Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 25/7.5-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (636.94) | 23.01 (584.5) | -2.06 (-52.44) -8.2% |
| Width inches (mm) | 7.52 (191) | 7.28 (185) | -0.24 (-6) -3.1% |
| Circum. inches (mm) | 78.78 (2001.01) | 72.29 (1836.26) | -6.49 (-164.75) -8.2% |
| Sidewall Height inches (mm) | 5.04 (127.97) | 4.01 (101.75) | -1.03 (-26.22) -20.5% |
| Revolutions per mile (km) | 804.27 (499.75) | 876.42 (544.58) | 72.16 (44.84) 9% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.35 mph (29.54 km/h) |
| 25 mph (40.23 km/h) | 22.94 mph (36.92 km/h) |
| 30 mph (48.28 km/h) | 27.53 mph (44.31 km/h) |
| 35 mph (56.33 km/h) | 32.12 mph (51.69 km/h) |
| 40 mph (64.37 km/h) | 36.71 mph (59.07 km/h) |
| 45 mph (72.42 km/h) | 41.3 mph (66.46 km/h) |
| 50 mph (80.47 km/h) | 45.88 mph (73.84 km/h) |
| 55 mph (88.51 km/h) | 50.47 mph (81.23 km/h) |
| 60 mph (96.56 km/h) | 55.06 mph (88.61 km/h) |
| 65 mph (104.61 km/h) | 59.65 mph (96 km/h) |
| 70 mph (112.65 km/h) | 64.24 mph (103.38 km/h) |
| 75 mph (120.7 km/h) | 68.83 mph (110.76 km/h) |
| 80 mph (128.75 km/h) | 73.41 mph (118.15 km/h) |
| 85 mph (136.79 km/h) | 78 mph (125.53 km/h) |
| 90 mph (144.84 km/h) | 82.59 mph (132.92 km/h) |
| 95 mph (152.89 km/h) | 87.18 mph (140.3 km/h) |
| 100 mph (160.93 km/h) | 91.77 mph (147.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2230 | 2591 | 2790 | 2914 | 3047 | 3141 | 3246 | 3369 | 3540 | 3711 | 3901 | 4053 | 4328 | 4631 | 4869 | 5021 | 5106 | 5419 | 5856 | 6805 |
Better Fuel Economy Factory Ratios Increased Power
