Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/70-15 | 31.5/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.78 (731) | 31.61 (802.86) | 2.83 (71.86) 9.8% |
| Width inches (mm) | 9.84 (250) | 10.51 (267) | 0.67 (17) 6.8% |
| Circum. inches (mm) | 90.41 (2296.5) | 99.3 (2522.26) | 8.89 (225.75) 9.8% |
| Sidewall Height inches (mm) | 6.89 (175) | 8.3 (210.93) | 1.41 (35.93) 20.5% |
| Revolutions per mile (km) | 700.78 (435.44) | 638.06 (396.47) | -62.72 (-38.97) -9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.97 mph (35.35 km/h) |
| 25 mph (40.23 km/h) | 27.46 mph (44.19 km/h) |
| 30 mph (48.28 km/h) | 32.95 mph (53.03 km/h) |
| 35 mph (56.33 km/h) | 38.44 mph (61.86 km/h) |
| 40 mph (64.37 km/h) | 43.93 mph (70.7 km/h) |
| 45 mph (72.42 km/h) | 49.42 mph (79.54 km/h) |
| 50 mph (80.47 km/h) | 54.92 mph (88.38 km/h) |
| 55 mph (88.51 km/h) | 60.41 mph (97.22 km/h) |
| 60 mph (96.56 km/h) | 65.9 mph (106.05 km/h) |
| 65 mph (104.61 km/h) | 71.39 mph (114.89 km/h) |
| 70 mph (112.65 km/h) | 76.88 mph (123.73 km/h) |
| 75 mph (120.7 km/h) | 82.37 mph (132.57 km/h) |
| 80 mph (128.75 km/h) | 87.86 mph (141.4 km/h) |
| 85 mph (136.79 km/h) | 93.36 mph (150.24 km/h) |
| 90 mph (144.84 km/h) | 98.85 mph (159.08 km/h) |
| 95 mph (152.89 km/h) | 104.34 mph (167.92 km/h) |
| 100 mph (160.93 km/h) | 109.83 mph (176.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1624 | 1886 | 2031 | 2121 | 2218 | 2287 | 2363 | 2453 | 2577 | 2702 | 2840 | 2950 | 3151 | 3372 | 3545 | 3655 | 3717 | 3945 | 4263 | 4954 |
Better Fuel Economy Factory Ratios Increased Power
