Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/60-20 | 305/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.99 (838) | 33.01 (838.5) | 0.02 (0.5) 0.1% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 103.65 (2632.65) | 103.71 (2634.23) | 0.06 (1.57) 0.1% |
| Sidewall Height inches (mm) | 6.5 (165) | 9.01 (228.75) | 2.51 (63.75) 38.6% |
| Revolutions per mile (km) | 611.3 (379.84) | 610.94 (379.62) | -0.36 (-0.23) -0.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.01 mph (32.21 km/h) |
| 25 mph (40.23 km/h) | 25.01 mph (40.26 km/h) |
| 30 mph (48.28 km/h) | 30.02 mph (48.31 km/h) |
| 35 mph (56.33 km/h) | 35.02 mph (56.36 km/h) |
| 40 mph (64.37 km/h) | 40.02 mph (64.41 km/h) |
| 45 mph (72.42 km/h) | 45.03 mph (72.46 km/h) |
| 50 mph (80.47 km/h) | 50.03 mph (80.52 km/h) |
| 55 mph (88.51 km/h) | 55.03 mph (88.57 km/h) |
| 60 mph (96.56 km/h) | 60.04 mph (96.62 km/h) |
| 65 mph (104.61 km/h) | 65.04 mph (104.67 km/h) |
| 70 mph (112.65 km/h) | 70.04 mph (112.72 km/h) |
| 75 mph (120.7 km/h) | 75.04 mph (120.77 km/h) |
| 80 mph (128.75 km/h) | 80.05 mph (128.82 km/h) |
| 85 mph (136.79 km/h) | 85.05 mph (136.88 km/h) |
| 90 mph (144.84 km/h) | 90.05 mph (144.93 km/h) |
| 95 mph (152.89 km/h) | 95.06 mph (152.98 km/h) |
| 100 mph (160.93 km/h) | 100.06 mph (161.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1555 | 1806 | 1945 | 2031 | 2124 | 2190 | 2263 | 2349 | 2468 | 2587 | 2719 | 2825 | 3017 | 3229 | 3394 | 3500 | 3559 | 3778 | 4082 | 4744 |
Better Fuel Economy Factory Ratios Increased Power
