Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/90-16 | 31/7.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.94 (811.4) | 31.04 (788.4) | -0.91 (-23) -2.8% |
| Width inches (mm) | 8.86 (225) | 7.52 (191) | -1.34 (-34) -15.1% |
| Circum. inches (mm) | 100.36 (2549.09) | 97.51 (2476.83) | -2.84 (-72.26) -2.8% |
| Sidewall Height inches (mm) | 7.97 (202.5) | 7.52 (191) | -0.45 (-11.5) -5.7% |
| Revolutions per mile (km) | 631.34 (392.3) | 649.76 (403.74) | 18.42 (11.44) 2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.43 mph (31.27 km/h) |
| 25 mph (40.23 km/h) | 24.29 mph (39.09 km/h) |
| 30 mph (48.28 km/h) | 29.15 mph (46.91 km/h) |
| 35 mph (56.33 km/h) | 34.01 mph (54.73 km/h) |
| 40 mph (64.37 km/h) | 38.87 mph (62.55 km/h) |
| 45 mph (72.42 km/h) | 43.72 mph (70.37 km/h) |
| 50 mph (80.47 km/h) | 48.58 mph (78.19 km/h) |
| 55 mph (88.51 km/h) | 53.44 mph (86.01 km/h) |
| 60 mph (96.56 km/h) | 58.3 mph (93.82 km/h) |
| 65 mph (104.61 km/h) | 63.16 mph (101.64 km/h) |
| 70 mph (112.65 km/h) | 68.02 mph (109.46 km/h) |
| 75 mph (120.7 km/h) | 72.87 mph (117.28 km/h) |
| 80 mph (128.75 km/h) | 77.73 mph (125.1 km/h) |
| 85 mph (136.79 km/h) | 82.59 mph (132.92 km/h) |
| 90 mph (144.84 km/h) | 87.45 mph (140.74 km/h) |
| 95 mph (152.89 km/h) | 92.31 mph (148.55 km/h) |
| 100 mph (160.93 km/h) | 97.17 mph (156.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1654 | 1921 | 2069 | 2160 | 2259 | 2329 | 2406 | 2498 | 2625 | 2751 | 2892 | 3004 | 3209 | 3434 | 3610 | 3722 | 3785 | 4018 | 4341 | 5045 |
Better Fuel Economy Factory Ratios Increased Power
