Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 305/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 27.01 (686) | -3.35 (-85) -11% |
| Width inches (mm) | 12.8 (325) | 12.01 (305) | -0.79 (-20) -6.2% |
| Circum. inches (mm) | 95.36 (2422.17) | 84.85 (2155.13) | -10.51 (-267.04) -11% |
| Sidewall Height inches (mm) | 7.68 (195) | 6 (152.5) | -1.67 (-42.5) -21.8% |
| Revolutions per mile (km) | 664.42 (412.85) | 746.75 (464.01) | 82.33 (51.16) 12.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.8 mph (28.64 km/h) |
| 25 mph (40.23 km/h) | 22.24 mph (35.8 km/h) |
| 30 mph (48.28 km/h) | 26.69 mph (42.96 km/h) |
| 35 mph (56.33 km/h) | 31.14 mph (50.12 km/h) |
| 40 mph (64.37 km/h) | 35.59 mph (57.28 km/h) |
| 45 mph (72.42 km/h) | 40.04 mph (64.44 km/h) |
| 50 mph (80.47 km/h) | 44.49 mph (71.6 km/h) |
| 55 mph (88.51 km/h) | 48.94 mph (78.76 km/h) |
| 60 mph (96.56 km/h) | 53.39 mph (85.92 km/h) |
| 65 mph (104.61 km/h) | 57.83 mph (93.07 km/h) |
| 70 mph (112.65 km/h) | 62.28 mph (100.23 km/h) |
| 75 mph (120.7 km/h) | 66.73 mph (107.39 km/h) |
| 80 mph (128.75 km/h) | 71.18 mph (114.55 km/h) |
| 85 mph (136.79 km/h) | 75.63 mph (121.71 km/h) |
| 90 mph (144.84 km/h) | 80.08 mph (128.87 km/h) |
| 95 mph (152.89 km/h) | 84.53 mph (136.03 km/h) |
| 100 mph (160.93 km/h) | 88.98 mph (143.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1900 | 2208 | 2377 | 2483 | 2596 | 2677 | 2766 | 2871 | 3016 | 3162 | 3324 | 3453 | 3687 | 3946 | 4148 | 4278 | 4351 | 4617 | 4989 | 5798 |
Better Fuel Economy Factory Ratios Increased Power
