Do I need to replace the wheel speed sensor or ABS ring?

The assembly includes the ABS ring and sensor mounting surface. If your existing sensor is damaged, you'll need a new one; if it's good, you can reuse it. Inspect the old sensor before install.

What hardware do I need to bolt this on?

You'll need the original lug nuts and wheel fasteners. Axle nut specifications and torque values are in your vehicle service manual—don't skip that step, as bearing preload matters.

Can I install this myself with basic hand tools?

Yes, if you're comfortable removing a wheel, unbolting the caliper, and pressing out the old hub. A socket set, brake tools, and a press or hammer are the main needs. If you've never done it, a shop lift makes the job cleaner.