The Wahoo KICKR CORE is a compact trainer that provides a realistic riding experience. - Brand: Wahoo - Model Name: KICKR CORE - Features: Trainer that provides a realistic riding experience - Design: Compact and stable structure - Compatibility: Compatible with many bicycles Thank you for viewing. I believe I purchased this in December 2018. I used it frequently during the COVID-19 pandemic, but I haven't used it much in the last few years, so I'm decluttering. It comes with an 11-speed cassette. The base has some rust, so it may not be suitable for those who are concerned about that.