Swiftwick Aspire Four Socks - 4" Black Stripe Medium MPFN-HWQASM00S1460S Double or Triple DoubleDrivetrain Speeds

Double or Triple DoubleDrivetrain Speeds 12Front Derailleur Clamp Braze-onFront Derailleur Cable Pull ElectronicFront Der/Shifter Compatibility Shimano Road Di2Max Ring (teeth) 48Front Derailleur Style TraditionalDerailleur Capacity 17

5-55mm A1-B1

2 replaceable SP7 (M4x6mm) pins per side

With upgraded clamp jaws clutch components and mast hardware the Pro Mechanic is more durable more stable easier to use and even more reliable

Swiftwick Aspire Four Socks - 4" Black Stripe Medium MPFN-HWQASM00S1460S Double or Triple DoubleDrivetrain SpeedsThe Aspire offers a thin breathable feel and firm compression for enduring performance on runs rides and more. Engineered with moisture wicking fibers it keeps feet and ankles dry secure and supported. Engineered with an ultra thin profile to deliver unparalleled fit & feel Signature Olefin fibers wick moisture keeping your feet cool dry and blister free Grips the contours of your feet to support the arch and help reduce fatigue 53% Nylon 39% Olefin