велосипедный: http://www.google.com.ua/imgres?imgurl=http://www.extremalov.net/content/cat/full/big_drugie_cveta_572_pic-66e54.jpg&imgrefurl=http://www.extremalov.net/link/zamok-dlya-velosipeda-8x1500/&h=700&w=1066&sz=76&tbnid=Slv3ZVgr84IXlM:&tbnh=79&tbnw=120&zoom=1&usg=__Mrv-E019a2_zYEMCG90QzT1UPrA=&docid=a9F7v2wF75uS8M&sa=X&ei=-_S-UYCQE8LPtQbfxYCYAQ&sqi=2&ved=0CC8Q9QEwAQ&dur=392