I think your best bet is probably a general indoor cycling entry. It's hard to know for sure if the calories burned will be correct unless you're wearing a heart rate monitor, but it's probably the best guess you have available in the tracker.
Sorry I'm not more help!
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford
"No matter how slow you go, you are still lapping everybody on the couch."