e*thirteen Helix R Chainring – 32t 11/12-Speed 3mm Offset SRAM 3-Bolt DM Black. The e*thirteen Helix R 3-Bolt Direct Mount Chainrings engineered for SRAM 3-Bolt crank systems merge aesthetics with robust durability. e*thirteens narrow-wide tooth profile ensures compatibility with Shimano and SRAM 11 and 12-speed drivetrains. Manufactured from AL-7075-T6 aerospace-grade aluminum the rings are CNC sculpted to provide low weights. Elevate your 3-Bolt Cranks diversify drivetrains reduce weight and bring a new aesthetic to your bike with the Helix R 3-Bolt Chainrings.

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