Ultegra cassette upgrade?

[Flo]

Hi all..

I have a 2013 Madone 4.5 and I'm just wondering if an Ultegra 6800 11 speed cassette will go straight onto the standard Bontrager Race rim 10 speed hub/freewheel? I know the rear mech and levers need to be 11 speed as well..

Cheers,

Flo

[bianchi928]

Hi Flo,

I don't think so (although I'm happy to be corrected and learn something as well) I know you can put a 10 speed cassette onto an 11 speed hub with a spacer but don't think you can go 11sp on a 10sp hub.