a redesigned mast tube collar for stability

or to the B-RAD base for additional carrying options

allowing between 0-15 degrees of float

outer rings have PowerGlide pins/ramps

NOTE: Not for use with carbon seat rails or ovalized seat rails

SHIMANO 105 R7100 Crankset - 2 x 12-Speed - 50-34t - 172.5mm garminpromo a redesigned mast tube collarThe newly designed crank arms offer an optimized balance between lightweight and efficiency. The crank, formed with hollow aluminum technology, is anodized with a beautiful gloss black anodized finish, giving it a luxurious look. The resin ribs on the back of the chainrings are SHIMANO 105's unique structural design that achieves both thorough weight reduction and crisp shifting performance.