Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 155/66-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 23.06 (585.6) | 1.34 (34.1) 6.2% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 68.21 (1732.59) | 72.43 (1839.72) | 4.22 (107.13) 6.2% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 4.03 (102.3) | 0.67 (17.05) 20% |
| Revolutions per mile (km) | 928.87 (577.17) | 874.78 (543.56) | -54.09 (-33.61) -5.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.24 mph (34.18 km/h) |
| 25 mph (40.23 km/h) | 26.55 mph (42.72 km/h) |
| 30 mph (48.28 km/h) | 31.85 mph (51.27 km/h) |
| 35 mph (56.33 km/h) | 37.16 mph (59.81 km/h) |
| 40 mph (64.37 km/h) | 42.47 mph (68.35 km/h) |
| 45 mph (72.42 km/h) | 47.78 mph (76.9 km/h) |
| 50 mph (80.47 km/h) | 53.09 mph (85.44 km/h) |
| 55 mph (88.51 km/h) | 58.4 mph (93.99 km/h) |
| 60 mph (96.56 km/h) | 63.71 mph (102.53 km/h) |
| 65 mph (104.61 km/h) | 69.02 mph (111.08 km/h) |
| 70 mph (112.65 km/h) | 74.33 mph (119.62 km/h) |
| 75 mph (120.7 km/h) | 79.64 mph (128.16 km/h) |
| 80 mph (128.75 km/h) | 84.95 mph (136.71 km/h) |
| 85 mph (136.79 km/h) | 90.26 mph (145.25 km/h) |
| 90 mph (144.84 km/h) | 95.56 mph (153.8 km/h) |
| 95 mph (152.89 km/h) | 100.87 mph (162.34 km/h) |
| 100 mph (160.93 km/h) | 106.18 mph (170.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2226 | 2586 | 2785 | 2908 | 3041 | 3136 | 3240 | 3363 | 3533 | 3704 | 3893 | 4045 | 4320 | 4623 | 4860 | 5011 | 5096 | 5409 | 5845 | 6792 |
Better Fuel Economy Factory Ratios Increased Power
