Description
4-branch osymetric trays Stronglight 110 BCD Shimano FC9100 44 x 56 T
DURA-ACE FC-9100 O.SYMETRIC 4-spoke chainring kit .oval design for optimal movement .material: aluminum Advantages .easier to overcome the dead center .higher efficiency: i.e. lower heart rate with equivalent effort .permanent pressure in the knees is reduced
