Running and cycling are a bit different.
While you may have leg/lung power for running, you will be using different muscles pedaling. Your butt will likely take a beating unless get in some good and fairly long practice rides.
If you are planning 100 miles a day you best start off by trying to ride a few 50 milers first.
Could you run a full marathon every day for 2 1/2 weeks? That's what cycling for 100 miles a day will be like.
Is it doable? Certainly.