GARMIN TACX FLUX S SMART Smart Trainer 11-speed (105) sprocket Includes TACX SKYLINER Compatible cassettes: Shimano and SRAM: 8-11 speed. Compatible axles: 130mm, 135mm, 142x12mm, 148x12mm There is some dirt from use. *The mat underneath is not included. I have another smart trainer and don't use this one much, so I'm offering it to someone. I will pack it in the original box and ship it. Thank you for your understanding.