The all-new XX1 Eagle Carbon Tuned crankset is Sram`s lightest, stiffest and strongest to dateDesigned specifically for 8 bolt Quarq Powermeters only (#211696 / #211695)Crankarms only - Does not include bottom bracket, spider, or chainringQuarq 8 Bolt170DUBCRBNDirect Mount1x12UPC/EAN/GTIN: 710845839276