2011 hot selling bicycle chainwheel,bike chainwheel,chainwheel & cranks

1.material--carbon steel

2.chainring--triple sheets (three speed)

3.chainwheel tooth/sprocket--24*34*42T / 28*38*48T

4.crank length--15mm/165mm/170mm plastic coated

5.axle hole --square cut (cotterless)

6.weight--1200g

7.packing--20 sets per carton

Products are made up to ISO9001,and can be made to guests' orders.