Ningbo Penk Intelligent Technology Co.,Ltd, Was founded in 1990'S, Specializing in producing bicycle and electric bicycle parts. The three main products are brake sets, Derailleur systems ,Pedals and more than 100 other related accessories
速度：2X11速
安装方向：左/右
主要材料：铝合金/树脂
拨杆方式：双向释放
可视挡位窗口：是
颜色：黑色
