August 31st, 2007
It’s not a joke. I mean we’ve all struggled with stuck seatposts, right? Aluminum and steel are not friends. Or rather they get along FAMOUSLY, but trouble ensues. You know. First it’s “great to see you!” and the next thing you know you’re naked on the interstate and your drink is on fire. I’m just sayin’.
So the first thing to try is ammonia. Take out the BB, turn the bike upside down, and pour that stuff down the seat tube so it fills up. That can dissolve the oxidation on the aluminum. If that doesn’t work? get out the hacksaw blade.
Ideally you can make like 3 cuts (be careful not to cut into the seat tube; the good news is that AL is much softer than steel so you can feel the difference). In this case tho? I had to make a frickin’ forrest of aluminum strips. Yes, this is all the seat post on this Bianchi:
That bit in the middle? apparently came from the upper-left corner. but soon thereafter it was anyone’s guess.
I tried pulling them out with vise grips, chiseling them out with specially made chisels… nothing. nada. So I finally started drilling it out with progressively larger drill bits. For this task it’s good to use really crappy bits (no, I’m serious) as they’re less likely to dig into the seat tube. But, in this case, they did:
oops. Well, that’s it for the tube. This is a welded frame so all you do is cut out the old seat tube around the joints and then carefully grind & file away the bits that are attached to the rest of the frame.
And now, more or less, you just slide the new tube in place after mitering it to the bb:
And then weld it up, slap some paint on, and you’re ready to go. And Mark is forbidden from using anything other than a carbon post ever again, ever. Although Dan and Jesse have managed to get those stuck too…
The moral? We’re begging you. Every month or so loosten your seat post clamp and shimmy that sucker around. You’ll thank us later.
Also the Pogliaghi that was in for a dropout replacement and frame repair is done:
The owner was able to track down original decals which look sharp:
You can see more exciting pictures of these and other frame repairs here.
ALEX UPDATE: she’s home and rocking the physical therapy. Speedy recovery to you!
This entry was posted on Friday, August 31st, 2007 at 6:27 pm and is filed under Everything Else. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.