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Cracked paint or seatpost shaft?

Old 02-21-19, 05:34 PM
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DynoD500_SR20-d
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Cracked paint or seatpost shaft?


I was cleaning the bike and noticed this under the seatpost clamp. Depends on who you talk to it is either paint or the frame. What does it look like to you?
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Old 02-21-19, 05:38 PM
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Not sure what Iím looking at - is that gnarly crusty thing in the hole..... the seat post 😟?
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Old 02-21-19, 05:44 PM
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Originally Posted by Litespud View Post
Not sure what Iím looking at - is that gnarly crusty thing in the hole..... the seat post 😟?
That's carbon paste. I am talking about the white part. The frame
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Old 02-21-19, 05:45 PM
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Here is the inside.
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Old 02-21-19, 05:47 PM
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There are definitely cracks radiating from the sides of the bottom hole at 3 and 9 o'clock. I don't think you're looking at a catastrophic failure situation though.
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Old 02-21-19, 05:54 PM
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Originally Posted by Hoopdriver View Post
There are definitely cracks radiating from the sides of the bottom hole at 3 and 9 o'clock. I don't think you're looking at a catastrophic failure situation though.
I think the same. I may just do a touch weld grind and paint if it gets worst. Is this normal?
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Old 02-21-19, 07:50 PM
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in theory the drilled hole stops the vertical, slot from cracking those horizontal crack lines, have to remove the paint to see if its the metal..
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Old 02-21-19, 08:07 PM
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I'd leave it alone and wait to see if it gets worse.
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Old 02-21-19, 08:19 PM
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Been riding with the seat post too high??
Open bin... throw IN. BYE>>>

Last edited by GamblerGORD53; 02-22-19 at 12:56 AM.
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Old 02-22-19, 03:33 AM
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Originally Posted by GamblerGORD53 View Post
Been riding with the seat post too high??
Open bin... throw IN. BYE>>>
nope.
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Old 02-22-19, 03:34 AM
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Originally Posted by fietsbob View Post
in theory the drilled hole stops the vertical, slot from cracking those horizontal crack lines, have to remove the paint to see if its the metal..
so I should drill a tiny hole at the end of the horizontal hole to keep it from spreading? The vertical were indeed paint.
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Old 02-22-19, 06:21 AM
  #12  
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What is the frame material. Post #4 almost looks like carbon although it could be hone marks.
Nevertheless, in #4 , there looks to be some cracks making it through to the inside.
If it is a steel frame, then a welder trained in frame repair could grind out the crack, weld, grind and repaint it. But, would it be worth it on a steel bike.

Any chance that it is under warranty? Are you the original owner? What does your LBS think?
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Old 02-22-19, 07:01 AM
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Originally Posted by bakerjw View Post
What is the frame material. Post #4 almost looks like carbon although it could be hone marks.
Nevertheless, in #4 , there looks to be some cracks making it through to the inside.
If it is a steel frame, then a welder trained in frame repair could grind out the crack, weld, grind and repaint it. But, would it be worth it on a steel bike.

Any chance that it is under warranty? Are you the original owner? What does your LBS think?
It is 7005 Aluninum. It was purchased in the UK and sent to me here. I emailed them as it is still under the 2 year warranty. I am going to stop by a cycle repair place here in Brooklyn to see what they think in case Ribble decides they cannot replace the frame or if it is bad. I was going to tap two holes at the end to prevent the sharp edge from running forward in the meantime
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Old 02-22-19, 07:38 AM
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I wouldn't drill relief holes just yet, but instead just watch for a while. The big question is how the cracks happened. Assuming that the post is the correct diameter, perhaps something happened during initial assembly. If the seat post is too small, flexing could have done it as would over-clamping. It's certainly worth it to get out the calipers and measure. How do the cracks line up with the post clamp?
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Old 02-22-19, 07:49 AM
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Originally Posted by Hoopdriver View Post
I wouldn't drill relief holes just yet, but instead just watch for a while. The big question is how the cracks happened. Assuming that the post is the correct diameter, perhaps something happened during initial assembly. If the seat post is too small, flexing could have done it as would over-clamping. It's certainly worth it to get out the calipers and measure. How do the cracks line up with the post clamp?
This is the correct seatpost. 31.8 and the think is super long. It goes down the post way deep.
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Old 02-22-19, 08:22 AM
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Originally Posted by DynoD500_SR20-d View Post
so I should drill a tiny hole at the end of the horizontal hole to keep it from spreading? The vertical were indeed paint.
if you want it to last the longest possible time, don't stop drill. You won't hit the end of the crack and even if you do it just makes the crack longer. Your bike, but people who recommend stop drilling have heard about it but have no technical knowledge of when it is appropriate or not
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Old 02-22-19, 08:47 AM
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Originally Posted by unterhausen View Post
if you want it to last the longest possible time, don't stop drill. You won't hit the end of the crack and even if you do it just makes the crack longer. Your bike, but people who recommend stop drilling have heard about it but have no technical knowledge of when it is appropriate or not
im gonna put a mark on it and watch if it spreads. In the meantime I contacted the manufacturer and waiting for them to get back to me.
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Old 02-22-19, 01:09 PM
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Those cracks remind me of the Kestrel 400. We sold a few of them back then and they all developed cracks like that freaking out the owners. The cracks were in the paint and it took the Kestrel rep to come in and convince them that the bike was fine.
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Old 02-27-19, 08:50 AM
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Originally Posted by TiHabanero View Post
Those cracks remind me of the Kestrel 400. We sold a few of them back then and they all developed cracks like that freaking out the owners. The cracks were in the paint and it took the Kestrel rep to come in and convince them that the bike was fine.
the companies response to detailed pics

Thanks for getting in touch.

It doesn't look like there's any structural issue with the frame, it could be that a small amount of movement in the aluminium when tightening and loosening the seat collar has caused the paint to separate slightly the best thing I could recommend is you mark the ends of the cracks with tape or a sharpie and see if the crack grows over time.


If you would like us to further inspect the frame we would need to have it back. If we find a material or manufacturing defect we would look to replace it with the new Endurance AL which you can have a look at at the link below:
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Old 02-27-19, 10:42 PM
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They're offering to take it back. The stuff does crack, and i think they're cracks. And i'd send it.
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Old 03-09-19, 02:23 PM
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Ribble Bikes for the win. This alone makes me a lifetime customer. They are even putting a new bottom bracket on for a clean swap. Only thing I have to do is get internal cable now cause this frame is internal vs external.

I 1000% recommend Ribble to anyone looking for a bike online.
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Old 03-09-19, 02:32 PM
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Originally Posted by DynoD500_SR20-d View Post

I was cleaning the bike and noticed this under the seatpost clamp. Depends on who you talk to it is either paint or the frame. What does it look like to you?
That is definitely cracking of the seat post probably from overtightening the seat post clamp. This is a dangerous condition and this is one of the few areas on a carbon bike that I would trust a repair. It you let this go it can crack around the circumference and the seat post could out on a hard bump in the least safe place.
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Old 03-09-19, 02:40 PM
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Originally Posted by RiceAWay View Post
That is definitely cracking of the seat post probably from overtightening the seat post clamp. This is a dangerous condition and this is one of the few areas on a carbon bike that I would trust a repair. It you let this go it can crack around the circumference and the seat post could out on a hard bump in the least safe place.
Except that the fame is aluminum, and has already been replaced by the company that made it.
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Old 03-11-19, 07:56 AM
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That's a good call on the part of Ribble. Good for you.
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Old 03-25-19, 03:05 PM
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Originally Posted by phughes View Post
Except that the fame is aluminum, and has already been replaced by the company that made it.
I made the mistake in thinking the frame was carbon since I saw so many carbon frames broken that way. You made the mistake of misspelling "frame" and Ribble agreed with my assessment that was a dangerous crack.

By the way - There seems to have been a remarkable reduction in breaking carbon frames. I don't know if people are finally getting the idea that you don't complain about a carbon fiber frame breaking when you run into the side of a car at 15 mph or if they are getting the hang of the material and we're getting very few frames and forks breaking without reasons? I have seen this occur but have finally gone back to CF and my Colnago CLX 3.0 is easily the best bike I've ever ridden. But perhaps it just fits me better than most other bikes?
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