Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 35/15.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 34.89 (886.24) | -3.1 (-78.8) -8.2% |
| Width inches (mm) | 15.51 (394) | 15.51 (394) | 0 (0) 0% |
| Circum. inches (mm) | 119.36 (3031.76) | 109.61 (2784.21) | -9.75 (-247.56) -8.2% |
| Sidewall Height inches (mm) | 9 (228.52) | 7.45 (189.12) | -1.55 (-39.4) -17.2% |
| Revolutions per mile (km) | 530.83 (329.84) | 578.03 (359.17) | 47.2 (29.33) 8.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.37 mph (29.56 km/h) |
| 25 mph (40.23 km/h) | 22.96 mph (36.95 km/h) |
| 30 mph (48.28 km/h) | 27.55 mph (44.34 km/h) |
| 35 mph (56.33 km/h) | 32.14 mph (51.73 km/h) |
| 40 mph (64.37 km/h) | 36.73 mph (59.12 km/h) |
| 45 mph (72.42 km/h) | 41.33 mph (66.51 km/h) |
| 50 mph (80.47 km/h) | 45.92 mph (73.9 km/h) |
| 55 mph (88.51 km/h) | 50.51 mph (81.29 km/h) |
| 60 mph (96.56 km/h) | 55.1 mph (88.68 km/h) |
| 65 mph (104.61 km/h) | 59.69 mph (96.07 km/h) |
| 70 mph (112.65 km/h) | 64.28 mph (103.46 km/h) |
| 75 mph (120.7 km/h) | 68.88 mph (110.85 km/h) |
| 80 mph (128.75 km/h) | 73.47 mph (118.23 km/h) |
| 85 mph (136.79 km/h) | 78.06 mph (125.62 km/h) |
| 90 mph (144.84 km/h) | 82.65 mph (133.01 km/h) |
| 95 mph (152.89 km/h) | 87.24 mph (140.4 km/h) |
| 100 mph (160.93 km/h) | 91.83 mph (147.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1471 | 1709 | 1840 | 1922 | 2009 | 2072 | 2141 | 2222 | 2335 | 2447 | 2573 | 2673 | 2854 | 3055 | 3211 | 3311 | 3368 | 3574 | 3862 | 4488 |
Better Fuel Economy Factory Ratios Increased Power
