Use an 11-34 cassette assuming it'll work with everything else you have, otherwise you're looking at getting the freehub or cassette machined, which probably isn't worth it for those wheels.
My bike is 11 speed. R8000. I want to recycle an old wheel I have and use it on the turbo. Would an 11-28 work? Whats different with an 11-34. Assume just won't use the 34. Anything changed with the spacing between the rings?
Use an 11-34 cassette assuming it'll work with everything else you have, otherwise you're looking at getting the freehub or cassette machined, which probably isn't worth it for those wheels.