Chain Ring Adapter BCD 104

$20.00

The Chain Ring Adapter BCD 104 is for the BBS02 and BBS01 only. Will not fit the BBSHD.

Bolt Circle Diameter or BCD is the diameter of the circle that goes through the center of all of the bolts on your chainring. On bicycle chainring this dimension is usually measured in millimeters. It is critical to know the BCD of your crankset when you are selecting a new chainring for your bike. In many cases the BCD is printed right on the chainring. Sometimes it is stamped or engraved on the back side of the chainring.

If it is not labeled on your chainring you will need to measure it. On a chainring with 4 bolts the BCD is the distance between two bolts across from each other. It can be somewhat difficult to make this measurement if you don’t have a caliper since the crankarm gets in the way.

Alternatively you can measure the distance between two adjacent bolts and use the table below to determine the BCD. This is the easiest method to use for chainrings with five bolts. Note that there are a few cranksets that have non-standard arm spacing. If this is the case the distance between adjacent bolts will be different as you move around the chainring. If this is the case out standard chainrings will not fit for your application. The image below demonstrates this measurement on a 104 BCD chainring.

Description

The Chain Ring Adapter BCD 104 is for the BBS02 and BBS01 only. Will not fit the BBSHD.

The Chain Ring Adapter BCD 104. When building your BBS02/1  kit you may find that your chain ring that came with your kit will not work. The stock chain ring might hit against the chain stay or might be the wrong size. So, to solve these problems you may use this chin ring adapter. First you must know what size adapter you will need. This adapter, the Chain Ring Adapter BCD 104 means the measured holes in you new chain ring must have a pattern of 104mm when measured correctly.

The Chain ring adapter BCD104 for Bafang BBS01/02 is necessary if you wish to keep the original chain ring that came with the bike you are converting. The adaptor can also be used to move the chain ring out and away from the chain stay.

Bolt Circle Diameter or BCD is the diameter of the circle that goes through the center of all of the bolts on your chainring. On bicycle chainring this dimension is usually measured in millimeters. It is critical to know the BCD of your crankset when you are selecting a new chainring for your bike. In many cases the BCD is printed right on the chainring. Sometimes it is stamped or engraved on the back side of the chainring.

If it is not labeled on your chainring you will need to measure it. On a chainring with 4 bolts the BCD is the distance between two bolts across from each other. It can be somewhat difficult to make this measurement if you don’t have a caliper since the crank arm gets in the way.

Additional information

Weight 5 lbs