It is suggested by manufacturers and tire professionals to inflate 20 inch tires to 38 to 40 pounds per square inch. Under or over inflating creates uneven wear and safety factors.
275 60 20
If you READ the SIDE of the TIRE, it will be written on it.
what is the correct tire pressure for hankook tires, 265/35r22?
275/55/20
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/.
20 inch wheels are the largest size wheels that will fit into a 1990 Suzuki. A wheel larger than 20 inches will get on the fender well.
I have a 94' z28 sitting on 20" d'vinci havoc Black. It all depends on the tire size... my tire size are 245/35/20 and they really close to touching.
A 20 inch tire.
The psi amount will be listed on the inside of your car door. You do not want to put more air into your tire than what is listed.
I suggest you go to Tire Rack. You will have to go with a tire with a very small sidewall. Probably a 45 series tire.
Read your question. It makes no sense at all. Fitting a wheel on a wheel is impossible. What are you wanting to know? Me thinks you may be asking if you can install 20 " wheels on a vehicle that came with 17" wheels. The answer would be yes, with the correct size tire.
The most common problem with whacky wheels is that they are not mounted and balanced properly...go to a tire shop and get them balanced them mount them