Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/85-18 | 225/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.37 (720.7) | 33.06 (839.7) | 4.69 (119) 16.5% |
| Width inches (mm) | 6.1 (155) | 8.86 (225) | 2.76 (70) 45.2% |
| Circum. inches (mm) | 89.14 (2264.15) | 103.86 (2638) | 14.72 (373.85) 16.5% |
| Sidewall Height inches (mm) | 5.19 (131.75) | 7.53 (191.25) | 2.34 (59.5) 45.2% |
| Revolutions per mile (km) | 710.8 (441.67) | 610.06 (379.07) | -100.73 (-62.59) -14.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.3 mph (37.5 km/h) |
| 25 mph (40.23 km/h) | 29.13 mph (46.88 km/h) |
| 30 mph (48.28 km/h) | 34.95 mph (56.25 km/h) |
| 35 mph (56.33 km/h) | 40.78 mph (65.63 km/h) |
| 40 mph (64.37 km/h) | 46.6 mph (75 km/h) |
| 45 mph (72.42 km/h) | 52.43 mph (84.38 km/h) |
| 50 mph (80.47 km/h) | 58.26 mph (93.75 km/h) |
| 55 mph (88.51 km/h) | 64.08 mph (103.13 km/h) |
| 60 mph (96.56 km/h) | 69.91 mph (112.5 km/h) |
| 65 mph (104.61 km/h) | 75.73 mph (121.88 km/h) |
| 70 mph (112.65 km/h) | 81.56 mph (131.26 km/h) |
| 75 mph (120.7 km/h) | 87.38 mph (140.63 km/h) |
| 80 mph (128.75 km/h) | 93.21 mph (150.01 km/h) |
| 85 mph (136.79 km/h) | 99.03 mph (159.38 km/h) |
| 90 mph (144.84 km/h) | 104.86 mph (168.76 km/h) |
| 95 mph (152.89 km/h) | 110.69 mph (178.13 km/h) |
| 100 mph (160.93 km/h) | 116.51 mph (187.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1552 | 1804 | 1942 | 2028 | 2121 | 2187 | 2259 | 2345 | 2464 | 2583 | 2715 | 2821 | 3012 | 3224 | 3389 | 3495 | 3554 | 3772 | 4076 | 4737 |
Better Fuel Economy Factory Ratios Increased Power
