Description This Cane Creek 10-Series is great if you want to install a new headset on older Aventon models. While the 10-Series still has the look and feel of the 40-Series, you can save some cash to spend on dropbars or tires. Applications: complete headset assembly comes with a short cover and fits ZS44 frames with 1-1/8" straight forks, such as: Aventon Cordoba pre-2016 models Aventon Mataro models (older models with straight 1 1/8" head tube and fork) In addition to Aventon products, it can also fit many other makes/models. Notes: does not fit the "modern" Aventon Mataro (versions with tapered head tube) S.H.I.S. Dimensions: ZS44/28.6-top and ZS44/30-bottom, Cane Creek part #BAA0058K SPECIFICATIONS TECH DESCRIPTIONZS44/28.6/H8/K|ZS44/30/H4/K TOP TYPEZS - ZeroStack TOP HEAD TUBE INSIDE DIA.44.00mm STEM CLAMP DIA.28.6mm TOP STACK HEIGHT8mm TOP BEARING TYPEBlack Oxide BOTTOM TYPEZS - ZeroStack BOTTOM HEAD TUBE INSIDE DIA.44.00mm CROWN RACE SEAT DIA.30.015mm CROWN RACE TYPEPolymer BOTTOM STACK HEIGHT4mm BOTTOM BEARING TYPEBlack Oxide MATERIAL6061 WEIGHT62.79g TECH DESCRIPTIONZS44/28.6/H8/K|ZS44/30/H4/K TOP TYPEZS - ZeroStack TOP HEAD TUBE INSIDE DIA.44.00mm STEM CLAMP DIA.28.6mm TOP STACK HEIGHT8mm TOP BEARING TYPEBlack Oxide, Sealed BOTTOM TYPEZS - ZeroStack BOTTOM HEAD TUBE INSIDE DIA.44.00mm CROWN RACE SEAT DIA.30.015mm CROWN RACE TYPEPolymer BOTTOM STACK HEIGHT4mm BOTTOM BEARING TYPEBlack Oxide MATERIAL6061 WEIGHT62.79g