Found the time.
I just tested this idea of the 11 speed cassette on a 10 speed hub. As long as I put a 1mm spacer on first and then pulled the 14t cog on my 12-25 11 speed cassette it seems to tighten up just fine. I didn't try every combination, but seems doable! Without the spacer it wouldn't tighten up on some combinations or if it tightened the spacing between the 1st and 2nd cogs was off. FWIW!
Sorry! I see what you are saying now. That's an interesting idea. I'll test it when I get a chance. Little chance right now though.
If we could do that we wouldn't have to worry about it at all. As far as I know the 11speed cassettes will not go on 10 speed hubs (Shimano).
Thanks for confirming this.
Do you know if it would give better results to pull a cog from an 11-speed cassette and run that on a 10-speed wheel? Has anyone compared the two setups?