I'm prolly late but, I love the concept and your colors. My crit is a really simple one, the whole image needs to be lightened up a bit. The tires get lost in all the darks. That's really all that this peice needs.
You do good work sir. Anything that I can add to help out is the least I can do. By the way, I didn't know you were guyanese. I'm half guyanese. It's a funny coincedence. Do yer relatives still have their accents? Mine all do. The holidays are hilarious when we all get together.