I don't know the song. I google the lyric, it might be a reference to an old form of torture. Long ago, a wheel was used to break a persons bones, to cause them pain. 'Breaking' a person using torture.
A famous man was once quoted in saying 'who breaks a butterfly on a wheel', meaning 'how pointless it is to use such a strong form of force on something so delicate and helpless'
so perhaps the meaning of the lyric is something like 'something so strong, so completely overpowering, can destroy us'.
Honestly, I find coldplays lyrics a little too abstract. Don't search too much for meaning, they often just put ideas and words together that sound good, that have a pleasing line of thought, without much deep meaning.Therefore, the meaning is what you bring to it yourself :)