Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-15 | 185/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.86 (606) | 26.65 (677) | 2.8 (71) 11.7% |
| Width inches (mm) | 4.92 (125) | 7.28 (185) | 2.36 (60) 48% |
| Circum. inches (mm) | 74.95 (1903.81) | 83.73 (2126.86) | 8.78 (223.05) 11.7% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 5.83 (148) | 1.4 (35.5) 31.6% |
| Revolutions per mile (km) | 845.33 (525.26) | 756.68 (470.18) | -88.65 (-55.09) -10.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.34 mph (35.96 km/h) |
| 25 mph (40.23 km/h) | 27.93 mph (44.95 km/h) |
| 30 mph (48.28 km/h) | 33.51 mph (53.94 km/h) |
| 35 mph (56.33 km/h) | 39.1 mph (62.93 km/h) |
| 40 mph (64.37 km/h) | 44.69 mph (71.92 km/h) |
| 45 mph (72.42 km/h) | 50.27 mph (80.91 km/h) |
| 50 mph (80.47 km/h) | 55.86 mph (89.9 km/h) |
| 55 mph (88.51 km/h) | 61.44 mph (98.88 km/h) |
| 60 mph (96.56 km/h) | 67.03 mph (107.87 km/h) |
| 65 mph (104.61 km/h) | 72.62 mph (116.86 km/h) |
| 70 mph (112.65 km/h) | 78.2 mph (125.85 km/h) |
| 75 mph (120.7 km/h) | 83.79 mph (134.84 km/h) |
| 80 mph (128.75 km/h) | 89.37 mph (143.83 km/h) |
| 85 mph (136.79 km/h) | 94.96 mph (152.82 km/h) |
| 90 mph (144.84 km/h) | 100.54 mph (161.81 km/h) |
| 95 mph (152.89 km/h) | 106.13 mph (170.8 km/h) |
| 100 mph (160.93 km/h) | 111.72 mph (179.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1926 | 2237 | 2409 | 2516 | 2630 | 2712 | 2802 | 2909 | 3056 | 3204 | 3368 | 3499 | 3736 | 3999 | 4204 | 4335 | 4408 | 4679 | 5056 | 5875 |
Better Fuel Economy Factory Ratios Increased Power
