Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/50-15 | 175/30-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.89 (556) | 19.13 (486) | -2.76 (-70) -12.6% |
| Width inches (mm) | 6.89 (175) | 6.89 (175) | 0 (0) 0% |
| Circum. inches (mm) | 68.77 (1746.73) | 60.11 (1526.81) | -8.66 (-219.91) -12.6% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 2.07 (52.5) | -1.38 (-35) -40% |
| Revolutions per mile (km) | 921.35 (572.5) | 1054.05 (654.96) | 132.7 (82.46) 14.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.48 mph (28.13 km/h) |
| 25 mph (40.23 km/h) | 21.85 mph (35.17 km/h) |
| 30 mph (48.28 km/h) | 26.22 mph (42.2 km/h) |
| 35 mph (56.33 km/h) | 30.59 mph (49.24 km/h) |
| 40 mph (64.37 km/h) | 34.96 mph (56.27 km/h) |
| 45 mph (72.42 km/h) | 39.33 mph (63.3 km/h) |
| 50 mph (80.47 km/h) | 43.71 mph (70.34 km/h) |
| 55 mph (88.51 km/h) | 48.08 mph (77.37 km/h) |
| 60 mph (96.56 km/h) | 52.45 mph (84.4 km/h) |
| 65 mph (104.61 km/h) | 56.82 mph (91.44 km/h) |
| 70 mph (112.65 km/h) | 61.19 mph (98.47 km/h) |
| 75 mph (120.7 km/h) | 65.56 mph (105.5 km/h) |
| 80 mph (128.75 km/h) | 69.93 mph (112.54 km/h) |
| 85 mph (136.79 km/h) | 74.3 mph (119.57 km/h) |
| 90 mph (144.84 km/h) | 78.67 mph (126.61 km/h) |
| 95 mph (152.89 km/h) | 83.04 mph (133.64 km/h) |
| 100 mph (160.93 km/h) | 87.41 mph (140.67 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
