Road Cycling - Behind the seat water bottle holders.

I saw one of these and it looks extremely useful.

Does anyone have one, if so what brand?

Has anyone had one and disliked it, if so, why?

Is this "illegal" for any racing events?

Yeah. I was wondering about those too. It would seem more logical to have them as far as aerodynamics. I know that they are legal for triathalons so I guess they would be legal to road races too. There would be problems attaching it and being able to reach the bottles though, due to the relatively high seat placement by most road cyclists.

And the great temptation for other riders to swipe your bottles.
kev

ive done that before lol..

I thought the same about aerodynamics, so after some research bought the Minoura saddle-mounted dual-WB holder. I used it with 2 Velocity Velo cages on the back of a Selle Italia Flite Gel Ti saddle (note: doesn't mount on a San Marco Era).

The Minoura mount is lighter than some of the other things out there, (Velocity Seat Post Thing comes to mind) and holds the cages a little bit higher and closer to the seat, which suggested better aerodynamics to me...(it is also cheaper, $13 if I remember correctly. Velocity SPT is around $25)

...after using it a short while, though, I have to admit that am not comfortable with it. I've decided instead to use a Camelbak Classic...it holds more (70 oz, or 2 L) and isn't so detrimental to aerodynamics...and I've found that the convenience of having the water tube on my shoulder is better than having to reach down into the frame or behind your buttocks (twice) for a waterbottle.

Also:
this website suggests that keeping the cages on the frame is better for aerodynamics (http://www.analyticcycling.com/RiderAeroStudy.html) . ...I ignore this, though, because I really like the camelbak... (no, I'm not a Camelbak sales associate, but they have a good business, see? :) )

I had one that held two bidons when I cycled across Australia a couple of years back.

It was handy to have one cage in the normal position and the two extras behind me.

I don't keep it attached when I'm just riding around town.

Instead of that, I use this nylon(?) bottle holder with a mini carabiner on it which I hook on to the back of the seat for long rides.

I had a behind the seat water bottle holder and hated it because:

1) I mount the bike by swinging my leg over/behind the seat. The bottles get in the way.

2) When climbing long and/or steep hills I slide WAY back on the saddle. Again, the bottles got in the way.

Now I have a handlebar bag that holds two water bottles. I like it much better.

Campy had a bottle a few years ago which was aerodynamic. It was wider than a normal bottle but the same wide as a downtube. Dont know if they are still in production though.

I've chosen not to get one!!!

Seemed like a good idea, but I'll let experience tell me that it just doesn't work!!

Many years ago, racers used to mount their bidon cages on the handlebars.

I was riding a quick century in a paceline last year. A couple of guys had bottle carriers that held two bottles mounted behind their saddles... I guess it was the same kind of thing you're talking about. Anyhow, the line went over a pot hole and the both guys bottles popped out of the holders and landed on the pavement. Luckily, none went under anyones wheel.

I used to have a carrier in front of my handle bar that I used for extra water bottles, rain jacket etc. However I found the weight in front of the handlebars had a detrimental effect on the handling. I imagine this is why racers changed to frame mounted water bottles. Do aero bars havew the same effect on handling?