Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 275/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 37.32 (948) | -0.77 (-19.62) -2% |
| Width inches (mm) | 13.5 (343) | 10.83 (275) | -2.68 (-68) -19.8% |
| Circum. inches (mm) | 119.68 (3039.87) | 117.25 (2978.23) | -2.43 (-61.64) -2% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 8.66 (220) | -0.39 (-9.81) -4.3% |
| Revolutions per mile (km) | 529.41 (328.96) | 540.37 (335.77) | 10.96 (6.81) 2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.59 mph (31.53 km/h) |
| 25 mph (40.23 km/h) | 24.49 mph (39.42 km/h) |
| 30 mph (48.28 km/h) | 29.39 mph (47.3 km/h) |
| 35 mph (56.33 km/h) | 34.29 mph (55.19 km/h) |
| 40 mph (64.37 km/h) | 39.19 mph (63.07 km/h) |
| 45 mph (72.42 km/h) | 44.09 mph (70.95 km/h) |
| 50 mph (80.47 km/h) | 48.99 mph (78.84 km/h) |
| 55 mph (88.51 km/h) | 53.88 mph (86.72 km/h) |
| 60 mph (96.56 km/h) | 58.78 mph (94.6 km/h) |
| 65 mph (104.61 km/h) | 63.68 mph (102.49 km/h) |
| 70 mph (112.65 km/h) | 68.58 mph (110.37 km/h) |
| 75 mph (120.7 km/h) | 73.48 mph (118.25 km/h) |
| 80 mph (128.75 km/h) | 78.38 mph (126.14 km/h) |
| 85 mph (136.79 km/h) | 83.28 mph (134.02 km/h) |
| 90 mph (144.84 km/h) | 88.18 mph (141.9 km/h) |
| 95 mph (152.89 km/h) | 93.07 mph (149.79 km/h) |
| 100 mph (160.93 km/h) | 97.97 mph (157.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1375 | 1597 | 1720 | 1796 | 1878 | 1937 | 2001 | 2077 | 2183 | 2288 | 2405 | 2499 | 2668 | 2856 | 3002 | 3096 | 3148 | 3341 | 3610 | 4196 |
Better Fuel Economy Factory Ratios Increased Power
