Do they make much difference? Just curious really after doing my first ever TT recently (the post is below if you're in the race forum.) I was surrounded by very expensive looking bikes, skinsuits and those streamlined "alien" helmet things. So, what would a guesstimate time saving be if I was on one of those instead of my trusty SCR3.0 would you think? Its purely a hypothetical question, I need to lose a lot of weight and pump out a lot more power which I can do perfectly well on the Giant before I could even justify thinking about a new, lighter bike. But, just hypothetically then, any ideas............?