21 SPEED GEAR SET Cycling Kit 16 SIS rear index shifting Speed:

SIS rear index shifting Speed: 6 / 7 speed

8 mm thickness

which gives you smooth pedaling

make everyone can heard you

Structure: Standard

21 SPEED GEAR SET Cycling Kit 16 SIS rear index shifting Speed:This is Bicycle 21 Speed Gear Set Combo Accessories. Cycle Derailleur 21 Speed. Stable performance and high reliability. Made of durable and practical, long service time. Come with smooth rotation 21 Speed Freewheel For Geared Cycle. Providing fast riding speed with less effort needed, reliable to use. This Cycle 21 Speed Gear Set Combo Accessories to provide a relaxing riding experience. Come with Combo of 21 Bicycle Accessories. In this combo