Internal or externally routed: Externally routed with the cable entering the post at the collar

Construction: Made with an in-mould polycarbonate shell that is bonded to an EPS foam liner

requiring no zip ties or tape

Volume adjustability: Air volume can be adjusted by removing or replacing bottomless tokens

End Cap: Snap-fit end cap

Burgtec Thick-Thin Direct Mount Chain Ring - SRAM Direct Mount - 3mm Boost - Round - Purple Rain - 9-12 Speed - 34T Images Uploaded - Ready for Review Internal or externally routed: ExternallyKeep that chain in place where it should be with a Burgtec Thick Thin Chain Ring. Designed with a proven thick thin tooth profile for improved chain retention. Who's this item for: Riders who use 1x drivetrains and are looking for superior chain retention as well as durability. Weight: 0. 08g Pros: Wide range of tooth options. Works for 9, 10, 11, and 12 speed setups. Great build quality. Cons: Oval options not available in all mounting types.