Elite Suito

[Sy74]

Hi All I have a question you may be able to help me with please, Winter is coming and I would like to continue my weekly rides indoors on zwift and everywhere I read the Suito has great reviews. So if I buy the smart turbo I know it comes with a cassette that means you can use an 9,10 & 11 speed bike but at the moment I only have an 8 ( 16 ) speed bike so can i get it to fit the suito ?? I'm going to buy a new bike but that's not until next year and i can't afford a bike and smart trainer at the moment, I've read some comments on here and there's a mention about "spacers".

Thanks for taking your time to read this and hopefully thank you for your input