I think you lot should recognise what these are meant to be. They both swing with a comparable range of movement as well as being 'sprung' to return to the correct position.
Could prove to be a bit tricky. The chain would be very fragile and certainly isn't designed to be derail-able and no idea what I could use for front chainrings.
I think you lot should recognise what these are meant to be. They both swing with a comparable range of movement as well as being 'sprung' to return to the correct position.