[ddkto]

I suppose the technically correct term would be reinforced concrete bike

[cptskippy]

I would say "I covered a bike in concrete" would be the most accurate title.

[stingrae]

to be fair, large amounts of the frame are not just merely covered in concrete

[cptskippy]

Yes, and the entire thing is either reinforced with rebar or structurally dependent on actual bicycle parts. You could argue that the rebar reinforcements, if welded together, would make a sufficient frame and the concrete is primarily acting as a bonding agent.