The Hellbender 70 bottom bracket utilizes bearings made of 440C stainless steel providing exceptional ride quality and reliability while striking a perfect balance between value and lasting performance. Marine-grade grease and robust bearing seals complete the package in terms of durability.440C stainless steel bearings with a dual lip seal and marine grease offer durability and corrosion resistance6061 T6 machined aluminum cups are lightweight and durable 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;} Bottom Bracket Shell I.D. 1.37 BB/Frame Interface English BB Shell Width (mm) 73 Weight 92 Defined Color Blue