Sprocket is the toothed wheel that drives the track chain around the undercarriage. We bolt it to the final drive so its teeth mesh perfectly with the chain links, pulling the track as we move. Made from strong steel, it handles heavy loads and resists wear. If the teeth get rounded, we replace it to avoid chain slipping. It’s like the gears on a bicycle that make the wheel turn. Keep it clean from mud and grit for smooth rides.