Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 215/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 25.08 (637) | -0.33 (-8.5) -1.3% |
| Width inches (mm) | 10.83 (275) | 8.46 (215) | -2.36 (-60) -21.8% |
| Circum. inches (mm) | 79.84 (2027.9) | 78.79 (2001.19) | -1.05 (-26.7) -1.3% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 2.54 (64.5) | -0.17 (-4.25) -6.2% |
| Revolutions per mile (km) | 793.6 (493.12) | 804.19 (499.7) | 10.59 (6.58) 1.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.74 mph (31.76 km/h) |
| 25 mph (40.23 km/h) | 24.67 mph (39.7 km/h) |
| 30 mph (48.28 km/h) | 29.6 mph (47.64 km/h) |
| 35 mph (56.33 km/h) | 34.54 mph (55.59 km/h) |
| 40 mph (64.37 km/h) | 39.47 mph (63.53 km/h) |
| 45 mph (72.42 km/h) | 44.41 mph (71.47 km/h) |
| 50 mph (80.47 km/h) | 49.34 mph (79.41 km/h) |
| 55 mph (88.51 km/h) | 54.28 mph (87.35 km/h) |
| 60 mph (96.56 km/h) | 59.21 mph (95.29 km/h) |
| 65 mph (104.61 km/h) | 64.14 mph (103.23 km/h) |
| 70 mph (112.65 km/h) | 69.08 mph (111.17 km/h) |
| 75 mph (120.7 km/h) | 74.01 mph (119.11 km/h) |
| 80 mph (128.75 km/h) | 78.95 mph (127.05 km/h) |
| 85 mph (136.79 km/h) | 83.88 mph (134.99 km/h) |
| 90 mph (144.84 km/h) | 88.81 mph (142.93 km/h) |
| 95 mph (152.89 km/h) | 93.75 mph (150.87 km/h) |
| 100 mph (160.93 km/h) | 98.68 mph (158.82 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
