Tires: how to put tread on my nearly bald tires, bald tires, viable technique

Question
how can i put tread on my nearly bald tires so i can use them some more until i can replace them

Answer
Todd,

I am sorry, but the only viable technique is to retread them - and for practical purposes the process is almost as expensive as new tires and you have to remove them from the rims to do it.  That means you are going to have to purchase tires sooner.

However, if you inflate your tires to 5 psi above the placard, and drive gently, and choose routes where you drive more or less in a straight line (no sharp corners) you can obtain more mileage than the alternatives.