Ktrak - Patented wheel system that turns a mountain bike into a pedal-powered snow machine and all terrain vehicle. Created by Kyle Reeves, the biking innovation is a kit that can attach to the rear of any mountain bike. It creates traction on previously ‘unridable’ surfaces such as snow or sand, turning your bike into a snow or sand plough.
Bike spikes, made specifically to ride on snow and ice, are the equivalent of snow chains but for bikes. They are made of six flexible parts with embedded spikes as well as a metal wire that runs through them in order to tighten onto the wheel, while remaining easy to put on and off, and to fold. Really need them for my kids bikes right now in Copenhagen, Denmark