Double chainring


Esteemed Pedelecer
Apr 5, 2014
My Haibike sDuro hardseven can be fitted with a double chainring and I would like to do this
I would like to add a larger chainring alongside the existing one if that’s possible
I have drawn a blank when trying to source the parts online
I searched this forum and someone asked about this a few years ago but there’s no info on a supplier of the parts
Can anyone point me in the right direction