very nice, could be a top 10... i live the negative space you use here, and the way the wheels break into the space. perhaps the depth of field could have been increased a tad to make both wheels appear sharp - this image seems to want to be sharp all the way through to me.
This looks like a big chunk of metal. I presume that it is. It has an iconic look perched up high like that, as if it is expecting to be worshipped. On the other hand, it may just roll down the slope. The shot is very good anyway.