I'm a bike owner, but I've done this as an alternative to the $4k (!) treadmill. I have a ~$900 treadmill with a tablet in place of the screen. It's not anywher

I'm a bike owner, but I've done this as an alternative to the $4k (!) treadmill. I have a ~$900 treadmill with a tablet in place of the screen. It's not anywhere near as nice and you miss out on the leaderboard (a great motivator to push yourself), but I find it's a "good enough" option for my non-riding workouts.