SRAM NX EAGLE DUB 12-SPEED CRANK 32T Size:170mm They are 70% lighter and

They are 70% lighter and 14% faster than standard butyl tubes

Secure attachment for round or aero handlebars

1 x Garmin HRM-PRO Plus Transmitter

Does not fit traditional ISCG mounts

SRAM NX EAGLE DUB 12-SPEED CRANK 32T Size:170mm They are 70% lighter andDesigned for SRAM's X SYNC2 chainrings, the NX crankset is engineered for complete chain control each tooth's profile is precisely engineered to work quietly, efficiently and securely with the Eagle chain's inner and outer links. DUB technology features a better engineered bottom bracket and a new spindle design, which together allows for a more uniform approach to bottom bracket fitment, better sealing against contamination and forward and backward