If you're looking for cheap ATV tires, the best place to do your shopping is on the internet. There are several places that you can find good deals, or even wholesale pricing, on tires.
The first place is discount websites. These are sites like Amazon.com that carry all kinds of different products, or sites like Tires-Easy.com that specialize in tires and related products.
These websites often offer significant discounts off the list price for tire brands like Maxxis, Outlaw, Goodyear and Carlisle. And the internet makes it easy to shop around from one site to another - no more spending more in gas to drive from one place to another than you wind up saving.
Another good website for finding deals on ATV tires is eBay.com. Most people tend to think of collectibles and other weird stuff when it comes to eBay, but the fact is there are lots of big companies selling things through their website these days.
You can find brand new tires at a discount or sometimes slightly used tires for a lot cheaper than new ones on eBay. Lots of people sell spare parts they have lying around through the site. Someone who has upgraded their ATV or maybe wrecked it is happy to get something for their spare tires, and you get a good deal as well.
You can find various types of tires as well, from Super Swamper mud tires, to DOT approved street tires. The nice thing about shopping online is that there's really no limit to the brands and models of tires these websites can "stock." You will almost always find a better selection online than you will in your local off-road shop.
Of course, that's not to say that you can't find good deals locally as well. If you aren't in a rush to replace your tires - maybe it's the end of your riding season, for example - it pays to keep an eye out for sales. A lot of off-road dealers run sales at the beginning and the end of the season, so those are the best times to shop.
If you're not already, it pays to get signed up to receive flyers and ads from your favorite shops. They often send out "customer only" specials that you wouldn't see unless you're on their mailing list.