Originally Posted by
Choke
I have a TA crank with their current production rings (30/46) and I am using a 9sp chain. It shifts like they were made for each other.
Same here. I use a vintage 52 and 42T ring and a modern 26T and they work perfectly fine with my 9-speed 11-34 cassette and chain with friction shifting.
The main advantage of using some of the modern rings like VO offers is that they are pinned and ramped, which works smoother when using indexed shifting.
EDIT: Modern cranks in 50.4mm BCD