That's a common and frustrating problem! Dragging a heavy bin across rough pavement is a surefire way to wear out the bottom. Here are some natural, practical solutions I've found work well.
First, the simplest fix is to lift, don't drag. It sounds obvious, but getting a good grip and lifting the bin slightly as you move it makes the biggest difference. If it's too heavy, consider a two-wheeled dolly or a specialized trash bin caddy with larger wheels designed for rolling.
For a more permanent solution, add a protective layer. You can attach adhesive furniture pads or heavy-duty felt pads to the bottom corners. For full coverage, cut a piece of thick rubber matting (like a horse stall mat or an old floor mat) to size and secure it with strong outdoor adhesive. This creates a durable, drag-resistant skid plate.
Another great trick is to upgrade the wheels. If your bin has small, hard plastic wheels, see if you can replace them with larger, rubberized wheels designed for smoother rolling over uneven surfaces.
Finally, mind the surface. If you have a consistent dragging path, see if you can create a smooth runway, like a couple of flat pavers from your back door to the curb. Regular cleaning of the bin's bottom to remove grit and debris also prevents abrasive damage.
A little prevention saves you from a cracked bin and a messy cleanup later!