Originally Posted by
HTupolev
I don't understand how you can be committed to a cassette while having no idea which of several wildly different chainring arrangements you're going use. These are choices that influence the consequences of each other.
You're right, the question makes no sense.
Just simple math shows that--if you have a 28t chain ring, it's a totally different question whether you want a 36t cog vs. if you only have a 38 chain ring.