Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 32.59 (827.7) | 3.07 (78) 10.4% |
| Width inches (mm) | 8.86 (225) | 11.22 (285) | 2.36 (60) 26.7% |
| Circum. inches (mm) | 92.73 (2355.25) | 102.37 (2600.3) | 9.65 (245.04) 10.4% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 7.29 (185.25) | 1.54 (39) 26.7% |
| Revolutions per mile (km) | 683.3 (424.58) | 618.91 (384.57) | -64.39 (-40.01) -9.4% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.08 mph (35.54 km/h) |
| 25 mph (40.23 km/h) | 27.6 mph (44.42 km/h) |
| 30 mph (48.28 km/h) | 33.12 mph (53.3 km/h) |
| 35 mph (56.33 km/h) | 38.64 mph (62.19 km/h) |
| 40 mph (64.37 km/h) | 44.16 mph (71.07 km/h) |
| 45 mph (72.42 km/h) | 49.68 mph (79.96 km/h) |
| 50 mph (80.47 km/h) | 55.2 mph (88.84 km/h) |
| 55 mph (88.51 km/h) | 60.72 mph (97.72 km/h) |
| 60 mph (96.56 km/h) | 66.24 mph (106.61 km/h) |
| 65 mph (104.61 km/h) | 71.76 mph (115.49 km/h) |
| 70 mph (112.65 km/h) | 77.28 mph (124.38 km/h) |
| 75 mph (120.7 km/h) | 82.8 mph (133.26 km/h) |
| 80 mph (128.75 km/h) | 88.32 mph (142.14 km/h) |
| 85 mph (136.79 km/h) | 93.84 mph (151.03 km/h) |
| 90 mph (144.84 km/h) | 99.36 mph (159.91 km/h) |
| 95 mph (152.89 km/h) | 104.88 mph (168.79 km/h) |
| 100 mph (160.93 km/h) | 110.4 mph (177.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1575 | 1830 | 1970 | 2058 | 2151 | 2218 | 2292 | 2379 | 2500 | 2621 | 2755 | 2862 | 3056 | 3271 | 3438 | 3545 | 3606 | 3827 | 4135 | 4805 |
Better Fuel Economy Factory Ratios Increased Power
