Hi
I know its an oldish thread but i have the range extender and it fits to the seat post tube
There are bolts that go through the seat post tube that you undo
Hope this helps
John
Hello everyone from rainy Manchester in the Uk
Currently own an Orbea Vibe H30 and i love it
Helped me get out riding a lot more since i bought it
Hoping to get some tips on here about my bike and am looking forward to looking through the forum posts
John