I don't really like the way clip on's look on classic road bikes ......unless they use bull horns with them or use the integrated aero bars like I have. Heres my take from another thread:


"I have two Centurion Ironman set up as road bikes and two set up as tri bikes both tr bikes use the original scott dh aero bars. When they first came out even the triathlon pros didn't want to use them. But a couple of second tier pros did and went on a one or two month unbeaten streak. So naturally the other pros soon followed and then finally us age groupers. We saw the pros using them and bam, we had to have them. I grew up on them so to speak so they're totally comfortable for me. They look funny at first,then they look beautiful in their ingenuity. The most successful triathlete to use them was Mike Pigg. He would sit at the nose tip of the saddle and hammer like no one else on the planet. He used regular italian geometry bikes, but in a way invented his own tri geometry. I'll explain the best I can. If you're riding your regular road bike. If you were to put your elbows on the top bar of you handlebars, you body will be way too far forward. Well that's exactly what the aero bars would do, so you move your butt forward to compensate. So triathletes started moving their saddles forward, when that wasn't enough they reversed their seatpost. That's when they invented forward seatpost. They discovered a few added benefits to the forward position along the way : 1. It simulated running more so therefore when they got off the bike they were able to transition to the running motion quicker. 2. It made you use your quads more, and thereby create much more power.
Everyone knows the benefits to being more aero but some things that triathletes discovered that made these better than riding the drops or using bull horn handlebars : 1. Putting your elbows closer together, created a wedge that really helped you slice thru the wind. 2. Being stretched out in the prone position (basically lying down) allowed you to rest somewhat and work at a lower heartrate. Which in turn kept you fresher for the run.3. Your arms being stretched out allowed your lungs to expand more easily than being in the drops.
Although I moved my saddle forward, Personally I never used a forward seatpost. I like the different positions I can use by not being too far forward. I can ride the tops,I can ride the drops,and I can ride the hoods, and when I really want to go, I scoot a little more forward in the saddle. They're my favorite and the original. This is what I'm talking about.
Sidenote : Back in the day I only had one bike and it had these bars. But I wouldn't ride in the aero position when I rode with the bike club. Not because it was dangerous or I wasn't stable but because I felt like I was cheating."