Shimano has modernized its 1x12 gravel groupsets by incorporating advanced technology from its recent MTB groupset revamps. While competitors like SRAM dominate the wireless market, Shimano's innovation has been to methodically enhance their drivetrain offerings. The new RX827 GRX rear derailleur is a key feature, utilizing lessons learned from MTB components and replacing the previous design's battery with an onboard option. With a robust chain retention method, these updates position Shimano's gravel tech competitively in an evolving market.
A wide-range 1x12 cassette has been a reality for GRX as a mechanically operated system, and the newest addition here is the RX827 rear derailleur, which replaces the seatpost-mounted battery with the new BT-DN320 on-board battery and draws inspiration from the new Di2 MTB rear derailleur design found in XTR, XT, and Deore.
Borrowing from recent updates to Shimano's MTB offerings allows the GRX components to benefit from a robust dual-spring mechanism for chain retention, enhancing the riding experience.
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