- Scrubbing dirt from your tyre’s and cassette after a long ride can be a chore, so we designed a specific brush to help make the job a little easier. Stiffer-than-average nylon bristles make short work of any grime your bike has picked up from the road or trail. Simply spray some of our pink Nano Tech Bike Cleaner on the affected areas, agitate with the Tyre & Cassette Brush and rinse.