The wood shows plenty of neat detail, textures and tones. I am less convinced by your BG, would perhaps prefer something more uniform (such what is seen through the inside of the wheel.
Is this a paddle wheel of sorts? Simple, yet complicated all at once really - at least for my tiny brain! "Just" a wheel? I couldn't have designed this!
What helps me grow is to see your crop here. I don't know that I would have thought to not include the whole wheel. Yet, you've captured what appears to be the top two-thirds, and it's very nice.
