Ultra Bee Brake for E-Bikes (Super73, Macfox, Ridstar, and More)Ultra Bee rear brake kit for Super73, Macfox, Ridstar, Freego, Zooz, and similar style ebikes. Many think these top of the line brake are overkill however after months of testing, and customer feedback they surprisingly fit these bikes well, coast well for wheelies, and have super good modulation. The correct rotor size depends on the size your bike model uses stock, recommend using roughly 40mm larger than the stock size or the the closest available