Fits headtube internal diameter - 44mm Upper - EC44, 55mm Lower - ZS55
Upper cup is external (EC) - will fit frames using ZS44 (ZS) upper headcup as standard
41 / 52mm OD, 45 x 45 Degree AC sealed bearings.
Insertion depth: 9mm Upper, 16mm Lower.
Cup Stack height: 3.5mm - Total upper stack height inc bearing cover: 15mm
Proudly machined in the UK from 6082 T6, Black Anodize finish
Complete with headset top-cap and star-nut.
Simply order the correct headset from the list of available headtube lengths below, if your frame is not listed please contact