I don’t think it would be very good to use it without power. I’m not sure it would break anything, but I wouldn’t take the chance. I also don’t see the value of doing it there wouldn’t be any resistance.
I don’t know for sure but have to agree that it is probably not going to give a good workout/ resistance and may damage the unit. I wouldn’t do it to mine.
Just rode the Wildflower course on in this morning