Origin8 Twistr Semi-Integrated & External ZS44/28.6|EC49/40 Headset Weight-290 Extends fork`s steerer tube length

Extends fork`s steerer tube length to raise stem

Inner and outer plate chamfering provide accurate and expeditious shifting

CO2 inflator 16g CO2 cartidge 2-in-1 tire reamer / plug insertion tool serrated knife/saw plug retainer

Smooth center tread with textured shoulders

Origin8 Twistr Semi-Integrated & External ZS44/28.6|EC49/40 Headset Weight-290 Extends fork`s steerer tube lengthHighly polished sealed angular contact premium bearings ensure smooth operation. CNC machined AL6061 top cover is sealed to keep moisture and grit away from the bearings. CNC machined AL7075 crown race protects the lower bearings and fork. AL6061 top cap forged stainless steel bolt and star nut TECH SPECS SHIS ZS44 28. 6 EC49 40 Color Black Weight Steered OD 28. 6mm Cup (mm) 44mm 49mm Race (mm) 40mm Stack Height 12. 7mm Top 12. 3mm Bottom Bearing