Im interested in this too.

I have bottle holders and a saddle bag behind my seat. I have succumbed to using clip on battery operated lights attached to the bag behind the seat. In the front I use a high powered usb light attached to the bottom of my aero bars

Neither is ideal but they work

I've got pictures, but not on me. If you have the 2nd rear hole free you can use that as one of your mounting points. The seat stays are problematic because you can't get the light to point straight back. What I ended up doing was mounting it on the rear brake ferrul. Works well there. The best option I found though is mounting the hotshot and the cherry bomb on the rear wing that I have.

Not USB, but to give you an idea of a possible solution I use one of these rear lights on my P3 aero seatpost and extend the rubber loop by pinching a hair tie off my daughter. Works a treat.

On my P2C:


I use this on the seat post: http://www.amazon.com/...01?ie=UTF8&psc=1
I secured it with a zip tie over the rubber strap because the rubber thingy is pretty stretched out and tends to unhook. I lost one of these already.

On the front I have this: http://www.amazon.com/...s_product_refresh_T1
I couldn't use the mount on my base bar, it's a 42cm and there was no place to clamp it in the stem area. I ended up using zip ties on this one too and it sits between the arm pad and stem.

They both work really well, I've done 4h+ in the dark and the batteries held up well. I use the intermittent on the back and the pulse mode on the front.

Yes - looking for solutions for rear lights on aero seat-posts in general.

I have round so I am OK, but my wife has an aero post on her Cervelo S3 - few if any of the better options will work.

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Steve Fleck @stevefleck | Blog

I have the hotshot, and no it will not work with aero seat posts.

Why don't you just put the hotshot down by the wheel and away from the seat post?

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