Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 385/70-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 37.22 (945.4) | -0.77 (-19.64) -2% |
| Width inches (mm) | 15.51 (394) | 15.16 (385) | -0.35 (-9) -2.3% |
| Circum. inches (mm) | 119.36 (3031.76) | 116.93 (2970.06) | -2.43 (-61.7) -2% |
| Sidewall Height inches (mm) | 9 (228.52) | 10.61 (269.5) | 1.61 (40.98) 17.9% |
| Revolutions per mile (km) | 530.83 (329.84) | 541.86 (336.69) | 11.03 (6.85) 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 (39.41 km/h) |
| 30 mph (48.28 km/h) | 29.39 mph (47.3 km/h) |
| 35 mph (56.33 km/h) | 34.29 mph (55.18 km/h) |
| 40 mph (64.37 km/h) | 39.19 mph (63.06 km/h) |
| 45 mph (72.42 km/h) | 44.08 mph (70.95 km/h) |
| 50 mph (80.47 km/h) | 48.98 mph (78.83 km/h) |
| 55 mph (88.51 km/h) | 53.88 mph (86.71 km/h) |
| 60 mph (96.56 km/h) | 58.78 mph (94.6 km/h) |
| 65 mph (104.61 km/h) | 63.68 mph (102.48 km/h) |
| 70 mph (112.65 km/h) | 68.58 mph (110.36 km/h) |
| 75 mph (120.7 km/h) | 73.47 mph (118.24 km/h) |
| 80 mph (128.75 km/h) | 78.37 mph (126.13 km/h) |
| 85 mph (136.79 km/h) | 83.27 mph (134.01 km/h) |
| 90 mph (144.84 km/h) | 88.17 mph (141.89 km/h) |
| 95 mph (152.89 km/h) | 93.07 mph (149.78 km/h) |
| 100 mph (160.93 km/h) | 97.96 mph (157.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1379 | 1602 | 1725 | 1801 | 1884 | 1942 | 2007 | 2083 | 2189 | 2294 | 2412 | 2506 | 2676 | 2863 | 3010 | 3104 | 3157 | 3350 | 3620 | 4207 |
Better Fuel Economy Factory Ratios Increased Power
