Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/13.5-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.1 (967.62) | 35.02 (889.6) | -3.07 (-78.02) -8.1% |
| Width inches (mm) | 13.5 (343) | 12.52 (318) | -0.98 (-25) -7.3% |
| Circum. inches (mm) | 119.68 (3039.87) | 110.03 (2794.76) | -9.65 (-245.11) -8.1% |
| Sidewall Height inches (mm) | 9.05 (229.81) | 7.51 (190.8) | -1.54 (-39.01) -17% |
| Revolutions per mile (km) | 529.41 (328.96) | 575.84 (357.81) | 46.43 (28.85) 8.8% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.39 mph (29.59 km/h) |
| 25 mph (40.23 km/h) | 22.98 mph (36.99 km/h) |
| 30 mph (48.28 km/h) | 27.58 mph (44.39 km/h) |
| 35 mph (56.33 km/h) | 32.18 mph (51.79 km/h) |
| 40 mph (64.37 km/h) | 36.77 mph (59.18 km/h) |
| 45 mph (72.42 km/h) | 41.37 mph (66.58 km/h) |
| 50 mph (80.47 km/h) | 45.97 mph (73.98 km/h) |
| 55 mph (88.51 km/h) | 50.57 mph (81.38 km/h) |
| 60 mph (96.56 km/h) | 55.16 mph (88.78 km/h) |
| 65 mph (104.61 km/h) | 59.76 mph (96.17 km/h) |
| 70 mph (112.65 km/h) | 64.36 mph (103.57 km/h) |
| 75 mph (120.7 km/h) | 68.95 mph (110.97 km/h) |
| 80 mph (128.75 km/h) | 73.55 mph (118.37 km/h) |
| 85 mph (136.79 km/h) | 78.15 mph (125.76 km/h) |
| 90 mph (144.84 km/h) | 82.74 mph (133.16 km/h) |
| 95 mph (152.89 km/h) | 87.34 mph (140.56 km/h) |
| 100 mph (160.93 km/h) | 91.94 mph (147.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1833 | 1914 | 2002 | 2064 | 2133 | 2214 | 2326 | 2438 | 2563 | 2663 | 2844 | 3043 | 3199 | 3299 | 3355 | 3561 | 3847 | 4471 |
Better Fuel Economy Factory Ratios Increased Power
