Agree on #2 and if pressed I'd go with #1. I'd say #4 is probably also my second choice but the power lines distract, need to frame it better. #3 would be neat if, ironically, the sky wasn't so devoid of clouds. It's just a boring mass of blue. Bring the bike in from the extreme corner a little and get some detail in the rock undercut (evening or morning instead of harsh midday sun), it would be better.
I like a couple with the mural in the background but the bike doesn't draw the eye at all. Those would work better if you let the background blur with distance + telephoto or large aperture to work DOF. OTOH a couple work really well to highlight the art, like the last one.