Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/75-17 | 185/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.7 (754.3) | 26.47 (672.3) | -3.23 (-82) -10.9% |
| Width inches (mm) | 8.46 (215) | 7.28 (185) | -1.18 (-30) -14% |
| Circum. inches (mm) | 93.3 (2369.7) | 83.15 (2112.09) | -10.14 (-257.61) -10.9% |
| Sidewall Height inches (mm) | 6.35 (161.25) | 4.73 (120.25) | -1.61 (-41) -25.4% |
| Revolutions per mile (km) | 679.13 (421.99) | 761.97 (473.46) | 82.83 (51.47) 12.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.83 mph (28.69 km/h) |
| 25 mph (40.23 km/h) | 22.28 mph (35.86 km/h) |
| 30 mph (48.28 km/h) | 26.74 mph (43.03 km/h) |
| 35 mph (56.33 km/h) | 31.2 mph (50.2 km/h) |
| 40 mph (64.37 km/h) | 35.65 mph (57.38 km/h) |
| 45 mph (72.42 km/h) | 40.11 mph (64.55 km/h) |
| 50 mph (80.47 km/h) | 44.56 mph (71.72 km/h) |
| 55 mph (88.51 km/h) | 49.02 mph (78.89 km/h) |
| 60 mph (96.56 km/h) | 53.48 mph (86.06 km/h) |
| 65 mph (104.61 km/h) | 57.93 mph (93.24 km/h) |
| 70 mph (112.65 km/h) | 62.39 mph (100.41 km/h) |
| 75 mph (120.7 km/h) | 66.85 mph (107.58 km/h) |
| 80 mph (128.75 km/h) | 71.3 mph (114.75 km/h) |
| 85 mph (136.79 km/h) | 75.76 mph (121.92 km/h) |
| 90 mph (144.84 km/h) | 80.22 mph (129.1 km/h) |
| 95 mph (152.89 km/h) | 84.67 mph (136.27 km/h) |
| 100 mph (160.93 km/h) | 89.13 mph (143.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1939 | 2253 | 2426 | 2533 | 2649 | 2731 | 2822 | 2929 | 3078 | 3226 | 3391 | 3523 | 3763 | 4027 | 4233 | 4365 | 4439 | 4712 | 5091 | 5916 |
Better Fuel Economy Factory Ratios Increased Power
