Um I Have A Question About Rims And Tires

[hondahookup]

i have a 2000 honda cr-v. it has 16 inch wheels as factory. i want to lower it 2-3 inches. but after i do this i want to put 20 inch rims with low pros on.... but i dont know what any of the numbers on the rims and tires mean, so i dont know wut to look for....can anyone please help me with that....

[memyselfai]

The first number on a tire is the width. The second is the height of the sidewalls and the third is the radius.
So a 245/60/18 tire is going to be more low profile than a 245/80/18 tire but they will both fit the same rim.
When you lower your vehicle you have to make sure that the 20's will not be rubbing your inner fender walls, and this includes when turning.

[vansterdam]

That explanation is a bit off. The middle number is called the aspect ratio. The sidewall height = (aspect ratio)% x treadwidth. So a 205/75R15 has a sidewall that is 75% of 205mm. Here's a good tire calculator that shows tire size specs. Also here's a wheel offset calculator that shows how changing the wheel width and offset changes the wheel positioning. If you are not familiar with tire & wheel sizing, you should bring your vehicle to a good shop that can test fit wheels if necessary. Most online wheel shops would be knowledgeable on what fits too.

[Tony the Tiger]

If you are not familiar with tire sizing, matching overall tire diameters, etc.. don't even try to buy rims and tires yourself... There are also rim widths and offsets, etc.. You should always go to a local wheel/tire store and they could easily find you a good size of tires and wheels regardless what rims you go with.