Seatpost problems continue
#1
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Seatpost problems continue
Okay, at this point this is getting rediculous.
My Astrale frame had a 25.8 seatpost in it. It was a chrome, straight post that takes a seperately clamp to hold saddle rails.
I bought a 25.8 post and it was a bear to get in. So I got a 25.6 and realized it was too ssmall. I realized the clamping area of the frame was pretty distorted and spread it back to where I figured it should be.
I put the 25.8 back in, and now it wouldn't tighten up. There was also a gap between the post and the frame tubing at the bottom of the slot.
Okay, so I got a 26.0. Well, it felt tight going in, but it also had a gap, and can be turned (though it takes quite a bit of effort).
So, I'm not sure where to go next. I can keep throwing posts at it but this thing was ridden with a 25.8 post for a lengthy amount of time (looked like possibly the original post).
My Astrale frame had a 25.8 seatpost in it. It was a chrome, straight post that takes a seperately clamp to hold saddle rails.
I bought a 25.8 post and it was a bear to get in. So I got a 25.6 and realized it was too ssmall. I realized the clamping area of the frame was pretty distorted and spread it back to where I figured it should be.
I put the 25.8 back in, and now it wouldn't tighten up. There was also a gap between the post and the frame tubing at the bottom of the slot.
Okay, so I got a 26.0. Well, it felt tight going in, but it also had a gap, and can be turned (though it takes quite a bit of effort).
So, I'm not sure where to go next. I can keep throwing posts at it but this thing was ridden with a 25.8 post for a lengthy amount of time (looked like possibly the original post).
#2
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It sounds like the ID of the seat tube has been distorted. The two common causes are fitting a too small post and heat from the brazing. Any burrs add to the challenge of finding the correct post, but help hold a post like studded tires help on ice.
So now I would let someone with real experience have a look at this frame. Sure you can try different posts but until you fix the root cause you're just treating symptoms and not the real issues. There's a good chance the binder ears will get damaged from trying to keep a wrong post tight. Andy.
So now I would let someone with real experience have a look at this frame. Sure you can try different posts but until you fix the root cause you're just treating symptoms and not the real issues. There's a good chance the binder ears will get damaged from trying to keep a wrong post tight. Andy.
#3
curmudgineer
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I tend to concur with Andrew.
However, shims are an option. You can buy specific shims from one size to another, that are easy to use because they have a lip to prevent it slipping down too far, or, more cheaply, experiment with e.g. beer cans, hobby shop shim stock, or hardware store sheet aluminum.
However, shims are an option. You can buy specific shims from one size to another, that are easy to use because they have a lip to prevent it slipping down too far, or, more cheaply, experiment with e.g. beer cans, hobby shop shim stock, or hardware store sheet aluminum.
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