Maybe. But it doesn't solve my problem. I think I don't mind having the key on my keyring. I'm just concerned about losing the key or my entire keyring and not being able to remove my wheels, especially when I get a flat on the road.

If carrying the key with my keys proves to be burdensome, then I'll look into hiding it on my bike. Or maybe I'll stash the key in my tool bag. I attach my tool bag to my saddle and move it from bike to bike. I normally take the bag with me when I lock it up, so that should work.