Park Tool's excellent CM-5, CM-5.2, CM-5.3 Cyclone chain cleaning machines are highly effective, and because folks use them to keep their drivetrain clean and function, the foam scrubbers and nylon brushes wear out over time. It is a good thing Park offers this RBS-5C Rebuild Brush Kit so you can freshen up your Cyclone and continue your dedicated maintenance work.

With the RBS-5C you get replacements for the large side scrubbing brush, two roller brushes, and two wicking foam blocks. It is simple to remove the worn items and replace with the new ones, so there are no excuses. We have found that replacing all of the pieces at once and using Park's CB-4 Bio ChainBrite cleaner delivers the best results.