front derailer type on spark 30

[werner J]

Thanks gents for helping me on my previous Q.

 

I want to by a front derailer to fit a 9 speed system, on my 2011 spark 30 tha is still coming form oversees.

 

Now I'm not up to date with all the types, (low arm, high arm, etc etc)

 

What will fit my fram and system?

 

Thanks!

 

Werner