International standard : Shimano, FSA etc
A1 front and back
Standard : Campagnolo, Stronglight compact
B1 front and back
The standard Campagnolo, Stronglight compact require positionning the chain ring so diametrically opposite (180° rotation in the direction of clockwise)
over the standard Shimano, FSA etc.. because of the geometry of the star.
A1 front
A1 back
B1 front
B1 back
THE ARE 3 different spacings :
The 130mm international standard : Shimano, FSA etc...
The 135mm Campagnolo (reverse star mounting plate) so diametrically opposite international standard..
