Over the winter of 2015/2016 I was taking a computrainer class and after a few months I left the course in May with an FTP of 255W. I didn’t ride a lot after July 2016 and recently did the 20 minute FTP test on Zwft and had a pretty tough time keeping at an average of 155W. With minimal fitness over 5 months could my FTP have dropped 100W? I joined a Zwift organized class C race and couldn’t keep up, felt like I was working way to hard even in the flats. I’ve got the Wahoo Kickr Snap and do a spindown almost every time. What am I doing wrong? Is it my setup, ie. is my tire to tight to the kickr? Or have I just gotten that soft.