bicycle parts
1.shell: steel W/coaster brake
2.Spoke Holes: 16H.20H.28H.36H.48H
3.Axle:s45c . cr-mo

Bicycle parts--HUB

1.SY--DC-HR-31

2.Shell: STEEL

3.Spoke Holes: 14G× 16H.20H.28H.36H.48H

4.Axle:s45c . cr-mo