Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/35-21 | 275/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.75 (704.9) | 27.5 (698.4) | -0.26 (-6.5) -0.9% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 87.19 (2214.51) | 86.38 (2194.09) | -0.8 (-20.42) -0.9% |
| Sidewall Height inches (mm) | 3.38 (85.75) | 3.25 (82.5) | -0.13 (-3.25) -3.8% |
| Revolutions per mile (km) | 726.73 (451.57) | 733.49 (455.77) | 6.76 (4.2) 0.9% |
275/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.82 mph (31.89 km/h) |
| 25 mph (40.23 km/h) | 24.77 mph (39.86 km/h) |
| 30 mph (48.28 km/h) | 29.72 mph (47.84 km/h) |
| 35 mph (56.33 km/h) | 34.68 mph (55.81 km/h) |
| 40 mph (64.37 km/h) | 39.63 mph (63.78 km/h) |
| 45 mph (72.42 km/h) | 44.59 mph (71.75 km/h) |
| 50 mph (80.47 km/h) | 49.54 mph (79.73 km/h) |
| 55 mph (88.51 km/h) | 54.49 mph (87.7 km/h) |
| 60 mph (96.56 km/h) | 59.45 mph (95.67 km/h) |
| 65 mph (104.61 km/h) | 64.4 mph (103.64 km/h) |
| 70 mph (112.65 km/h) | 69.35 mph (111.62 km/h) |
| 75 mph (120.7 km/h) | 74.31 mph (119.59 km/h) |
| 80 mph (128.75 km/h) | 79.26 mph (127.56 km/h) |
| 85 mph (136.79 km/h) | 84.22 mph (135.53 km/h) |
| 90 mph (144.84 km/h) | 89.17 mph (143.51 km/h) |
| 95 mph (152.89 km/h) | 94.12 mph (151.48 km/h) |
| 100 mph (160.93 km/h) | 99.08 mph (159.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1867 | 2168 | 2335 | 2438 | 2550 | 2629 | 2716 | 2820 | 2963 | 3106 | 3265 | 3392 | 3622 | 3876 | 4075 | 4202 | 4273 | 4535 | 4901 | 5695 |
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