Public vote on a proposal for sub-forums within the Classifieds forum

and this would help with the latter while having minimal effect on the latter former.

Exactly.

Would love a structured way of having bike/frame sizes added.

That's something that is in my work for Microcosm. If all I want is a 59cm bike or frame, then just show me that (and optionally 1cm up and down).

But that's way beyond the scope of this debate.