Works Components 1.0Adeg angle-adjust headset with ZS56 upper and ZS56 lower cups for tapered steerer tubes and head tubes between 130mm and 139mm in length. CNC-machined in the UK from 6082-T6 aluminum with sealed bearings. Allows + or - geometry adjustment. Fits frames with 56mm upper and 56mm lower internal head tubes. Tapered steerer tube compatible (1 1/8" to 1 1/2") or with 1 1/8" fork with a reducer crown race. Ideal for trail, enduro, and downhill bikes. Works Components Angled Headsets Explained 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 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 ul{font-size:24px;font-weight:600;margin-left:-25px;padding-top:35px;border-top:3px solid #f0f0f0;}.desc li{list-style:none;border-bottom:4px solid #eb212e;width:142px;} TECH SPECS Model 1.0 Degree Angle Headset S.H.I.S. ZS56/28.6 / ZS56/40 Stack 8mm/3mm Headtube Length 130-139mm Color Black Weight -