Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-16 | 31/8-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.15 (587.9) | 31.03 (788.04) | 7.88 (200.14) 34% |
| Width inches (mm) | 6.5 (165) | 7.99 (203) | 1.5 (38) 23% |
| Circum. inches (mm) | 72.71 (1846.94) | 97.47 (2475.7) | 24.75 (628.76) 34% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 7.51 (190.82) | 3.94 (100.07) 110.3% |
| Revolutions per mile (km) | 871.36 (541.43) | 650.06 (403.93) | -221.3 (-137.51) -25.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.81 mph (43.14 km/h) |
| 25 mph (40.23 km/h) | 33.51 mph (53.93 km/h) |
| 30 mph (48.28 km/h) | 40.21 mph (64.72 km/h) |
| 35 mph (56.33 km/h) | 46.92 mph (75.5 km/h) |
| 40 mph (64.37 km/h) | 53.62 mph (86.29 km/h) |
| 45 mph (72.42 km/h) | 60.32 mph (97.07 km/h) |
| 50 mph (80.47 km/h) | 67.02 mph (107.86 km/h) |
| 55 mph (88.51 km/h) | 73.72 mph (118.65 km/h) |
| 60 mph (96.56 km/h) | 80.43 mph (129.43 km/h) |
| 65 mph (104.61 km/h) | 87.13 mph (140.22 km/h) |
| 70 mph (112.65 km/h) | 93.83 mph (151.01 km/h) |
| 75 mph (120.7 km/h) | 100.53 mph (161.79 km/h) |
| 80 mph (128.75 km/h) | 107.23 mph (172.58 km/h) |
| 85 mph (136.79 km/h) | 113.94 mph (183.36 km/h) |
| 90 mph (144.84 km/h) | 120.64 mph (194.15 km/h) |
| 95 mph (152.89 km/h) | 127.34 mph (204.94 km/h) |
| 100 mph (160.93 km/h) | 134.04 mph (215.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1654 | 1922 | 2070 | 2161 | 2260 | 2330 | 2407 | 2499 | 2626 | 2752 | 2893 | 3006 | 3210 | 3435 | 3611 | 3724 | 3787 | 4020 | 4343 | 5047 |
Better Fuel Economy Factory Ratios Increased Power
