Save seatpost length out of seat tube?

[Scalfred]

I am thinking of giving my back a little help when I ride my F600 and the Save seatpost seems to be a good idea but... not sure I have enough length out of the seat tube to make the Save flex work properly

Anyone could tell me the minimum length of seatpost I need out of the seat tube?

Thanks

[Scalfred]

Well... I didn't find the info on the web and apparently nobody knows here... I may go for a titanium seatpost instead.

[BoostN7]

Lower your tire pressure, and take a look at your bars.

[Flying_Scotsman]

How much tube do you have out at the moment?? I would suggest 200 - 250 is the minimum
You can have out??

The total length is 420mm and it changes shape half way up.

[eliflap]

you have to check seatpost and frame, both.

every seatpost has a minimun insert sign, normally 9-10-11-12 cm from the bottom

every frame requires a ... cm inside the seat tube to avoid failure. ( Flash requires 9 cm inside ).

mix and match these two values :-)


this is on Cannondale site but doesn't help so much:

http://media.cannondale.com/media/Ma...echnote_en.pdf

this is more helpful:

http://media.cannondale.com/media/F-..._126709_EN.pdf

check on page 7,8,9

[Scalfred]

I knew for the minimum insertion, actually, the missing info was the maximum insertion which is... on page 9, second link from Eliflap. It's for a 350mm long post but the flexing point doesn't change for a 420mm, the post is just longer to gain on the minimum insertion.

Result: the minimum lenght out of seat tube to make the Save work properly is somewhere between 18 and 19 cm... and I have 19,5 cm available. So it's supposed to work but I'll confirm later in a bike shop.

Thanks Flying_Scotsman and Eliflap.