The Shimano SLX FC-M7100 crankset for MTB offers the simplicity of a 1x drivetrain with the stability and compatibility of Hollowtech II technology.Chainring sold separatelyHollow forged crank maximizes power transfer while limiting weightShimano&';s Hollowtech II technology provides the best balance of stiffness strength weight and rotating performanceFeatures 52mm chainline172mm Q-factor 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;} Rings Sold Separately Number of Chainrings No Rings Included Drivetrain Speeds 12 Chainring BCD Direct Mount Chainline/Hub Compatibility 141/148 Boost Hubs Color Black Crank Length (mm) 165 Crank Intended Use Mountain BB Included No Pedal Spindle 9/16" Spindle Interface Type Shimano Hollowtech II Defined Color Black keyword search FC-M7100-1 Size 165Mm