New 2027 SRAM XX DH Transmission Drivetrain on Test – Direct-Mount goes DH!

SRAM has officially introduced its new XX DH Transmission drivetrain, marking a significant evolution in downhill mountain biking technology. This direct-mount system, previously seen in their trail and enduro offerings, brings a slim cassette, exceptionally high chain tension, and an electronically controlled rear derailleur positioned close to the frame. The stated goals are robust performance and quiet operation, with early tests confirming its integration into the demanding DH segment.

This move is a natural progression for SRAM, extending their proprietary Transmission architecture into a discipline where drivetrain resilience is paramount. The full-mount system, which eschews a traditional derailleur hanger, has already proven its mettle in enduro racing, promising enhanced durability and precise shifting even under extreme loads. For downhill, where impacts are frequent and component integrity critical, this design could significantly reduce race-ending mechanicals and simplify setup, potentially reshaping component choices for top-tier teams.

SRAM's continued push for proprietary ecosystems, now firmly entrenched in downhill, certainly streamlines their product line. Whether the market, and indeed gravity riders, truly embrace another hanger-less future remains to be seen.