Road bike 700C aluminum alloy adult road bicycle speed double disc brake racing 21/ 27/ 30 speed curved road bike

Road bike 700C aluminum alloy adult bicycle speed double disc brake racing 21/ 27/ 30 speed curved road bike

Configuration table

Speed                   21                                27                                     30

Frame           Aluminum alloy           Aluminum alloy               Aluminum alloy

Paint            Electrostatic paint         Electrostatic paint           Electrostatic paint

Handlebar     Carbon steel                 Carbon steel                     Carbon steel

Stand up                        Aluminum alloy four nails stand up

Central axis    ??seal shaft             ?? seal shaft                   ??seal shaft

Brake               disc brake                     disc brake                        disc brake

Dialer           Shimano TX-30           Shimano 370            micro-transfer TS81-10

Front derailleur   Shimano TX-30        Shimano TX-30                  Shimano 370

Rear derailleur     Shimano TX-50        Shimano TX-30                  Shimano 370

Dental plate    Aluminum alloy         Aluminum alloy              Aluminum alloy

Pedal                                            Semi-aluminum pedal

Rims                                Aluminum double-layer bike edge ring

Tire                                                 ??25c black tire

Tower wheel      7-position                   9-position                         10 cassette 

 City Road bike 

Paint frame    Aluminum alloy   Multi-color optional

Leading the new trend of the times

Detailed description

1.Paint frame.Exquisite paint,not easy to rust.

2.Aluminun alloy frame.Strong and sturdy,ride at easy.

3.Mechanical disc brake.Solid material,exquisite workmanship.

4.Aluminum alloy tooth plate.High secunity and good stability.

5.Precision shifting system.21/27/30-speed multiple options,to meet your different needs and more stable.

Product parameters

Scenario shows

Factory strength display