Sprockets foe HS-863/1873/1873T/1873T-EL/1873D/1873GD/1873TAB-GD series
Standard Teeth Choice:15T/17T/19T/21T/23T/25T/27T/29T/31T
Standard Bore Choice:14MM/16MM/20MM/25MM
Other bore sizes in imperial units are available.
For more informations,pls visit our websites or give us inquiry,tks.