Saddle hight question

Hello.
I recently bought a Cube LTD pro 29 size 21.
In order to get a good fit i need to raise the saddle 2.4 cm away from the limit.
I have around 13 - 13.5 cm tube inside the frame.
I am kinda worried that it will break when i ride the bike, or is that me just worrying about nothing?
My weight is around 165 lbs.
Here is some photo of the seat tube:
http://imgur.com/a/xDkd9
I recently bought a Cube LTD pro 29 size 21.
In order to get a good fit i need to raise the saddle 2.4 cm away from the limit.
I have around 13 - 13.5 cm tube inside the frame.
I am kinda worried that it will break when i ride the bike, or is that me just worrying about nothing?

My weight is around 165 lbs.
Here is some photo of the seat tube:
http://imgur.com/a/xDkd9
0
Posts
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
Kona Process 134 viewtopic.php?f=10017&t=12994607
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
I still have a similar vintage Lava Dome frame hanging up in the shed
Duster
My Bianchi
More recent pic, with a correct seatpost, new stem and decent shifters, and experiment with SPDs.
Hopefully enough seatpost showing to freak Angus out.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
bob6397
Rose Pro-SL 2000 - Roadie
Looks like a five bar gate:
Mary had a little lamb and it was always gruntin,
She tied it to a five bar gate and kicked its little c+++t in.
jeez :roll:
You'll be fine as long as it's not over limit, where it's likely to damage the frame too. The seat post will bend before it breaks, which is exactly what mine did when I have it over limit on my old bike: