Works Components 1.0Adeg angle-adjust headset with EC34 upper and EC34 lower cups for 1 1/8" steerer tubes and head tubes between 127-136mm in length . CNC-machined in the UK from 7075-T6 aluminum with sealed bearings. Allows + or - geometry adjustment. Fits frames with 34mm upper and 34mm lower internal head tubes. 1 1/8" steerer tube compatible. Ideal for trail, enduro, road and downhill bikes. Works Components Angled Headsets Explained Adjusts the bike&&';;s head tube 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 head tube length specific. This headset is suited for head tubes between 127-136mm in length 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. EC34/28.6 / EC34/30 Stack 16mm/11mm Head tube Length 127-136mm Head tube Internal Diameter Upper: 33.95mm (EC34) / Lower: 33.95mm (EC34) Cup Insertion Depth Upper: 12mm / Lower: 12mm Upper Bearing 41mm OD, 45 x 45Adeg AC sealed bearing Lower Bearing 41mm OD, 45 x 45Adeg AC sealed bearing Color Black