Obcas sa tiez podari piskat brzdami ale skorej vyuzivam hlucny orech Campagnolo 
Nieco taketo by sa vsak mozno hodilo:
http://dx.com/p/plastic-360-degree-rotation-electronic-horn-for-bicycle-black-2-x-aaa-176157
alebo vacsie: http://dx.com/p/6-alarm-sound-bicycle-horn-with-mount-black-1-6f22-9v-100db-52764
tato je uz iny extrem: http://dx.com/p/ultra-loud-bicycle-air-horn-truck-siren-sound-120db-23681
Nieco taketo by sa vsak mozno hodilo:http://dx.com/p/plastic-360-degree-rotation-electronic-horn-for-bicycle-black-2-x-aaa-176157
alebo vacsie: http://dx.com/p/6-alarm-sound-bicycle-horn-with-mount-black-1-6f22-9v-100db-52764
tato je uz iny extrem: http://dx.com/p/ultra-loud-bicycle-air-horn-truck-siren-sound-120db-23681
Kamarat mal volakedy v kapsicke baterku z motorky a na rajdoch podtlakovku, total jak kamion. A ta vaha ... 40kilovy bicykel 
