Bell bicycle dunlop 80 mm smiley 1042275 & nbsp; bell bicycle will help you take o security on bicycle path. Design perfectly fit fit in w w every type bike u i is practical supplement bicycle equipment. universal and easy in support system assembly. loud and clear sound. & nbsp; data technical: & middot; dimensions C sewage bell: 8 x 5 cm (diameter x gr.) & middot; dimensions whole bell: 8 3.5 cm (diameter knocker) x 6.5 cm (Greek Bell mechanism to mounting) & middot; diameter diameter buckles up assembly: appro