e*thirteen Helix Race Cassette - 12-Speed 9-52t Bronze MFPN=100002547 WTB's proprietary 4D spoke drilling

WTB's proprietary 4D spoke drilling prevents binding and lateral loading of the spokes while the spoke bed itself has been updated to provide a more compatible interface between the spoke and rim

and on some Specialized alloy 110BCD spider

Cut Out No Saddle Cover Material Microfiber Color Brown/Black Gender Unisex Saddle Weight 236g Primary Color Brown Rail Material Lux-Alloy Saddle Dimensions 260 x 140mm

Compatible with most 10 speed drivetrains

e*thirteen Helix Race Cassette - 12-Speed 9-52t Bronze MFPN=100002547 WTB's proprietary 4D spoke drillingThe e*thriteen Helix Race 12 speed 9 52t cassette is engineered to deliver precision shifting performance with an industry leading 578% gear range. The proprietary 9 tooth smallest cog combined with the 52t largest cog enables the use of a smaller chainring for improved clearance lighter system weight and a lower bail out gear ratio without high gear compromise. Seamless cross compatibility with Shimano SRAM and TRP 12 speed drivetrains Patented 2