light navi by youngsuk kim from korea

Recently, Bicycle lifesyle that makes people healthy and saves our enviroment has come into the spotlight.
From general road bikes Bicycle, mountain bike, trick bikes for BMX, a cute MINIVELO to the FIXIE that
has one single-gear, bicycle riders are increasing exponentially.
on the otherHdnd , there are lacking in for peolpe whod need tto be safe, in case of our country,