Seat post angles for tri

Bman

Ok, so heres a question for the guys who know bike fitting and angles etc, out of general interest.

I'm on a road bike and have spotted a seat post that "positions the saddle further forward, in the same way as a steeper seat tube angle, making for a more powerful aerodynamic position. This unique Carbon seatpost effectively changes a 73 degree seat tube angle frame to 78 degree to move the rider forward by up to 38 mm"

So besides being a lot of money for a seatpost, is this actually going to work, assuming you get the rest of the setup right? And are we talking about better aero position (as I though that was mainly down to position on the bars), or being in a position which saves the legs a bit more for the run afterwards?

Just a thought as I cant see myself getting a tri bike for a while longer *sigh*. Thanks.

TRIumphant

I've looked at one of these previously thinking they would be the easy answer to not buying a Tri bike, but never actually splashed the cash to get one. Someone else has said that you can just turn your existing seatpost around, and then re-install the saddle, to a similar effect, at no cost.

hussler.

Be careful changing seat post angle on a road bike too much..... they have a different fork angle, top tube length, wheelbase etc..... it may completely throw the handling of the bike out and you may injure yourself too.

Zacnici

As Hussler says be very careful!

Have a read of this, there is a lot to take in but it makes an interesting read:
http://www.slowtwitch.com/mainheadings/ ... kefit.html

Then just for comparison have a look at the dimensions on the road bike here:
http://www.wiggle.co.uk/p/cycle/7/Focus ... 360037586/
Compared to the Tri bike here:
http://www.wiggle.co.uk/p/cycle/7/Focus ... 360037593/

Bit unscientific but you get the drift

My own two penneth (for those old enough to remember that expression) go Tri bike if you can afford - lets face it not many of us can - we're addicted - more bling please

nivagh

...also 38mm is a big forward movement - you may need to buy a new stem as you are effectively shortening your top tube by the same amount!

Bman

Thanks guys, yeah these are all the things I was thinking I would have to consider. No quick and easy solution to these kinda things I guess. Time to forget the gear for a while and focus on the engine methinks!