Alu Frame - Would a Carbon seatpsot make any difference?

[migrantwing]

My wife has a Giant Dash flat bar road bike with an alloy frame, carbon forks & carbon seat post.
Some time back she had to replace the seat post as it had started to delaminate. While she was waiting for the new one to arrive, the LBS loaned her an alloy one for a week or so.
She moaned like hell about how noticeable the difference in comfort was! I was glad when the new carbon post arrived.....

Just goes to show, eh!

 

[cyberknight]

My wife has a Giant Dash flat bar road bike with an alloy frame, carbon forks & carbon seat post.
Some time back she had to replace the seat post as it had started to delaminate. While she was waiting for the new one to arrive, the LBS loaned her an alloy one for a week or so.
She moaned like hell about how noticeable the difference in comfort was! I was glad when the new carbon post arrived.....

I just had to re paste my carbon post, it turned to a black sludge when i rubbed it in?

 

[Dirk]

I just had to re paste my carbon post, it turned to a black sludge when i rubbed it in?

Eh?

 

[cyberknight]

Eh?

my carbon post was creaking so I put some more carbon paste on it, rubbed it in and my hand was covered in what I guess is a mixture of paste and carbon powder that had come off the post .
I was wondering if it was a sign that the post isn't in the best condition, its hard to be coherent after maybe 4 hours sleep on night shift .

 

[Levo-Lon]

I asked this question with my ally RT58 and the concensus was No ,its a tube and rigid.

 

[Apollonius]

What you will get, unless you are very careful, is a permanently stuck carbon post in an alloy frame. Amazing bonding!

 

[migrantwing]

Aluminium and Carbon are at opposite ends of the periodic table, or something like that. This causes them to react against each other, hence causing the welding/bonding. That's the layman's version, I'm not a physicist Even things like Aluminium bottle cage bolts on Carbon frames; add Electroylte from a power drink and it will dissolve the Aluminium bolts over time.

Just remembered, it's called the Galvanic scale. Saw a video posted here recently and it is extremely informative regards Carbon and Aluminium.

 

[Ajax Bay]

Aluminium and Carbon are at opposite ends of the periodic table
. . . . Just remembered, it's called the Galvanic scale.

That's not even the layman's version. "React against"?? "welding"?? And what 'it' is called the galvanic scale btw?

Just goes to show, eh!

 

[Dogtrousers]

Aluminium and Carbon are at opposite ends of the periodic table, or something like that.
[...]
I'm not a physicist

You don't say?

 

[migrantwing]

That's not even the layman's version. "React against"?? "welding"?? And what 'it' is called the galvanic scale btw?

Qué?

I'm just going off what this guy said. I think it's more than fair to say that he knows his Spring onions from his shallots.

 

[Drago]

[/SIZE]

Well, selected bits of the truth.

 

[T4tomo]

My wife has a Giant Dash flat bar road bike with an alloy frame, carbon forks & carbon seat post.
Some time back she had to replace the seat post as it had started to delaminate. While she was waiting for the new one to arrive, the LBS loaned her an alloy one for a week or so.
She moaned like hell about how noticeable the difference in comfort was! I was glad when the new carbon post arrived.....

Just goes to show, wives will always fine something to moan about!

 

[oldroadman]

Absolutely!

The road surfaces round here are dreadful in many places. If I ride my aluminium Cannondale CAAD5 with high pressures (100+ psi) in 23C tyres, the bike feels horrid, and I have even lost bottles from the cages when riding down bumpy descents. After switching to 25C tyres and lower pressures (80-90 psi), the bike feels fine and the bottles stay where they should be!

Spot on. 25's roll better and comfort is good. Simple and cheap fix, better than messing about with expensive stuff you don't need. As for "shimming for more flex", I'm sure you'll have your own thoughts on that one, for me correct size is correct size, and shimming - why??

 

[oldroadman]

Just goes to show, wives will always fine something to moan about!

Princess and the pea, and all that. Just reduce TP a bit.