1.pipeless structure
2.AL profile base
3.backstop position at the pedal crank shaft
4.future design for the electric bike
5.any wheel size available
6.car on boarding
7.DIY bike
Personal profiles
- BAK CHUNDEOK
- Oh! my GOD. I am praying you, hands up_ Before I leave the earth, Before you take me out on the earth, Let me make the useful machine for happiness of earthman.