Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/80-15 | 29/9-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.17 (741) | 29.06 (738.24) | -0.11 (-2.76) -0.4% |
| Width inches (mm) | 8.86 (225) | 9.02 (229) | 0.16 (4) 1.8% |
| Circum. inches (mm) | 91.65 (2327.92) | 91.31 (2319.25) | -0.34 (-8.67) -0.4% |
| Sidewall Height inches (mm) | 7.09 (180) | 7.03 (178.62) | -0.05 (-1.38) -0.8% |
| Revolutions per mile (km) | 691.32 (429.57) | 693.91 (431.17) | 2.58 (1.61) 0.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.93 mph (32.07 km/h) |
| 25 mph (40.23 km/h) | 24.91 mph (40.08 km/h) |
| 30 mph (48.28 km/h) | 29.89 mph (48.1 km/h) |
| 35 mph (56.33 km/h) | 34.87 mph (56.12 km/h) |
| 40 mph (64.37 km/h) | 39.85 mph (64.13 km/h) |
| 45 mph (72.42 km/h) | 44.83 mph (72.15 km/h) |
| 50 mph (80.47 km/h) | 49.81 mph (80.17 km/h) |
| 55 mph (88.51 km/h) | 54.8 mph (88.18 km/h) |
| 60 mph (96.56 km/h) | 59.78 mph (96.2 km/h) |
| 65 mph (104.61 km/h) | 64.76 mph (104.22 km/h) |
| 70 mph (112.65 km/h) | 69.74 mph (112.23 km/h) |
| 75 mph (120.7 km/h) | 74.72 mph (120.25 km/h) |
| 80 mph (128.75 km/h) | 79.7 mph (128.27 km/h) |
| 85 mph (136.79 km/h) | 84.68 mph (136.28 km/h) |
| 90 mph (144.84 km/h) | 89.66 mph (144.3 km/h) |
| 95 mph (152.89 km/h) | 94.65 mph (152.32 km/h) |
| 100 mph (160.93 km/h) | 99.63 mph (160.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1766 | 2051 | 2209 | 2307 | 2412 | 2487 | 2570 | 2668 | 2803 | 2938 | 3088 | 3209 | 3427 | 3667 | 3855 | 3975 | 4043 | 4291 | 4636 | 5388 |
Better Fuel Economy Factory Ratios Increased Power
