Lunasee is please to offer one wheel kits suitable for installation on the front wheel of a trike, including Gold Wing and Harley. Since there is no frame or fork adjacent to the rear wheels, there is not convenient location for mounting the LEDs on the rear wheels with our standard mounting hardware. As a result, we recommend a one-wheel kit for installation on the front wheel of your trike. Of course, if you are up for making your own custom brackets for the rear wheels, you may purchase a two-wheel kit.