Quotthe benchmark disc compatible front hubquotkey features sealed stainless steel cartridge bearings hub shell machined from forged aluminium billet available to suit all axle sizes and types standard 6 bolt disc fitting unsurpassed reliabilitypro 2 evo front hub tech specs gt sealed stainless steel cartridge bearings throughout machined from forged 2014 t6 aluminium billet available in 28 32 and 36 hole drillings conversions available for qr 9mm 15mm and 20mm a