Swap turns on a fast section of L'Étape Australia with tour de France winner Chris Froome. TIP. This is a fast ride. FulGaz doesn't simulate drafting, so even Chris would have to work very hard to keep up in FulGaz. To simulate drafting, drop your aerodynamic drag number by 25%. EG. If you're on the default .40, drop it to .30. Don't see it as cheating, think of it as creating a more realistic simulation!