Adjusts the bike&';s headtube angle by 1.0 degree 1.0 degree headset will lengthen a bikes wheelbase by around 10mm, and lower the bottom bracket by 2mm Due to angled nature, headsets are headtube length specific Precision CNC-machined from 6082-T6 aluminum and anodized in the UK Includes top-cap, star nut, bearings and crown race TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Model 1.0 Degree Angle Headset S.H.I.S. EC44/28.6 / ZS56/40 Stack 16mm/2.5mm Headtube Length 100-109mm Color Black Weight -