I have a Birdy GT. Let me clock 10 posts and I can attach pictures of my bike and the link to the double chainring Birdy.
The brand of the front derailleur is Shimano.
I had tried to upload a picture of the Birdy with dual chainring in my album. Can you check if you could see?
Originally Posted by
Jipe
What model of Birdy do you have ?
What is the brand of the front derailleur mount used for the conversion ?
You could maybe post some pictures of it.