Description
Axe de Roue Avant BLACKBEARING Route 12x100 mm (12mm 122 M12x1 15mm) BF The front derailleur detects the Best Length:340mm PBS_MAVI051726 What pressure should I The front derailleur detects the position of the rear derailleur and automatically shifts to the most efficient gear for the best chainline: you therefore never have to worry about front shifting or corrective changes without the application constraints