Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 215/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 25.08 (637) | -0.24 (-6) -0.9% |
| Width inches (mm) | 8.86 (225) | 8.46 (215) | -0.39 (-10) -4.4% |
| Circum. inches (mm) | 79.53 (2020.04) | 78.79 (2001.19) | -0.74 (-18.85) -0.9% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 2.54 (64.5) | -0.12 (-3) -4.4% |
| Revolutions per mile (km) | 796.69 (495.04) | 804.19 (499.7) | 7.5 (4.66) 0.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.81 mph (31.89 km/h) |
| 25 mph (40.23 km/h) | 24.77 mph (39.86 km/h) |
| 30 mph (48.28 km/h) | 29.72 mph (47.83 km/h) |
| 35 mph (56.33 km/h) | 34.67 mph (55.8 km/h) |
| 40 mph (64.37 km/h) | 39.63 mph (63.77 km/h) |
| 45 mph (72.42 km/h) | 44.58 mph (71.74 km/h) |
| 50 mph (80.47 km/h) | 49.53 mph (79.72 km/h) |
| 55 mph (88.51 km/h) | 54.49 mph (87.69 km/h) |
| 60 mph (96.56 km/h) | 59.44 mph (95.66 km/h) |
| 65 mph (104.61 km/h) | 64.39 mph (103.63 km/h) |
| 70 mph (112.65 km/h) | 69.35 mph (111.6 km/h) |
| 75 mph (120.7 km/h) | 74.3 mph (119.57 km/h) |
| 80 mph (128.75 km/h) | 79.25 mph (127.55 km/h) |
| 85 mph (136.79 km/h) | 84.21 mph (135.52 km/h) |
| 90 mph (144.84 km/h) | 89.16 mph (143.49 km/h) |
| 95 mph (152.89 km/h) | 94.11 mph (151.46 km/h) |
| 100 mph (160.93 km/h) | 99.07 mph (159.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2047 | 2377 | 2560 | 2674 | 2795 | 2883 | 2978 | 3092 | 3248 | 3405 | 3579 | 3719 | 3971 | 4250 | 4467 | 4607 | 4685 | 4973 | 5373 | 6244 |
Better Fuel Economy Factory Ratios Increased Power
