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The bottom bracket is a very important part of a bicycle. It is placed into the bottom side of the frame and is one of the parts responsible for the bike traction system since it supports the power while pedalling. It is where you connect the cranks, and afterwards the chainring and pedals.
This Italian bottom bracket belongs to the JIS standard, it is 107 millimetres long, it has sealed bearings, with steel shaft and cups. Italian bottom brackets are normally used in old bikes. This is the bottom bracket of choice if the crankset of your bike tells you to combine it with a 107mm bottom bracket. This way you'll ensure the perfect chain alignment of your bike.