A cheap set of 20 inch rims would not be that much worse than an expensive set of rims. The quality of the rims and brand would dictate the pricing range of the rims.
You might choose 16 inch rims over 17 inch rims because the cost would be lower with the smaller rim size. The cost of tires would also be less.
There are a number of different places where you can buy cheap 20 inch rims.I can personally recommend you try www.hubcap-tire-wheel.com/20-inch-wheels-rims.html or www.ozzytyres.com.au/20-inch-car-rims/.
Standard 15 inch rims will fit on a 2002 Chevy Silverado. They do not allow for as much room around the rotors like larger rims.
Chrome rims and discount tires with an attitude or some of the coolest truck rims, their products are just what you're looking for. Discountedwheelwarehouse website have the hottest styles in custom rims and cheap tire on the internet.
Walmart has a nice selection of rims. If you prefer to shop online for your new set of rims, tirerack.com has affordable rims and they have many positive reviews. Wheelstudio.com also has a good selection and offers free shipping in the U.S.
brakes are to big to fit 15 inch rims
No, 17 inch rims can not fit on 16 inch wheels.
cheap rims and tires is a good site
You can purchase rims for dirt cheap online from auction websites such as eBay. Alternatively, you can also get cheap rims online from classifieds such as Craigslist.
Why would you want to put 20 inch rims on an Altima? I can tell you that 18 inch rims worked.
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.