Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/75-17 | 318/52-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.74 (679.3) | 33.02 (838.72) | 6.28 (159.42) 23.5% |
| Width inches (mm) | 6.5 (165) | 12.52 (318) | 6.02 (153) 92.7% |
| Circum. inches (mm) | 84.02 (2134.08) | 103.74 (2634.92) | 19.72 (500.83) 23.5% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 6.51 (165.36) | 1.64 (41.61) 33.6% |
| Revolutions per mile (km) | 754.11 (468.58) | 610.78 (379.52) | -143.34 (-89.07) -19% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.69 mph (39.74 km/h) |
| 25 mph (40.23 km/h) | 30.87 mph (49.68 km/h) |
| 30 mph (48.28 km/h) | 37.04 mph (59.61 km/h) |
| 35 mph (56.33 km/h) | 43.21 mph (69.55 km/h) |
| 40 mph (64.37 km/h) | 49.39 mph (79.48 km/h) |
| 45 mph (72.42 km/h) | 55.56 mph (89.42 km/h) |
| 50 mph (80.47 km/h) | 61.73 mph (99.35 km/h) |
| 55 mph (88.51 km/h) | 67.91 mph (109.29 km/h) |
| 60 mph (96.56 km/h) | 74.08 mph (119.22 km/h) |
| 65 mph (104.61 km/h) | 80.25 mph (129.16 km/h) |
| 70 mph (112.65 km/h) | 86.43 mph (139.09 km/h) |
| 75 mph (120.7 km/h) | 92.6 mph (149.03 km/h) |
| 80 mph (128.75 km/h) | 98.77 mph (158.96 km/h) |
| 85 mph (136.79 km/h) | 104.95 mph (168.9 km/h) |
| 90 mph (144.84 km/h) | 111.12 mph (178.83 km/h) |
| 95 mph (152.89 km/h) | 117.29 mph (188.77 km/h) |
| 100 mph (160.93 km/h) | 123.47 mph (198.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1554 | 1806 | 1945 | 2031 | 2123 | 2189 | 2262 | 2348 | 2467 | 2586 | 2718 | 2824 | 3016 | 3228 | 3393 | 3499 | 3558 | 3777 | 4081 | 4742 |
Better Fuel Economy Factory Ratios Increased Power
