Burgtec Cinch Thick Thin ChainringWhen you need the utmost confidence in your drivetrain, Burgtec Thick Thin Cinch Chainrings deliver. Designed to be compatible with RaceFace Cinch and TRP cranks.Designed and tested in MTB heaven, the Peak District.Made from Aerospace Aluminium.Note: These are compatible with both Boost and Non-boost bikes.