The chainring is an essential part of the bicycle. It is intended to be placed on the crankset. It must be chosen with great care. On the bike, there can be 1 or 2 or 3 chainrings. The chainring is a sprocket on which the chain links of the bicycle are placed. The diameter of the chainring attachments is an essential piece of information to know if a chainring is compatible with its crankset. This measurement is called BCD (Bolt Circle Diameter). The chainrings for vintage bikes are made of steel or aluminum.
Campagnolo chainring
model: Gran Sport three attachments
42 teeth
BCD 141
year : circa 1975
position : inside
for: 5-6 speeds
material : aluminium
colour : aluminium
number of mountings: 3
mounting centre distance: 126 mm
weight: 46 g
origin: Italy
condition : new item, old stock, very good condition.
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