WOW. Is this your first time modeling something like this? As in based so heavily on modifiers? If so, wow.
This is a fantastic wheel. It immediately makes me think of WWII-era Jeep wheels. The details are spot on and I appreciate you showing the base mesh of each piece (without modifiers)! You killed the assignment: A grade.
No doubt it was a laborious 4 hours, but I’d bet you learned a lot about the workflow and could do it again in half the time.