I'm not an expert, so do some research, but it's probably a bit of a) you've trained yourself to burn fat more (a good thing) b) you're not exercising as strenously c) yes, if you ate you'd probably "perform better".
I'd recommend you to do your own research though.
But to add - yes, if you don't eat you will "bonk" on a long bike ride.
I'd recommend you to do your own research though.
But to add - yes, if you don't eat you will "bonk" on a long bike ride.