Complex sentence: Winter bikers may have to clean caked-on ice and snow from brake pads, rims, and derailler cassettes during and after a ride, to remove corrosive road salt and metal-wearing grit and sand from chains and deraillers.
Split into simpler sentences: Winter bikers may have to clean caked-on ice and snow from brake pads, rims, and derailler cassettes during and after a ride. More maintenance and cleaning is needed for winter biking to remove corrosive road salt and metal-wearing grit and sand from chains and deraillers.