回复：首先你沒有工具﹐經驗。換起來也不貴﹐生命可貴啊。

i do not know what kind of tools required for change the drum break, but if for the disc break all you need is a c-clamp, anti squeral compound, a jack, a new pair of break pads, some break system cleaning. I did changed my front break month ago, and this was my first time, before i have the same thought with you. worry about the safety, but after i check the book, i find out this is a very easy job,and if you followed it step by step. but, i have the same problem, i do not know how to change the drum break.