SRAM RED X-Sync Chainring - 42t 12/13-Speed 8-Bolt Direct Mount 6.5mm Offset BLK/Silver E1 Model=858 NSW Rear Wheel Armrest Stack: 40mm

Armrest Stack: 40mm

}Promax SQ-1 Crank Arm Set - 160mm Square Taper JIS Spindle Interface 110mm BCD Gold

Bearing Type Sealed Cartridge Center to Flange Left 22 Center to Flange Right 37 Color Black Defined Color Black Flange Diameter Left 41

Width: 80mm 63mm 45mm (center to center)

SRAM RED X-Sync Chainring - 42t 12/13-Speed 8-Bolt Direct Mount 6.5mm Offset BLK/Silver E1 Model=858 NSW Rear Wheel Armrest Stack: 40mmSingle ring drivetrain simplifies functionality and reduces weight X SYNC wide tooth, narrow tooth chainring technology provides maximum chain control SRAM Model ID: CR XSNC DM E1 TECH SPECS Narrow Wide Design Yes Teeth 42 Chainring Comp. SRAM FlatTop BCD Direct Mount SRAM 8 Bolt Speed 12