Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/40-21 | 285/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.72 (729.4) | 28.85 (732.9) | 0.14 (3.5) 0.5% |
| Width inches (mm) | 9.65 (245) | 11.22 (285) | 1.57 (40) 16.3% |
| Circum. inches (mm) | 90.22 (2291.48) | 90.65 (2302.47) | 0.43 (11) 0.5% |
| Sidewall Height inches (mm) | 3.86 (98) | 3.93 (99.75) | 0.07 (1.75) 1.8% |
| Revolutions per mile (km) | 702.32 (436.4) | 698.96 (434.31) | -3.35 (-2.08) -0.5% |
285/35-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.1 mph (32.34 km/h) |
| 25 mph (40.23 km/h) | 25.12 mph (40.43 km/h) |
| 30 mph (48.28 km/h) | 30.14 mph (48.51 km/h) |
| 35 mph (56.33 km/h) | 35.17 mph (56.6 km/h) |
| 40 mph (64.37 km/h) | 40.19 mph (64.68 km/h) |
| 45 mph (72.42 km/h) | 45.22 mph (72.77 km/h) |
| 50 mph (80.47 km/h) | 50.24 mph (80.85 km/h) |
| 55 mph (88.51 km/h) | 55.26 mph (88.94 km/h) |
| 60 mph (96.56 km/h) | 60.29 mph (97.02 km/h) |
| 65 mph (104.61 km/h) | 65.31 mph (105.11 km/h) |
| 70 mph (112.65 km/h) | 70.34 mph (113.19 km/h) |
| 75 mph (120.7 km/h) | 75.36 mph (121.28 km/h) |
| 80 mph (128.75 km/h) | 80.38 mph (129.37 km/h) |
| 85 mph (136.79 km/h) | 85.41 mph (137.45 km/h) |
| 90 mph (144.84 km/h) | 90.43 mph (145.54 km/h) |
| 95 mph (152.89 km/h) | 95.46 mph (153.62 km/h) |
| 100 mph (160.93 km/h) | 100.48 mph (161.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1779 | 2066 | 2225 | 2324 | 2430 | 2505 | 2589 | 2687 | 2823 | 2960 | 3111 | 3232 | 3451 | 3694 | 3883 | 4004 | 4072 | 4322 | 4670 | 5427 |
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