Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/65-15 | 155/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.93 (582.5) | 25.93 (658.7) | 3 (76.2) 13.1% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 72.05 (1829.98) | 81.47 (2069.37) | 9.42 (239.39) 13.1% |
| Sidewall Height inches (mm) | 3.97 (100.75) | 3.97 (100.75) | 0 (0) 0% |
| Revolutions per mile (km) | 879.43 (546.45) | 777.7 (483.24) | -101.74 (-63.22) -11.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.62 mph (36.4 km/h) |
| 25 mph (40.23 km/h) | 28.27 mph (45.5 km/h) |
| 30 mph (48.28 km/h) | 33.92 mph (54.6 km/h) |
| 35 mph (56.33 km/h) | 39.58 mph (63.7 km/h) |
| 40 mph (64.37 km/h) | 45.23 mph (72.79 km/h) |
| 45 mph (72.42 km/h) | 50.89 mph (81.89 km/h) |
| 50 mph (80.47 km/h) | 56.54 mph (90.99 km/h) |
| 55 mph (88.51 km/h) | 62.19 mph (100.09 km/h) |
| 60 mph (96.56 km/h) | 67.85 mph (109.19 km/h) |
| 65 mph (104.61 km/h) | 73.5 mph (118.29 km/h) |
| 70 mph (112.65 km/h) | 79.16 mph (127.39 km/h) |
| 75 mph (120.7 km/h) | 84.81 mph (136.49 km/h) |
| 80 mph (128.75 km/h) | 90.47 mph (145.59 km/h) |
| 85 mph (136.79 km/h) | 96.12 mph (154.69 km/h) |
| 90 mph (144.84 km/h) | 101.77 mph (163.79 km/h) |
| 95 mph (152.89 km/h) | 107.43 mph (172.89 km/h) |
| 100 mph (160.93 km/h) | 113.08 mph (181.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1979 | 2299 | 2476 | 2585 | 2703 | 2788 | 2880 | 2990 | 3141 | 3293 | 3461 | 3596 | 3840 | 4110 | 4320 | 4455 | 4531 | 4809 | 5196 | 6038 |
Better Fuel Economy Factory Ratios Increased Power
