The standards for headset performance, durability and value are set by the 40-series. Drawing from the Premium 110-Series Design, the 40-Series incorporates all the features necessary for a durable, light-weight, long-lasting headset.
. Part Number: BAA0077K
. Technical Description: ZS49/28.6/H8/K|ZS49/30/H4/K
. Top Type: ZS - ZeroStack
. Top Head Tube Inside Diameter: 49.61mm
. Stem Clamp Diameter: 28.6mm
. Top Stack Height: 4mm
. Top Bearing Type: Black Oxide, Sealed
. Bottom Type: ZS - ZeroStack
. Bottom Head Tube Inside Diameter: 49.61mm
. Crown Race Seat Diameter: 30.015mm
. Crown Race Type: Steel, Face-Sealed
. Bottom Stack Height: 4mm
. Bottom Bearing Type: Black Oxide, Sealed
. Material: 6061
. Weight: 115g