Spindle must be purchased separately. Use FD140* - An evolution of the original, now exceeding the ISO Race standard - Low profile crank arm reduces pedal strike during technical climbs - Compatible with SRAM 3-bolt direct mount chainring interface - Q Factor: 167mm for 52mm Boost (176mm for Super Boost+) - Now features a matte finish - 5 year warranty - Weight: 610g (165mm length with 29mm spindle) 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 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;} Model R-Spec Trail Enduro Length 160mm Direct Mount/BCD 3-Bolt Configuration 1x Spindle Interface 5Dev Material Aluminum Color Raw Silver