20inch bicycle chainwheel and crank Pass ISO9001:2000 & CCC OEM services provided High quality with cheap price Salable chainwheel and crank1.Material:steel and aluminium alloy2.Finish:CP OR. ED3.Polish:as customer require4.Teeth:24/26/28/32/36/38/40/42/46/48/52,as customer require5.Crank L: 89mm ,102mm,127mm,152mm,165mm,170mm,175mm6.Use:BMX,MTB,kids bicycles,road bicycles7.High quality with ...