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.56 mph (42.74 km/h) |
| 25 mph (40.23 km/h) | 33.2 mph (53.43 km/h) |
| 30 mph (48.28 km/h) | 39.84 mph (64.11 km/h) |
| 35 mph (56.33 km/h) | 46.48 mph (74.8 km/h) |
| 40 mph (64.37 km/h) | 53.12 mph (85.48 km/h) |
| 45 mph (72.42 km/h) | 59.76 mph (96.17 km/h) |
| 50 mph (80.47 km/h) | 66.4 mph (106.85 km/h) |
| 55 mph (88.51 km/h) | 73.04 mph (117.54 km/h) |
| 60 mph (96.56 km/h) | 79.68 mph (128.22 km/h) |
| 65 mph (104.61 km/h) | 86.31 mph (138.91 km/h) |
| 70 mph (112.65 km/h) | 92.95 mph (149.6 km/h) |
| 75 mph (120.7 km/h) | 99.59 mph (160.28 km/h) |
| 80 mph (128.75 km/h) | 106.23 mph (170.97 km/h) |
| 85 mph (136.79 km/h) | 112.87 mph (181.65 km/h) |
| 90 mph (144.84 km/h) | 119.51 mph (192.34 km/h) |
| 95 mph (152.89 km/h) | 126.15 mph (203.02 km/h) |
| 100 mph (160.93 km/h) | 132.79 mph (213.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1463 | 1700 | 1831 | 1912 | 1999 | 2061 | 2130 | 2210 | 2323 | 2435 | 2559 | 2659 | 2839 | 3039 | 3194 | 3294 | 3350 | 3555 | 3842 | 4465 |
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