20" alloy folding bike SA033, inner 3speed
 

Frame:S type, Aluminium frame,TIG welded, patented Alloy Latch system

Fork: Alloy bend blade fork

Handlepost: Adjustable radius alloy telescopic handlepost, patented  hinge

Seatpost: Oversize, Aluminium

Brake: Tektro, alloy front & rear V-brake

Rims: Aluminum, doublewall, CNC machined sidewalls 

Tire: CST, C1653, 20"*1.5, Black, 60TPI carcase, light tread, sidewall & Bead , ultra Light running resistance, Discharging water quickly in raining day

Hub: Aluminium cartridge bearing hub, W/QR

Crankset: Steel chainring &aluminium cranks

Gear system:Shimano inner 3speed