I have a Shimano R500 rear wheel that I have been using as a turbo wheel.
I have sold my turbo bike and wanted to fit this to my current road bike for turbo sessions.
My old turbo bike was 10 speed and my current road bike is 11 speed.
The R500 is a 9/10 speed and the 11 speed cassette doesn’t fit.

What’s the easiest option to get this to work?

New wheel, sell old wheel?
Swap freehub, if so what do I need?
Run 10 speed cassette on 11 speed set-up (I doubt this would even work)?

Run an 11/34 11spd cassette, it’s what I’m doing on my old dura ace wheel.

What about dropping a cog from the cassette and spacing it to fit?
I’m not too concerned about a missing ration, but don’t want to be messing with limit screws etc to get it working?

The 11-34 is the next option if that fails though.