Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 155/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 19.88 (505) | -1.83 (-46.5) -8.4% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 68.21 (1732.59) | 62.46 (1586.5) | -5.75 (-146.08) -8.4% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 2.44 (62) | -0.92 (-23.25) -27.3% |
| Revolutions per mile (km) | 928.87 (577.17) | 1014.4 (630.32) | 85.53 (53.15) 9.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.31 mph (29.47 km/h) |
| 25 mph (40.23 km/h) | 22.89 mph (36.84 km/h) |
| 30 mph (48.28 km/h) | 27.47 mph (44.21 km/h) |
| 35 mph (56.33 km/h) | 32.05 mph (51.58 km/h) |
| 40 mph (64.37 km/h) | 36.63 mph (58.95 km/h) |
| 45 mph (72.42 km/h) | 41.21 mph (66.31 km/h) |
| 50 mph (80.47 km/h) | 45.78 mph (73.68 km/h) |
| 55 mph (88.51 km/h) | 50.36 mph (81.05 km/h) |
| 60 mph (96.56 km/h) | 54.94 mph (88.42 km/h) |
| 65 mph (104.61 km/h) | 59.52 mph (95.79 km/h) |
| 70 mph (112.65 km/h) | 64.1 mph (103.16 km/h) |
| 75 mph (120.7 km/h) | 68.68 mph (110.52 km/h) |
| 80 mph (128.75 km/h) | 73.25 mph (117.89 km/h) |
| 85 mph (136.79 km/h) | 77.83 mph (125.26 km/h) |
| 90 mph (144.84 km/h) | 82.41 mph (132.63 km/h) |
| 95 mph (152.89 km/h) | 86.99 mph (140 km/h) |
| 100 mph (160.93 km/h) | 91.57 mph (147.37 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
