259,420 views
Support Cycling Culture – https://yoomoney.ru/to/410017261954004 A team of cyclists from the Polytechnic University created a bottom bracket gearbox that will help solve the problems of classic transmissions – frequent maintenance, easy breakage, fear of water and dirt. VK group of guys – https://vk.com/bicycle_gearbox My Instagram – / lasenkodmitry Join the VK group, you will find even more videos, discussions, voting and backstages: https://vk.com/velokultura 00:00 Introduction 02:42 About the project 03:48 Pinoin 04:19 First version of the box 04:39 Support 06:01 Gear shifting principle 06:35 Prototype 07:57 Straps 09:24 Subframe 10:20 Swinging box 11:30 Shifters 12:05 Electronic gear shifting 13:34 Chain or Belt? 14:34 Printing 15:05 Crowdfunding