Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-20 | 285/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.97 (685) | 26.73 (679) | -0.24 (-6) -0.9% |
| Width inches (mm) | 11.61 (295) | 11.22 (285) | -0.39 (-10) -3.4% |
| Circum. inches (mm) | 84.72 (2151.99) | 83.98 (2133.14) | -0.74 (-18.85) -0.9% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 3.37 (85.5) | -0.12 (-3) -3.4% |
| Revolutions per mile (km) | 747.84 (464.69) | 754.45 (468.79) | 6.61 (4.11) 0.9% |
285/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.82 mph (31.91 km/h) |
| 25 mph (40.23 km/h) | 24.78 mph (39.88 km/h) |
| 30 mph (48.28 km/h) | 29.74 mph (47.86 km/h) |
| 35 mph (56.33 km/h) | 34.69 mph (55.83 km/h) |
| 40 mph (64.37 km/h) | 39.65 mph (63.81 km/h) |
| 45 mph (72.42 km/h) | 44.61 mph (71.79 km/h) |
| 50 mph (80.47 km/h) | 49.56 mph (79.76 km/h) |
| 55 mph (88.51 km/h) | 54.52 mph (87.74 km/h) |
| 60 mph (96.56 km/h) | 59.47 mph (95.72 km/h) |
| 65 mph (104.61 km/h) | 64.43 mph (103.69 km/h) |
| 70 mph (112.65 km/h) | 69.39 mph (111.67 km/h) |
| 75 mph (120.7 km/h) | 74.34 mph (119.64 km/h) |
| 80 mph (128.75 km/h) | 79.3 mph (127.62 km/h) |
| 85 mph (136.79 km/h) | 84.26 mph (135.6 km/h) |
| 90 mph (144.84 km/h) | 89.21 mph (143.57 km/h) |
| 95 mph (152.89 km/h) | 94.17 mph (151.55 km/h) |
| 100 mph (160.93 km/h) | 99.12 mph (159.53 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 |
Better Fuel Economy Factory Ratios Increased Power
