Model: 20F051
Speed：7SP
Frame：Alloy folding frame
Fork: Steel
Handle Stem：Alloy folding stem
Rims: Alloy double wall, 36H
Hubs: Six-pin disk hubs
Chainwheel: HDL Alloy 52T
Shifter：SHIMANO  TX-30
Rear derailleur：SHIMANO  TZ-50
Freewheel：SHIMANO  TZ-21  7pcs
Tires & tubes：CST 20*1.75 
B.B.set：One-pc waterproof
Pedals: Folding
Brakes: Alloy Mechanic disk brakes