You can find 17 in tires for your trucks at any tire dealership that caters to big vehicles. As for a cheaper price try your local newspapers want ads or Craigslist.
From my own experience, tirerack.com is the best place/website for buying tires. Not only are the prices cheap and hard to compete with but they have tire prices listed on the site.
For any car parts or tires I always check the classifieds in my local area. After I log onto kijiji and/or craigslist and see if anyone is selling them for a good price. Searching the local scrapyard is beneficial as well.
I would say the best places to purchase 16.5 tires for a cheap price would be your local auto shops. They actually sell used tires that look like new for good prices. But if you want brand new tires you would have to check around in places liek Walmart that sell them.
I would look at your local dealer ship such as Tire Kingdom to find 35 inch tires for your car.
There are a variety of sites that sell cheap tyres like http://www.tiresavings.com/ and http://www.discountedwheelwarehouse.com/35_inch_Tires.cfm and http://www.directbuytire.com/category-s/471.htm.
Any tire shop can still order 16.5 inch tires.
Www.discountwheelwarehouse.com has good deals on large tires. Also, locally you can look for tires at www.bigbrandwheels.com which has brand name tires for low prices.
There are many places where you can find inexpensive car tires for a 2005 Chevy Cobalt. www.tires-easy.com is a great website, which sells cheap tires. Or, if you prefer to shop in person, Discount Tires is a very good store. i am looking for 4 235/75/16 inch tires for my 88 gmc sl sierra, 25oo series truck. full size, but no extended cab, 4-wheel drive.
When you are looking for 33 inch tires, l would recommend the comparison sites like ebay and amazon. Many tires companies have accounts, and customer feedback is useful in helping you to find the best deal on 33 inch tires.
You have several options when trying to find discounted rims and tires. There are many discount warehouse websites that you can use as well as auction site that will allow you to purchase discounted rims and tires. Local body shops maybe another place to shop cheaply.
It will depend on which rims will fit your car. Having 16 or 17 inch rims will have a significant jump in the price of your tires.
15 inch tires will not fit on 16 inch rims.15 inch tires will not fit on 16 inch rims.