CeramicSpeed Pulley Wheels Shimano XT/XTR 12-Speed - 14 Tooth Coated Races Alloy BLK Weight-79 Smaller sizes feature a non-aero

Smaller sizes feature a non-aero design

Rim Durability - rim has internal reinforcements and thicker walls vs

}SRAM Force 1x XPLR Wide Crank Arm Assembly - 165mm 12/13-Speed 8-Bolt Direct Mount DUB Spindle Carbon E1

The Arch S1 was designed to provide traction and control when running 2

CeramicSpeed Pulley Wheels Shimano XT/XTR 12-Speed - 14 Tooth Coated Races Alloy BLK Weight-79 Smaller sizes feature a non-aeroCeramicSpeed pulley wheels reduce friction last 3 5 time longer than stock high end pulleys and are designed to work with less drag. Premium Grade 3 Silicon Nitride Ceramic balls Hand built in Denmark Drivetrain Speeds 12 Fits Brand Shimano