Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-20 | 285/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.07 (865.5) | 34.59 (878.5) | 0.51 (13) 1.5% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 107.05 (2719.05) | 108.66 (2759.89) | 1.61 (40.84) 1.5% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 7.29 (185.25) | 0.26 (6.5) 3.6% |
| Revolutions per mile (km) | 591.88 (367.78) | 583.12 (362.33) | -8.76 (-5.44) -1.5% |
285/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.3 mph (32.67 km/h) |
| 25 mph (40.23 km/h) | 25.38 mph (40.84 km/h) |
| 30 mph (48.28 km/h) | 30.45 mph (49.01 km/h) |
| 35 mph (56.33 km/h) | 35.53 mph (57.17 km/h) |
| 40 mph (64.37 km/h) | 40.6 mph (65.34 km/h) |
| 45 mph (72.42 km/h) | 45.68 mph (73.51 km/h) |
| 50 mph (80.47 km/h) | 50.75 mph (81.68 km/h) |
| 55 mph (88.51 km/h) | 55.83 mph (89.84 km/h) |
| 60 mph (96.56 km/h) | 60.9 mph (98.01 km/h) |
| 65 mph (104.61 km/h) | 65.98 mph (106.18 km/h) |
| 70 mph (112.65 km/h) | 71.05 mph (114.35 km/h) |
| 75 mph (120.7 km/h) | 76.13 mph (122.51 km/h) |
| 80 mph (128.75 km/h) | 81.2 mph (130.68 km/h) |
| 85 mph (136.79 km/h) | 86.28 mph (138.85 km/h) |
| 90 mph (144.84 km/h) | 91.35 mph (147.02 km/h) |
| 95 mph (152.89 km/h) | 96.43 mph (155.18 km/h) |
| 100 mph (160.93 km/h) | 101.5 mph (163.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1484 | 1724 | 1856 | 1939 | 2027 | 2090 | 2160 | 2242 | 2355 | 2469 | 2595 | 2696 | 2879 | 3082 | 3239 | 3340 | 3397 | 3606 | 3896 | 4528 |
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