I'm hoping I can replace my freewheel to improve shifting performance. I don't know much about freewheel compatibility so I figure I will ask the experts.
Right now I have an Atom 5 speed "corncob" with a Campy NR RD and crank. I am assuming that my poor shifts are a 2 part problem of freewheel wear and design. It is my understanding that there are great vintage freewheels from suntour, sachs and others but I would prefer something new and easy to find.
It seems that Shimano and IRD are the most promising choices. What is the maximum size that the NR derailleur can handle? With 126mm rear spacing, can I fit a 6 or 7 speed compact freewheel with altering anything else? Is IRD's cost all bling factor or is there a performance difference, have there QC problems been taken care of?
I realize that shifting problems can also be caused by improper chain length. I am having a little trouble gauging whether mine is correct so I will take a picture with the chain in big-big and small-small. It may be a technique learning curve too, this is not my first friction shifting bike but it is my first with downtube shifters.
Thanks in advance for the advice.
EDIT: as promised, here are the pics.
Removed old picture, new picture is further down in the thread
The freewheel in question: