Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-15 | 32/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.86 (606) | 32.03 (813.48) | 8.17 (207.48) 34.2% |
| Width inches (mm) | 4.92 (125) | 12.52 (318) | 7.6 (193) 154.4% |
| Circum. inches (mm) | 74.95 (1903.81) | 100.62 (2555.62) | 25.66 (651.82) 34.2% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 8.51 (216.24) | 4.08 (103.74) 92.2% |
| Revolutions per mile (km) | 845.33 (525.26) | 629.73 (391.29) | -215.6 (-133.97) -25.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.85 mph (43.21 km/h) |
| 25 mph (40.23 km/h) | 33.56 mph (54.01 km/h) |
| 30 mph (48.28 km/h) | 40.27 mph (64.81 km/h) |
| 35 mph (56.33 km/h) | 46.98 mph (75.61 km/h) |
| 40 mph (64.37 km/h) | 53.7 mph (86.41 km/h) |
| 45 mph (72.42 km/h) | 60.41 mph (97.22 km/h) |
| 50 mph (80.47 km/h) | 67.12 mph (108.02 km/h) |
| 55 mph (88.51 km/h) | 73.83 mph (118.82 km/h) |
| 60 mph (96.56 km/h) | 80.54 mph (129.62 km/h) |
| 65 mph (104.61 km/h) | 87.25 mph (140.42 km/h) |
| 70 mph (112.65 km/h) | 93.97 mph (151.22 km/h) |
| 75 mph (120.7 km/h) | 100.68 mph (162.03 km/h) |
| 80 mph (128.75 km/h) | 107.39 mph (172.83 km/h) |
| 85 mph (136.79 km/h) | 114.1 mph (183.63 km/h) |
| 90 mph (144.84 km/h) | 120.81 mph (194.43 km/h) |
| 95 mph (152.89 km/h) | 127.53 mph (205.23 km/h) |
| 100 mph (160.93 km/h) | 134.24 mph (216.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1603 | 1862 | 2005 | 2094 | 2189 | 2257 | 2332 | 2421 | 2544 | 2666 | 2803 | 2912 | 3110 | 3328 | 3498 | 3607 | 3669 | 3894 | 4208 | 4889 |
Better Fuel Economy Factory Ratios Increased Power
