Based on the wear and tear of general parts (chain, cassette, tires, bartape), and rounded up, I figure at: 6 cents per mile.

That doesn't include periodically replacing wheels from brake pad wear, or brake pads. No idea how long they'll last. Still on my first set at 20,000 miles. I also didn't figure in tubes as there doesn't seem to be any sort of meaningful average. Nor did I figure in bars/gels/etc. as I need to eat anyway.