I’ve worn the tread of my tires and was wondering what tires to buy?
really depends on the type of riding you do. and how much you want to spend. for cross country, there is everything from dry tires to mud tires, and everything in between. Ones with a continuous tread in the middle are better for using on the road if you don't want to give up mountain tires but use roads frequently. If you are usually on the road, I'd get some slicks or semi-slicks to reduce rolling resistance, and rotating mass. You can get tires for under $10 to well over $100 each, so determine the type of riding you'll be doing, and go from there for the level of quality. There are many different companies, but like anything, they make cheap ones and high end ones. The style of tire is more important than the manufacturer.