两个前轮轱轳上很多油迹，是不是刹车油漏汽？

[TTN]

两个前轮轱轳上很多油迹，像是油蒸汽熏的，是不是刹车油漏汽？

 

[风的颜色]

是刹车片磨下来的残渣加上一些杂质。

 

[ccc]

是刹车片磨下来的残渣加上一些杂质。

This makes sense.

I was trying to understand the problem, but didn't get it.

Yeah, there is also the worn-off stuff/powder from tires, especially new tires.