The headset is combined with upper ZS44 semi-integrated (zero stack) and lower ZS56 semi-integrated (zero stack) internal cups, compatible with 44-56mm (upper-lower) headtube ID and 1 1/8” straight and 1 1/8"-1 1/2" tapered fork steering tube Suitable for new build, or replacing the failed headset on mountain bike (MTB) or road bike Sealed bearing to fend off dirt, dust and water, ensuring long service life Made of high strength aluminum alloy Anodized color finishing The headset is combined with upper ZS44 semi-integrated (zero stack) and lower ZS56 semi-integrated (zero stack) internal cups, compatible with 44-56mm (upper-lower) headtube ID and 1 1/8” straight and 1 1/8"-1 1/2" tapered fork steering tube

The headset includes all the necessary components including star nut, compression ring and bolt, cups, sealed bearings and crown race, top cap etc.

Please measure your headtube size against product page’s pictures and verify fork type before ordering.