Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 30/9.5-15 | 32/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.99 (761.78) | 32.03 (813.54) | 2.04 (51.76) 6.8% |
| Width inches (mm) | 9.49 (241) | 10.51 (267) | 1.02 (26) 10.8% |
| Circum. inches (mm) | 94.22 (2393.2) | 100.62 (2555.81) | 6.4 (162.61) 6.8% |
| Sidewall Height inches (mm) | 7.5 (190.39) | 8.51 (216.27) | 1.02 (25.88) 13.6% |
| Revolutions per mile (km) | 672.46 (417.85) | 629.68 (391.26) | -42.78 (-26.58) -6.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.36 mph (34.37 km/h) |
| 25 mph (40.23 km/h) | 26.7 mph (42.97 km/h) |
| 30 mph (48.28 km/h) | 32.04 mph (51.56 km/h) |
| 35 mph (56.33 km/h) | 37.38 mph (60.15 km/h) |
| 40 mph (64.37 km/h) | 42.72 mph (68.75 km/h) |
| 45 mph (72.42 km/h) | 48.06 mph (77.34 km/h) |
| 50 mph (80.47 km/h) | 53.4 mph (85.93 km/h) |
| 55 mph (88.51 km/h) | 58.74 mph (94.53 km/h) |
| 60 mph (96.56 km/h) | 64.08 mph (103.12 km/h) |
| 65 mph (104.61 km/h) | 69.42 mph (111.72 km/h) |
| 70 mph (112.65 km/h) | 74.76 mph (120.31 km/h) |
| 75 mph (120.7 km/h) | 80.1 mph (128.9 km/h) |
| 80 mph (128.75 km/h) | 85.44 mph (137.5 km/h) |
| 85 mph (136.79 km/h) | 90.78 mph (146.09 km/h) |
| 90 mph (144.84 km/h) | 96.12 mph (154.68 km/h) |
| 95 mph (152.89 km/h) | 101.45 mph (163.28 km/h) |
| 100 mph (160.93 km/h) | 106.79 mph (171.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1602 | 1862 | 2005 | 2093 | 2189 | 2257 | 2332 | 2421 | 2543 | 2666 | 2803 | 2912 | 3109 | 3328 | 3498 | 3607 | 3669 | 3894 | 4207 | 4889 |
Better Fuel Economy Factory Ratios Increased Power
