The RadRover 2019 and the RadRover 5 and RadRover Step-Thru 1 use 26" fat tire wheels, and their frames are a unisex design, so they fit a wide range of individuals.
The RadRover 2019 and RadRover 5 frames are closest to an 18’’ frame on a conventional frame sizing chart and have a standover height of 30.5". From our experience, these bikes fit well for people between 5'4" and 6'2" tall.
The RadRover Step-Thru 1, introduced for early 2020, has a standover height of 20.24" and is recommended for riders between 5'0" and 6'2".
We have a video that shows riders of different heights on the RadRover 2019, and you can check that out HERE.
The following sizing chart is valid for the RadRover 2019 model (stay tuned for RadRover 5 and RadRover Step-Thru 1 charts, which will be available on their product pages once these bikes are available for purchase):
RadRover models released prior to 2019 may vary slightly in their geometry/sizing.