How can I re-define data grid columns min-width

Hi team! 

I need to have columns in the data grid with 60px width and no more than that. 
The minimum currently allowed I think is 114px. 
Setting a smaller width in grid code is not working, no matter the value I set to the column width, it shows with 114px width.

Also if final user tries to reduce the width dragging the column border, is stuck at that predefined min value. 

Any idea how to redefine that? is it possible?

Thanks!