Для детей возрастом 12 лет опорное колесо шоссейный велосипед MTB руководство Подшипник керамика электрической части велосипеда керамики задний переключатель Прямая поставка от

Specification:12T

Weight: approx 11.5g

Material :AL7075-T6 CNC machined

Installation dimension:6MM/5MM/4MM

Bearing :ceramic bearing 

Color: black ,red ,blue,gold,silver

Feature:

it is cnc machined by AL 7075-T6 round rod ,finished machined by diamond cutter,with diamond metal texture and good abrasion resistance index , it adopts imported Japanese steel bearing,rotating without  resistance ,it greatly decreased frictional resistance,and increased cycling efficiency, the design inreased bike derailleur shifting speed ,it causes no noice when shifting speed k and prevent bike chain falling .

Package:

1 pc 12T guide pully