Fits headtube internal diameter - Upper - EC44 - 44mm,  Lower - EC49 - 49.61mm

Upper cup is external (EC) - will fit frames using ZS44 (ZS) upper headcup as standard.

 To suit  tapered steerer tube forks. (28.6 - 39.79)

45 x 45 Degree AC sealed bearings.

Insertion depth: 9mm Upper, 16mm Lower.

Cup Stack height: 9mm upper- Total upper stack height inc bearing cover: 15mm

Cup Stack height: 14mm lower.

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 us.