Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/30-21 | 275/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.4) | 28.58 (725.9) | -0.1 (-2.5) -0.3% |
| Width inches (mm) | 12.8 (325) | 10.83 (275) | -1.97 (-50) -15.4% |
| Circum. inches (mm) | 90.09 (2288.34) | 89.78 (2280.48) | -0.31 (-7.85) -0.3% |
| Sidewall Height inches (mm) | 3.84 (97.5) | 3.79 (96.25) | -0.05 (-1.25) -1.3% |
| Revolutions per mile (km) | 703.28 (437) | 705.7 (438.5) | 2.42 (1.51) 0.3% |
275/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.93 mph (32.08 km/h) |
| 25 mph (40.23 km/h) | 24.91 mph (40.1 km/h) |
| 30 mph (48.28 km/h) | 29.9 mph (48.11 km/h) |
| 35 mph (56.33 km/h) | 34.88 mph (56.13 km/h) |
| 40 mph (64.37 km/h) | 39.86 mph (64.15 km/h) |
| 45 mph (72.42 km/h) | 44.85 mph (72.17 km/h) |
| 50 mph (80.47 km/h) | 49.83 mph (80.19 km/h) |
| 55 mph (88.51 km/h) | 54.81 mph (88.21 km/h) |
| 60 mph (96.56 km/h) | 59.79 mph (96.23 km/h) |
| 65 mph (104.61 km/h) | 64.78 mph (104.25 km/h) |
| 70 mph (112.65 km/h) | 69.76 mph (112.27 km/h) |
| 75 mph (120.7 km/h) | 74.74 mph (120.29 km/h) |
| 80 mph (128.75 km/h) | 79.73 mph (128.31 km/h) |
| 85 mph (136.79 km/h) | 84.71 mph (136.32 km/h) |
| 90 mph (144.84 km/h) | 89.69 mph (144.34 km/h) |
| 95 mph (152.89 km/h) | 94.67 mph (152.36 km/h) |
| 100 mph (160.93 km/h) | 99.66 mph (160.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1796 | 2086 | 2247 | 2346 | 2453 | 2530 | 2614 | 2713 | 2850 | 2988 | 3141 | 3263 | 3485 | 3729 | 3920 | 4043 | 4111 | 4364 | 4715 | 5479 |
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