Single steel chainring with cotterless crank Teeth :36T,38T,40T,42T,44T,46T,48T size: 1/8”,3/32” Crank: steel, 152mm£¬165mm,170mm Axle size: 3T(35-52-39) Packing:20Set/ctn,45×39×18cm G.W: 18Kgs