We do not recommend riding the bike in conditions that exceed your or your bike’s ability.
Wet, snowy, or icy weather impairs traction and visibility for the cyclist and vehicles sharing the road. The stopping power of the brakes, traction of tires, and grip of the rider's feet on the pedals are all lessened in these conditions. If your feet slip off the pedals, tires lose traction, or the brakes cannot stop you appropriately it could lead to a fall.
When using a bike in cold weather it is best to store it out of the elements and above freezing temperatures. If that is not possible then the battery must be moved inside for storing and charging (it only takes a few seconds to remove the battery). The most important thing is to charge the battery at room temperature (50° to 77°F). Riding in cold temperatures decreases the battery range slightly but the difference is generally inconsequential and small enough to go unnoticed.
The RadRover and Radmini both have fat tires, which handle admirably in snowy conditions. There are customers who have installed studded tires but, due to lack of internal testing, we cannot recommend any specific options.
The bikes should not be used in temperatures lower than -4°F.
For more advice on winter riding, we've published an article on the RPBlog that can be of use. That article is Winter Riding: No Such Thing As Bad Biking Weather.