Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/25-19 | 305/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25 (635.1) | 24.61 (625) | -0.4 (-10.1) -1.6% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 78.55 (1995.23) | 77.3 (1963.5) | -1.25 (-31.73) -1.6% |
| Sidewall Height inches (mm) | 3 (76.25) | 4.8 (122) | 1.8 (45.75) 60% |
| Revolutions per mile (km) | 806.6 (501.2) | 819.63 (509.29) | 13.03 (8.1) 1.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.68 mph (31.68 km/h) |
| 25 mph (40.23 km/h) | 24.6 mph (39.59 km/h) |
| 30 mph (48.28 km/h) | 29.52 mph (47.51 km/h) |
| 35 mph (56.33 km/h) | 34.44 mph (55.43 km/h) |
| 40 mph (64.37 km/h) | 39.36 mph (63.35 km/h) |
| 45 mph (72.42 km/h) | 44.28 mph (71.27 km/h) |
| 50 mph (80.47 km/h) | 49.2 mph (79.19 km/h) |
| 55 mph (88.51 km/h) | 54.13 mph (87.11 km/h) |
| 60 mph (96.56 km/h) | 59.05 mph (95.03 km/h) |
| 65 mph (104.61 km/h) | 63.97 mph (102.94 km/h) |
| 70 mph (112.65 km/h) | 68.89 mph (110.86 km/h) |
| 75 mph (120.7 km/h) | 73.81 mph (118.78 km/h) |
| 80 mph (128.75 km/h) | 78.73 mph (126.7 km/h) |
| 85 mph (136.79 km/h) | 83.65 mph (134.62 km/h) |
| 90 mph (144.84 km/h) | 88.57 mph (142.54 km/h) |
| 95 mph (152.89 km/h) | 93.49 mph (150.46 km/h) |
| 100 mph (160.93 km/h) | 98.41 mph (158.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2086 | 2423 | 2609 | 2725 | 2849 | 2938 | 3036 | 3151 | 3311 | 3470 | 3648 | 3790 | 4047 | 4331 | 4553 | 4695 | 4775 | 5068 | 5476 | 6364 |
Better Fuel Economy Factory Ratios Increased Power
