SRAM RED Aero X-Sync Direct Mount Chainring - 50t 12-Speed 8-Bolt Direct Mount 6.5mm Offet BLK E1 ModelNumber=G0772 and outer cartridge bearing

and outer cartridge bearing

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Zandstra Ice Blade Holders are plastic and velcro ice blade holders

Two finger lever blade

Other patents pending

SRAM RED Aero X-Sync Direct Mount Chainring - 50t 12-Speed 8-Bolt Direct Mount 6.5mm Offet BLK E1 ModelNumber=G0772 and outer cartridge bearingSingle ring drivetrain simplifies functionality and reduces weight Direct mount aero chainrings for better aerodynamics X SYNC wide tooth, narrow tooth chainring technology provides maximum chain control SRAM Model ID: CR XSNC DM E1 TECH SPECS Chainring Comp. SRAM FlatTop BCD Direct Mount SRAM 8 Bolt Narrow Wide Design Yes Teeth 50 Speed 12