Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-16 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.52 (698.9) | 24.47 (621.5) | -3.05 (-77.4) -11.1% |
| Width inches (mm) | 8.86 (225) | 7.28 (185) | -1.57 (-40) -17.8% |
| Circum. inches (mm) | 86.44 (2195.66) | 76.87 (1952.5) | -9.57 (-243.16) -11.1% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 4.73 (120.25) | -1.02 (-26) -17.8% |
| Revolutions per mile (km) | 732.97 (455.44) | 824.25 (512.16) | 91.28 (56.72) 12.5% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.79 mph (28.62 km/h) |
| 25 mph (40.23 km/h) | 22.23 mph (35.78 km/h) |
| 30 mph (48.28 km/h) | 26.68 mph (42.93 km/h) |
| 35 mph (56.33 km/h) | 31.12 mph (50.09 km/h) |
| 40 mph (64.37 km/h) | 35.57 mph (57.24 km/h) |
| 45 mph (72.42 km/h) | 40.02 mph (64.4 km/h) |
| 50 mph (80.47 km/h) | 44.46 mph (71.56 km/h) |
| 55 mph (88.51 km/h) | 48.91 mph (78.71 km/h) |
| 60 mph (96.56 km/h) | 53.36 mph (85.87 km/h) |
| 65 mph (104.61 km/h) | 57.8 mph (93.02 km/h) |
| 70 mph (112.65 km/h) | 62.25 mph (100.18 km/h) |
| 75 mph (120.7 km/h) | 66.69 mph (107.33 km/h) |
| 80 mph (128.75 km/h) | 71.14 mph (114.49 km/h) |
| 85 mph (136.79 km/h) | 75.59 mph (121.65 km/h) |
| 90 mph (144.84 km/h) | 80.03 mph (128.8 km/h) |
| 95 mph (152.89 km/h) | 84.48 mph (135.96 km/h) |
| 100 mph (160.93 km/h) | 88.93 mph (143.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2098 | 2437 | 2624 | 2740 | 2865 | 2954 | 3053 | 3169 | 3329 | 3490 | 3668 | 3811 | 4070 | 4356 | 4579 | 4722 | 4802 | 5097 | 5507 | 6400 |
Better Fuel Economy Factory Ratios Increased Power
