The tread on my gravel/hybrid bike is constantly picking up and throwing off small stuff. This means that as I ride, my wheels are continually balancing and unbalancing themselves depending on how much stuff is collected. It's an amazing feeling when I'm balanced - like a tailwind pops up suddenly. But then I lose the balance and it's like a head wind. I'm thinking about rigging some sort of scraper on the tire tread so when I feel an unbalance I can tweak it a bit as I ride.