<!--ProdInc[300201557]/Mall:[backcountry_US]-->Despite the widespread adoption of single-ring drivetrains in the mountain bike world, Shimano refuses to give up on double-ring setups. A 2x drivetrain offers closer steps between gears, making it easier to find your ideal cadence when you''re spinning up sustained climbs with slight variations in gradient. It''s also great for riders that prefer to have more top end gearing without sacrificing their low end gears. For these reasons, Shimano offers the XT FC-M8100 2x Crankset as part of their new XT 12-speed group. It uses the same Hollowtech II construction you''re familiar with from previous years, but now uses direct mount chainrings, a special gear tooth profile for improved chain retention, and a narrower 172mm Q-factor for quick power and comfort in the saddle. This version features a 48.8mm chain line that''s best suited to bikes with non-Boost 12 x 142mm rear hub spacing. <h3>Details</h3> Refined 2x crankset for Shimano XT 12-speed drivetrains Chain line is optimized for bikes with non-Boost hub spacing Hollowtech II construction is lightweight, stiff, and strong Direct-mount chainring makes gearing swaps a breeze Special gear tooth profile for improved chain retention Cranks can be easily swapped between 1x and 2x setups Narrowest possible Q-factor for compact fit and pedaling efficiency Item #SHIU18C <h3>Tech Specs</h3> Arm Material : cold-forged aluminum Arm Length : 165mm, 170mm, 175mm Chainring Sizes : 36 / 26t Rings : 2x direct mount BB Type : [recommended Pressfit BB] Shimano BB-MT800-PA, [recommended threaded BB] Shimano BB-MT800 Spindle : 24mm Q Factor : 172mm Chainline : 48.8mm Compatible Components : Shimano C <a href=''https://www.backcountry.com/shimano-xt-fc-m8100-2x-crankset?SHIU18C-BLA'' target=_blank><img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=backcountry&ProdInc=300201557&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px'' border=0></a>