Gentlemen (and ladies, of course),
I have been getting a few questions lately about the assorted types of wheel construction materials and techniques asking which is the best or strongest. I decided to put together a basic guide for the most common differences between the various metal-working processes. We will start with the plain jane steel wheel.

Steel Wheel
How it's made: Steel sheets are produced and stamped into the wheel mold.
Why it's good: Low cost option.
Why it isn't: Subject to rust. Not a refined metal so can be damaged more easily than other types. Can experience failure if driving aggressively on them. Let's admit it - it's visually unappealing.

Gravity Cast Wheel
How it's made: Liquefied aluminum is poured into a mold with nothing but the pull of the earth to fill the cast.
Why it's good:
Another good cost option for a lot more style. Can be used on a variety of applications even light autocrossing. Lighter than steel.
Why it's not: Not the strongest production process but a step up from steel.

Pressurized Cast Wheel
How it's made: Same as other above except the metal is put under pressure while it cools to work out the imperfections.
Why it's good: Lighter weight. Stronger metal. Great for racing and aggressive driving.
Why it's not: None. This is the best quality cast wheel.

Forged Wheel
How it's made: Using an extreme amount of pressure, a solid piece of aluminum is forced between forging dies.
Why it's good: The sheer density causes this to be the strongest type of wheel available. It is the lightest option as well.
Why it's not: Price. It costs a lot to get the best.

Tire Rack has a bunch of new wheels coming for Spring. I will drop a thread whenever a notable fitment or wheel style comes in so you all have the newest information. Let me know if you have questions!