nigsy

Hi;
First post - I've just upgraded from a Taxc flow to a Kickr Core. I have a Specialized Roubaix with a 10 speed shimano rear cassette to go on the trainer but wondered about just sticking an 11 speed cassette on instead, which would match my normal road bike.
I'm thinking as I'm only fitting the cassette straight onto the trainer I don't need to worry about hubs being incompatible, and maybe need to change the chain; but can I get away without changing shifters or the rear derailleur?

unterhausen

Welcome to the forum.

I'm a bit confused by your post. Just to clarify, if you are putting a 10 speed Specialized Roubaix on your trainer, then the trainer needs a 10 speed cassette. If you want to put the regular bike on that is 11 speed, you need an 11 speed cassette. The Roubaix with 10 speed is not going to work with an 11 speed cassette without changing shifters.

Does the core come with a cassette? If it doesn't and you want to put the 10 speed cassette on there, they likely gave you a 1.8mm spacer

nigsy

Hi;
You're not confused....you're spot on.
My spare bike (the one going on the Kickr) has a 10 speed cassette which I have put on the trainer; was just thinking about putting an 11 speed cassette on instead. I was hoping I would be able to just switch cassettes so cheers for confirming.

Thanks,

hayden52

Yes, you can just change cassettes, but you will have to install the spacer when you put the 10 speed cassette on the trainer.

spelger

no. you cannot just change cassettes. if you have a 10 speed shifter you need a 10 speed cassette. if you have an 11 speed shifter you need an 11 speed cassette. when i bought my kicker i needed to remove the 11 speed cassette and replace it with an 8 speed cassette because i have an 8 speed shifter. it really is that simple.

tempocyclist

I think I've read this right, but correct me if I'm wrong: You have a 10-speed bike, but want to put an 11-speed cassette on your trainer to use with that bike?

If so, then no. You can't do that. Your bike is 10-speed so will only shift 10 gears, not 11. Plus the 11-speed cassette cog spacing is different so it wouldn't even shift correctly. You'd need 11-speed shifters and rear derailleur.

But yes, hubs are compatible. You could pop an 11-speed cassette on the KICKR no problem (minus the 10-speed spacer) then use your 11-speed bike on there.

unterhausen

Did anyone read the second and third post in this thread?

spelger

maybe i am missing something...what is your point?

unterhausen

I told him what he needed to know and he confirmed that he understood. Then the next post was just wrong and the next two posts just repeated what I said in post 2.

tempocyclist

And your last two posts added even less to this thread... 😉

nigsy

And just to finish the thread....

I've gone with the original 10 speed cassette and a spacer. All setup and working good.

Thanks all for your help.

unterhausen

Thanks for letting us know

spelger

usually when i do a search for an answer to a question i like to have multiple responses saying essentially the same thing. it is like positive confirmation for me. especially when there is an incorrect answer like the one above that is wrong.

anyway, glad the OP got it figured out.

unterhausen

I guess I was just in a mood. Probably more people will answer in the future while the OP is happily (or unhappily) riding his trainer.