Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/50-15 | 165/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.5 (546) | 20.2 (513) | -1.3 (-33) -6% |
| Width inches (mm) | 6.5 (165) | 6.5 (165) | 0 (0) 0% |
| Circum. inches (mm) | 67.53 (1715.31) | 63.45 (1611.64) | -4.08 (-103.67) -6% |
| Sidewall Height inches (mm) | 3.25 (82.5) | 2.6 (66) | -0.65 (-16.5) -20% |
| Revolutions per mile (km) | 938.22 (582.98) | 998.58 (620.49) | 60.35 (37.5) 6.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.79 mph (30.24 km/h) |
| 25 mph (40.23 km/h) | 23.49 mph (37.8 km/h) |
| 30 mph (48.28 km/h) | 28.19 mph (45.36 km/h) |
| 35 mph (56.33 km/h) | 32.88 mph (52.92 km/h) |
| 40 mph (64.37 km/h) | 37.58 mph (60.48 km/h) |
| 45 mph (72.42 km/h) | 42.28 mph (68.04 km/h) |
| 50 mph (80.47 km/h) | 46.98 mph (75.6 km/h) |
| 55 mph (88.51 km/h) | 51.68 mph (83.16 km/h) |
| 60 mph (96.56 km/h) | 56.37 mph (90.72 km/h) |
| 65 mph (104.61 km/h) | 61.07 mph (98.29 km/h) |
| 70 mph (112.65 km/h) | 65.77 mph (105.85 km/h) |
| 75 mph (120.7 km/h) | 70.47 mph (113.41 km/h) |
| 80 mph (128.75 km/h) | 75.16 mph (120.97 km/h) |
| 85 mph (136.79 km/h) | 79.86 mph (128.53 km/h) |
| 90 mph (144.84 km/h) | 84.56 mph (136.09 km/h) |
| 95 mph (152.89 km/h) | 89.26 mph (143.65 km/h) |
| 100 mph (160.93 km/h) | 93.96 mph (151.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
