Triple chainwheel crank 24/34/42x170mm, Cotterless plastified,
Skilful front derailleur,
Skilful rear derailleur,
7 speed freewheel 14-28t index,
skilful easy fire shifter 3×7 speed,
Chain 7 speed, index, narrow,
Model name – 21 speed gear kit,
Suitable for – front & rear,
Used for – mtb bike, road bike, racing bike,
Chainwheel material – steel,
Freewheel material – steel,
Front & rear derailleur material – alloy,
Fire shifter material – alloy,
Chain material – steel,
lxbxh – 275x200x100mm,
Weight – 2.925kg.