HG XDR 24 fori mozzo mozzo bici da strada cricchetto 36T rumoroso mozzo bicicletta disco di blocco centrale
Mature dual spring 36T ratchet system. Patented ratchet structure with a biting angle of only 6.9 °, making the pedal response faster and more efficient. Rear wheel hub seal bearing. Maximum tensile force of single spoke hole: 2500n.