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：12速
主要材料：铝合金
导板材料：铁
导板长度：加长腿
最大兼容齿数：11T-52T
阻尼系统：无
颜色：黑色
重量：308克
