Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/35-20 | 285/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.03 (686.5) | 26.73 (679) | -0.3 (-7.5) -1.1% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 84.91 (2156.7) | 83.98 (2133.14) | -0.93 (-23.56) -1.1% |
| Sidewall Height inches (mm) | 3.51 (89.25) | 3.37 (85.5) | -0.15 (-3.75) -4.2% |
| Revolutions per mile (km) | 746.21 (463.67) | 754.45 (468.79) | 8.24 (5.12) 1.1% |
285/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.78 mph (31.84 km/h) |
| 25 mph (40.23 km/h) | 24.73 mph (39.79 km/h) |
| 30 mph (48.28 km/h) | 29.67 mph (47.75 km/h) |
| 35 mph (56.33 km/h) | 34.62 mph (55.71 km/h) |
| 40 mph (64.37 km/h) | 39.56 mph (63.67 km/h) |
| 45 mph (72.42 km/h) | 44.51 mph (71.63 km/h) |
| 50 mph (80.47 km/h) | 49.45 mph (79.59 km/h) |
| 55 mph (88.51 km/h) | 54.4 mph (87.55 km/h) |
| 60 mph (96.56 km/h) | 59.34 mph (95.51 km/h) |
| 65 mph (104.61 km/h) | 64.29 mph (103.46 km/h) |
| 70 mph (112.65 km/h) | 69.24 mph (111.42 km/h) |
| 75 mph (120.7 km/h) | 74.18 mph (119.38 km/h) |
| 80 mph (128.75 km/h) | 79.13 mph (127.34 km/h) |
| 85 mph (136.79 km/h) | 84.07 mph (135.3 km/h) |
| 90 mph (144.84 km/h) | 89.02 mph (143.26 km/h) |
| 95 mph (152.89 km/h) | 93.96 mph (151.22 km/h) |
| 100 mph (160.93 km/h) | 98.91 mph (159.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1920 | 2230 | 2402 | 2508 | 2623 | 2704 | 2794 | 2900 | 3047 | 3194 | 3358 | 3489 | 3725 | 3987 | 4191 | 4322 | 4395 | 4665 | 5041 | 5858 |
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