Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 385/70-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 37.22 (945.4) | -0.87 (-22.22) -2.3% |
| Width inches (mm) | 13.5 (343) | 15.16 (385) | 1.65 (42) 12.2% |
| Circum. inches (mm) | 119.68 (3039.87) | 116.93 (2970.06) | -2.75 (-69.81) -2.3% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 10.61 (269.5) | 1.56 (39.69) 17.3% |
| Revolutions per mile (km) | 529.41 (328.96) | 541.86 (336.69) | 12.44 (7.73) 2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.54 mph (31.45 km/h) |
| 25 mph (40.23 km/h) | 24.43 mph (39.31 km/h) |
| 30 mph (48.28 km/h) | 29.31 mph (47.17 km/h) |
| 35 mph (56.33 km/h) | 34.2 mph (55.03 km/h) |
| 40 mph (64.37 km/h) | 39.08 mph (62.9 km/h) |
| 45 mph (72.42 km/h) | 43.97 mph (70.76 km/h) |
| 50 mph (80.47 km/h) | 48.85 mph (78.62 km/h) |
| 55 mph (88.51 km/h) | 53.74 mph (86.48 km/h) |
| 60 mph (96.56 km/h) | 58.62 mph (94.34 km/h) |
| 65 mph (104.61 km/h) | 63.51 mph (102.21 km/h) |
| 70 mph (112.65 km/h) | 68.39 mph (110.07 km/h) |
| 75 mph (120.7 km/h) | 73.28 mph (117.93 km/h) |
| 80 mph (128.75 km/h) | 78.16 mph (125.79 km/h) |
| 85 mph (136.79 km/h) | 83.05 mph (133.65 km/h) |
| 90 mph (144.84 km/h) | 87.93 mph (141.52 km/h) |
| 95 mph (152.89 km/h) | 92.82 mph (149.38 km/h) |
| 100 mph (160.93 km/h) | 97.7 mph (157.24 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 |
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