http://www.raceramps.com/

Ooh, I don't think I could trust plastic ramps.

When they are tested and rated at more than your entire car weighs, you would. They have more structure and better design than the old school metal ones.

I own both and am trying to get rid of my old metal ramps.

I use the same ramps for both of my cars. The Zilla has trouble with the lower scoops now, but I just use 2x6 scrap to get them to clear.

The reason I am skeptical is because plastic typically degrades and becomes brittle quicker than metal. I wouldn't want to be under the car 5 years from now and have the thing split in two. Maybe it'* nothing to worry about, but I'm always nervous about getting under the car.

I understand your concerns. I'd suggest following the first link I posted and going to the manufacturers website. They most likely address aging etc in their testing that is required to sell such a product.

never will i ever trust plastic ramps. even though they are "stronger" and "better constructed" its just the thought that it only plastic between me and my car. i used a jack and jack stands myself.

I find that funny, because there was probably more testing of those plastic ramps than evaluation of the welds on the jack stand.

We have some huge ol metal ramps, without a terribly large stop at the end, never used em on my car, but we did with other cars before, and one thing we did was some wood infront of them, it seemed to help transitions.

I'm poor...concrete blocks and a couple 2x8s with some support in the middle, and a couple jackstands for safe measure.