9 speed cassette from 10 speed hub to 11 speed hub

[geopat]

So I have got my lovely new Ultegra 6800 wheel set which appears not to have the 1.85 mm spacer included. I have raised this with Wiggle.

My caad8 is 9 speed and I will be transferring the cassette from the standard Maddux RS3.0 wheels to the Ultegra wheels. There appears to be a spacer on the cassette at the moment but I am unsure if it will just be a straight swap or are the RS3.0 hubs 10 speed therefore requiring a different sized spacer?

Thanks

 

[geopat]

Found the 1.85 mm spacer that came with the wheels so not an issue.