What is a "Synthetic" surface?

[Holland Hacker]

Listening to Hamerle and Steve on ATR talking about Hysterical lady and her lack of ability on Synthetic Surfaces I began to wonder what the definition of a Synthetic surface is.

I know there are several different varities Poly, Cushion, Tapeta and Pro-Ride. Over the last few days it has come out that the new Pro-Ride at SA is 87% dirt and only 13% synthetic. To me this begs the question a what point does track go from being a dirt to a synthetic surface. Obviously it is womerwhere between 0% and 13% synthetic material.

Does anybody know what percent of synthetic material must be present for a track to be considered synthetic?

[cowgirlintexas]

Looks like you have stumped everyone with your question...

Personally, I think that if any foreign substance is added to dirt no matter the percentage would change it from a "true" dirt surface.

[The Bid]

Synthetic surfaces have done about enough for this game. Hopefully in a few years all the morons who installed them will be back to dirt and enjoying the game again.