The treads are stripped where you screw the maggage ball on. How do I fix that?

Slipping on snowy and icy roads in winter? Don't give up riding, just add some studs to an old pair of tires.
1. Either get a hold of some old bicycle tires that still have tread on them or buy a new pair.
2. Poke a pin through the thick tread part of the tire to measure its thickness.
3. Find some metal screws that are just a little bit longer than the thickness of the thickest rubber tread of the tires and have a tapering head so when screwed in fit flush with the rubber.
4. Drill holes through the treads in the tires smaller than the size of screws you have.
5. Screw the screws through the inside out in the tires until the are all the way through and sit flush with the inside of the tire.
6. Screw in all the screws making alternating patterns between the treads (ever other tread, every 2 treads, etc.) The more screws you use the longer it will take but in the end you will have better traction.
7. When you have completed screwing in all the screws wrap a piece of duct tape over the top of all the screws to protect your tube from them.
8. Place the tires back on the rips and pump up the tubes and enjoy!
***Be careful, the screws are sharp and will scratch or cut you! You definitely don't want to ride to close to someone or hit a pedestrian with your tires.