Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/80-15 | 30/8.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.17 (741) | 29.97 (761.16) | 0.79 (20.16) 2.7% |
| Width inches (mm) | 8.86 (225) | 8.5 (216) | -0.35 (-9) -4% |
| Circum. inches (mm) | 91.65 (2327.92) | 94.14 (2391.25) | 2.49 (63.33) 2.7% |
| Sidewall Height inches (mm) | 7.09 (180) | 7.48 (190.08) | 0.4 (10.08) 5.6% |
| Revolutions per mile (km) | 691.32 (429.57) | 673.01 (418.19) | -18.31 (-11.38) -2.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.54 mph (33.06 km/h) |
| 25 mph (40.23 km/h) | 25.68 mph (41.33 km/h) |
| 30 mph (48.28 km/h) | 30.82 mph (49.59 km/h) |
| 35 mph (56.33 km/h) | 35.95 mph (57.86 km/h) |
| 40 mph (64.37 km/h) | 41.09 mph (66.13 km/h) |
| 45 mph (72.42 km/h) | 46.22 mph (74.39 km/h) |
| 50 mph (80.47 km/h) | 51.36 mph (82.66 km/h) |
| 55 mph (88.51 km/h) | 56.5 mph (90.92 km/h) |
| 60 mph (96.56 km/h) | 61.63 mph (99.19 km/h) |
| 65 mph (104.61 km/h) | 66.77 mph (107.45 km/h) |
| 70 mph (112.65 km/h) | 71.9 mph (115.72 km/h) |
| 75 mph (120.7 km/h) | 77.04 mph (123.98 km/h) |
| 80 mph (128.75 km/h) | 82.18 mph (132.25 km/h) |
| 85 mph (136.79 km/h) | 87.31 mph (140.52 km/h) |
| 90 mph (144.84 km/h) | 92.45 mph (148.78 km/h) |
| 95 mph (152.89 km/h) | 97.58 mph (157.05 km/h) |
| 100 mph (160.93 km/h) | 102.72 mph (165.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1713 | 1990 | 2143 | 2237 | 2339 | 2412 | 2493 | 2587 | 2718 | 2850 | 2995 | 3112 | 3323 | 3557 | 3739 | 3855 | 3921 | 4161 | 4497 | 5226 |
Better Fuel Economy Factory Ratios Increased Power
