Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/85-18 | 165/85-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.37 (720.7) | 28.04 (712.3) | -0.33 (-8.4) -1.2% |
| Width inches (mm) | 6.1 (155) | 6.5 (165) | 0.39 (10) 6.5% |
| Circum. inches (mm) | 89.14 (2264.15) | 88.1 (2237.76) | -1.04 (-26.39) -1.2% |
| Sidewall Height inches (mm) | 5.19 (131.75) | 5.52 (140.25) | 0.33 (8.5) 6.5% |
| Revolutions per mile (km) | 710.8 (441.67) | 719.18 (446.88) | 8.38 (5.21) 1.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.81 km/h) |
| 25 mph (40.23 km/h) | 24.71 mph (39.76 km/h) |
| 30 mph (48.28 km/h) | 29.65 mph (47.72 km/h) |
| 35 mph (56.33 km/h) | 34.59 mph (55.67 km/h) |
| 40 mph (64.37 km/h) | 39.53 mph (63.62 km/h) |
| 45 mph (72.42 km/h) | 44.48 mph (71.58 km/h) |
| 50 mph (80.47 km/h) | 49.42 mph (79.53 km/h) |
| 55 mph (88.51 km/h) | 54.36 mph (87.48 km/h) |
| 60 mph (96.56 km/h) | 59.3 mph (95.44 km/h) |
| 65 mph (104.61 km/h) | 64.24 mph (103.39 km/h) |
| 70 mph (112.65 km/h) | 69.18 mph (111.34 km/h) |
| 75 mph (120.7 km/h) | 74.13 mph (119.29 km/h) |
| 80 mph (128.75 km/h) | 79.07 mph (127.25 km/h) |
| 85 mph (136.79 km/h) | 84.01 mph (135.2 km/h) |
| 90 mph (144.84 km/h) | 88.95 mph (143.15 km/h) |
| 95 mph (152.89 km/h) | 93.89 mph (151.11 km/h) |
| 100 mph (160.93 km/h) | 98.83 mph (159.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1830 | 2126 | 2290 | 2391 | 2500 | 2578 | 2663 | 2765 | 2905 | 3045 | 3201 | 3325 | 3551 | 3801 | 3995 | 4120 | 4190 | 4447 | 4805 | 5584 |
Better Fuel Economy Factory Ratios Increased Power
