Aheadset ZS ZeroStack Threadless Headset (1-1/8") (ZS44/28.6) (ZS44/30) - AHDZS286AK
Aheadset ZS ZeroStack Threadless Headset (1-1/8") (ZS44/28.6) (ZS44/30) - AHDZS286AK, From the originator of the threadless headset--a low stack height version with bearing cups securely recessed inside the head tube.