Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-17 | 236/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.54 (648.8) | 29.15 (740.4) | 3.61 (91.6) 14.1% |
| Width inches (mm) | 6.1 (155) | 9.29 (236) | 3.19 (81) 52.3% |
| Circum. inches (mm) | 80.25 (2038.27) | 91.58 (2326.04) | 11.33 (287.77) 14.1% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 5.57 (141.6) | 1.3 (33.1) 30.5% |
| Revolutions per mile (km) | 789.57 (490.61) | 691.88 (429.92) | -97.68 (-60.7) -12.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.82 mph (36.73 km/h) |
| 25 mph (40.23 km/h) | 28.53 mph (45.91 km/h) |
| 30 mph (48.28 km/h) | 34.24 mph (55.1 km/h) |
| 35 mph (56.33 km/h) | 39.94 mph (64.28 km/h) |
| 40 mph (64.37 km/h) | 45.65 mph (73.46 km/h) |
| 45 mph (72.42 km/h) | 51.35 mph (82.65 km/h) |
| 50 mph (80.47 km/h) | 57.06 mph (91.83 km/h) |
| 55 mph (88.51 km/h) | 62.77 mph (101.01 km/h) |
| 60 mph (96.56 km/h) | 68.47 mph (110.19 km/h) |
| 65 mph (104.61 km/h) | 74.18 mph (119.38 km/h) |
| 70 mph (112.65 km/h) | 79.88 mph (128.56 km/h) |
| 75 mph (120.7 km/h) | 85.59 mph (137.74 km/h) |
| 80 mph (128.75 km/h) | 91.29 mph (146.92 km/h) |
| 85 mph (136.79 km/h) | 97 mph (156.11 km/h) |
| 90 mph (144.84 km/h) | 102.71 mph (165.29 km/h) |
| 95 mph (152.89 km/h) | 108.41 mph (174.47 km/h) |
| 100 mph (160.93 km/h) | 114.12 mph (183.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1761 | 2045 | 2203 | 2300 | 2405 | 2480 | 2562 | 2660 | 2795 | 2930 | 3079 | 3199 | 3417 | 3656 | 3844 | 3963 | 4031 | 4278 | 4623 | 5372 |
Better Fuel Economy Factory Ratios Increased Power
