Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-10 | 31/18-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.09 (434) | 30.83 (783.16) | 13.75 (349.16) 80.5% |
| Width inches (mm) | 8.86 (225) | 17.99 (457) | 9.13 (232) 103.1% |
| Circum. inches (mm) | 53.68 (1363.45) | 96.86 (2460.37) | 43.19 (1096.92) 80.5% |
| Sidewall Height inches (mm) | 3.54 (90) | 7.92 (201.08) | 4.37 (111.08) 123.4% |
| Revolutions per mile (km) | 1180.35 (733.43) | 654.11 (406.44) | -526.24 (-326.99) -44.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 36.09 mph (58.08 km/h) |
| 25 mph (40.23 km/h) | 45.11 mph (72.6 km/h) |
| 30 mph (48.28 km/h) | 54.14 mph (87.12 km/h) |
| 35 mph (56.33 km/h) | 63.16 mph (101.64 km/h) |
| 40 mph (64.37 km/h) | 72.18 mph (116.16 km/h) |
| 45 mph (72.42 km/h) | 81.2 mph (130.68 km/h) |
| 50 mph (80.47 km/h) | 90.23 mph (145.2 km/h) |
| 55 mph (88.51 km/h) | 99.25 mph (159.73 km/h) |
| 60 mph (96.56 km/h) | 108.27 mph (174.25 km/h) |
| 65 mph (104.61 km/h) | 117.29 mph (188.77 km/h) |
| 70 mph (112.65 km/h) | 126.32 mph (203.29 km/h) |
| 75 mph (120.7 km/h) | 135.34 mph (217.81 km/h) |
| 80 mph (128.75 km/h) | 144.36 mph (232.33 km/h) |
| 85 mph (136.79 km/h) | 153.38 mph (246.85 km/h) |
| 90 mph (144.84 km/h) | 162.41 mph (261.37 km/h) |
| 95 mph (152.89 km/h) | 171.43 mph (275.89 km/h) |
| 100 mph (160.93 km/h) | 180.45 mph (290.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1665 | 1934 | 2082 | 2175 | 2274 | 2345 | 2422 | 2515 | 2642 | 2770 | 2911 | 3025 | 3230 | 3457 | 3634 | 3747 | 3811 | 4045 | 4370 | 5079 |
Better Fuel Economy Factory Ratios Increased Power
