Dmr single cassette sprocketdmr has been designing and creating some of the best mountain bikes and components for nearly 20 years our team of designers continue to work with the sports biggest names to create products that will endure the riding we all know do and love upgrade your ride with dmr wheels and spares features single speed cassette sprocket for shimano pattern3 1mm thick configuration 12t 13t 14t 15t 16t or 18t buydmr wheels tyresfrom chain reaction cycles the world