Hello, I bought this tacx where a standard free hub T-2875-01 is installed. I bought the same cassette as i got on my bike Shimano Ultegra CS-R8101 11-34 (12 speed). The cassette does not fit on the free hub, despite reading on several places it should any explanation why?
The "not fit" means, the 11th sprocket cannot be pushed low enough, which means when adding the 12th, it's too high to put the end cap. Thanks vm.

Question

Hello, I bought this tacx where a standard free hub T-2875-01 is installed. I bought the same cassette as i got on my bike Shimano Ultegra CS-R8101  11-34 (12 speed). The cassette  does not fit on the free hub, despite reading on several places it should any explanation why? 
The "not fit" means, the 11th sprocket cannot be pushed low enough, which means when adding the 12th, it's too high to put the end cap. Thanks vm.

Answer

Hello,
I have a 9-speed cassette. Everything fits there. I suspect the freehub body of a 9-speed cassette is different from that for 12-speed.
You simply have to install a different freehub body. After that it should work.

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Question about Tacx Flux 2 Smart T2980