Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/85-18 | 220/95-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.37 (720.7) | 34.46 (875.2) | 6.08 (154.5) 21.4% |
| Width inches (mm) | 6.1 (155) | 8.66 (220) | 2.56 (65) 41.9% |
| Circum. inches (mm) | 89.14 (2264.15) | 108.25 (2749.52) | 19.11 (485.38) 21.4% |
| Sidewall Height inches (mm) | 5.19 (131.75) | 8.23 (209) | 3.04 (77.25) 58.6% |
| Revolutions per mile (km) | 710.8 (441.67) | 585.32 (363.7) | -125.48 (-77.97) -17.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.29 mph (39.09 km/h) |
| 25 mph (40.23 km/h) | 30.36 mph (48.86 km/h) |
| 30 mph (48.28 km/h) | 36.43 mph (58.63 km/h) |
| 35 mph (56.33 km/h) | 42.5 mph (68.4 km/h) |
| 40 mph (64.37 km/h) | 48.57 mph (78.17 km/h) |
| 45 mph (72.42 km/h) | 54.65 mph (87.95 km/h) |
| 50 mph (80.47 km/h) | 60.72 mph (97.72 km/h) |
| 55 mph (88.51 km/h) | 66.79 mph (107.49 km/h) |
| 60 mph (96.56 km/h) | 72.86 mph (117.26 km/h) |
| 65 mph (104.61 km/h) | 78.93 mph (127.03 km/h) |
| 70 mph (112.65 km/h) | 85.01 mph (136.8 km/h) |
| 75 mph (120.7 km/h) | 91.08 mph (146.58 km/h) |
| 80 mph (128.75 km/h) | 97.15 mph (156.35 km/h) |
| 85 mph (136.79 km/h) | 103.22 mph (166.12 km/h) |
| 90 mph (144.84 km/h) | 109.29 mph (175.89 km/h) |
| 95 mph (152.89 km/h) | 115.37 mph (185.66 km/h) |
| 100 mph (160.93 km/h) | 121.44 mph (195.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1490 | 1730 | 1863 | 1946 | 2035 | 2098 | 2168 | 2250 | 2364 | 2478 | 2605 | 2706 | 2890 | 3093 | 3252 | 3353 | 3410 | 3619 | 3911 | 4545 |
Better Fuel Economy Factory Ratios Increased Power
