Not sure if this is the right place to post, sorry if not. I bought a used Novara Randonee and quickly found it came with a non-stock wheelset. Instead of the 700c wheels and cassette it had 27" wheels with a 6 speed freewheel. It has RSX brifters and I'm hoping to get a freewheel or cassette that matches the shifters (either 7 or 8 speed). The problem is that I have no idea of how to determine how many "speeds" the bike was initially. Is there a simple way to do this? This is my first bike with STI shifting and it's pretty confusing to me.
Here is a pic: