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.