Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-13 | 155/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.76 (578.2) | 28.98 (736.2) | 6.22 (158) 27.3% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 71.51 (1816.47) | 91.06 (2312.84) | 19.54 (496.37) 27.3% |
| Sidewall Height inches (mm) | 4.88 (124) | 5.49 (139.5) | 0.61 (15.5) 12.5% |
| Revolutions per mile (km) | 885.97 (550.52) | 695.83 (432.37) | -190.14 (-118.15) -21.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.47 mph (40.98 km/h) |
| 25 mph (40.23 km/h) | 31.83 mph (51.23 km/h) |
| 30 mph (48.28 km/h) | 38.2 mph (61.47 km/h) |
| 35 mph (56.33 km/h) | 44.56 mph (71.72 km/h) |
| 40 mph (64.37 km/h) | 50.93 mph (81.96 km/h) |
| 45 mph (72.42 km/h) | 57.3 mph (92.21 km/h) |
| 50 mph (80.47 km/h) | 63.66 mph (102.46 km/h) |
| 55 mph (88.51 km/h) | 70.03 mph (112.7 km/h) |
| 60 mph (96.56 km/h) | 76.4 mph (122.95 km/h) |
| 65 mph (104.61 km/h) | 82.76 mph (133.19 km/h) |
| 70 mph (112.65 km/h) | 89.13 mph (143.44 km/h) |
| 75 mph (120.7 km/h) | 95.49 mph (153.68 km/h) |
| 80 mph (128.75 km/h) | 101.86 mph (163.93 km/h) |
| 85 mph (136.79 km/h) | 108.23 mph (174.18 km/h) |
| 90 mph (144.84 km/h) | 114.59 mph (184.42 km/h) |
| 95 mph (152.89 km/h) | 120.96 mph (194.67 km/h) |
| 100 mph (160.93 km/h) | 127.33 mph (204.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1771 | 2057 | 2215 | 2313 | 2419 | 2494 | 2577 | 2675 | 2811 | 2946 | 3097 | 3217 | 3436 | 3677 | 3866 | 3986 | 4054 | 4303 | 4649 | 5403 |
Better Fuel Economy Factory Ratios Increased Power
