Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-21 | 275/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.73 (704.4) | 28.58 (725.9) | 0.85 (21.5) 3.1% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 87.12 (2212.94) | 89.78 (2280.48) | 2.66 (67.54) 3.1% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 3.79 (96.25) | 0.42 (10.75) 12.6% |
| Revolutions per mile (km) | 727.24 (451.89) | 705.7 (438.5) | -21.54 (-13.38) -3% |
275/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.61 mph (33.17 km/h) |
| 25 mph (40.23 km/h) | 25.76 mph (41.46 km/h) |
| 30 mph (48.28 km/h) | 30.92 mph (49.75 km/h) |
| 35 mph (56.33 km/h) | 36.07 mph (58.05 km/h) |
| 40 mph (64.37 km/h) | 41.22 mph (66.34 km/h) |
| 45 mph (72.42 km/h) | 46.37 mph (74.63 km/h) |
| 50 mph (80.47 km/h) | 51.53 mph (82.92 km/h) |
| 55 mph (88.51 km/h) | 56.68 mph (91.22 km/h) |
| 60 mph (96.56 km/h) | 61.83 mph (99.51 km/h) |
| 65 mph (104.61 km/h) | 66.98 mph (107.8 km/h) |
| 70 mph (112.65 km/h) | 72.14 mph (116.09 km/h) |
| 75 mph (120.7 km/h) | 77.29 mph (124.39 km/h) |
| 80 mph (128.75 km/h) | 82.44 mph (132.68 km/h) |
| 85 mph (136.79 km/h) | 87.59 mph (140.97 km/h) |
| 90 mph (144.84 km/h) | 92.75 mph (149.26 km/h) |
| 95 mph (152.89 km/h) | 97.9 mph (157.55 km/h) |
| 100 mph (160.93 km/h) | 103.05 mph (165.85 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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