Установка бонок на раму под флягодержатель с нуля

I show how to add bottle cage mounts to a bike frame that doesn't have braze-ons or other mountings. Such as vintage bicycles or maybe a bike that only has mounts for one bottle cage, but you want to add a second bottle cage. This is done by drilling the frame and installing rivnuts (rivet nuts). This is for steel or aluminum frames. Do not do this on a carbon fiber frame. You assume all responsibility and risk if you choose to do this. By the way, you may want to overhaul the bottom bracket after doing th