Wolf Tooth Premium Headset - EC49/40 Lower Blue CheckoutSpec= X-12 System 5" 12 x 148mm 6-Bolt

5" 12 x 148mm 6-Bolt XDR

Moulded lower shell for added durability

Made from 6061-T6 Aluminum

Color Black Rings 50/34 Number of Chainrings Double Crank Length (mm) 165 Crank Intended Use Road Drivetrain Speeds 11 BB Included No Pedal Spindle 9/16" Spindle Interface Type Shimano Hollowtech II Chainring BCD 110 Shimano Asymmetric Chainline/Hub Compatibility 135/142 Road Disc Hubs < 415 mm Chainstay Defined Color Black

Wolf Tooth Premium Headset - EC49/40 Lower Blue CheckoutSpec= X-12 System 5" 12 x 148mm 6-BoltWolf Tooth Premium Headset EC49 40 Lower Blue. Wolf Tooth Premium headsets are machined out of aircraft grade aluminum and feature high end bearings made by Enduro. They are engineered to use the largest possible ball size and are filled with high pressure waterproof lubricant. A pair of dual lip seals ride in micro grooves to keep out water and debris. Stainless Steel Bearings provide unparalleled corrosion resistance Highly recommended if your