You are required to have 2 mirrors so that was illegal.
I took my mirror off my door and bolted it to my fender, so that one plus my rear view makes 2.
To be more specific on that law; you must have 2 mirrors, one of them must be the drivers side mirror.
Davez Offroad has some nice tube door mirrors and cupholder
![](http://www.davezoffroadperformance.com/forum/files/picture_871_265.jpg)