The headset is combined with upper ZS44 semi-integrated (zero stack) and lower ZS55 semi-integrated (zero stack) internal cups, compatible with 44-55mm (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