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Is My Seatpost Cracked Or Is the Paint Just Scraped?

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Is My Seatpost Cracked Or Is the Paint Just Scraped?

Old 05-28-15, 04:00 PM
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Is My Seatpost Cracked Or Is the Paint Just Scraped?

Damn thing slid down on me after I friggin' adjusted the seat height and didn't tighten the seatpost clamp/binder tight enough mid-ride... ruined the paint on the back and scared the life outta me, but rode it to a nearby LBS and they looked at it, inspected things and seemed to give me the okay... The wrench that was there lubed the screw in the seat clamp area which really reduced some noise I was experiencing and he torqued the seatpost clamp correctly...

I went out and finished up the back half of a 50 mile ride with no problems... but I still wanted some of ya'll's input...

thanks in advance.



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Old 05-28-15, 04:52 PM
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Looks like a abrasion to me. You should be able to rub it out.
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Old 05-28-15, 06:13 PM
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Originally Posted by George
You should be able to rub it out.
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Old 05-28-15, 07:49 PM
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Originally Posted by George
Looks like a abrasion to me. You should be able to rub it out.
Are you being serious or a dick? lol... sorry.. there's no way to pick up sarcasm on here...
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Old 05-28-15, 07:53 PM
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Relax, he's being serious. Tap a coin on and around the area if you're still concerned.

But do rub it out though. At any and every opportunity.

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Old 05-28-15, 07:55 PM
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This is like NFL instant replay. The call on the field cannot be overturned without clear incontrovertible evidence.

Likewise, you have the opinion of someone who had the post in his hands, and there's no way I or anyone else can say he's wrong based on a small photo. So the call stands, the post is fine, and next time be sure to clamp properly before riding.
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Old 05-28-15, 07:56 PM
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Why would you think it is cracked if it just slid down?

You might try reaming the top edge of the seat tube to reduce future scares.
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Old 05-28-15, 08:04 PM
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Originally Posted by woodcraft
Why would you think it is cracked if it just slid down?

You might try reaming the top edge of the seat tube to reduce future scares.
I agree the post looks fine, but reaming the seat tube isn't really the cure.

I would apply some carbon paste, and be sure to properly torque the post clamp.
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Old 05-28-15, 08:21 PM
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Originally Posted by FBinNY
This is like NFL instant replay. The call on the field cannot be overturned without clear incontrovertible evidence.

Likewise, you have the opinion of someone who had the post in his hands, and there's no way I or anyone else can say he's wrong based on a small photo. So the call stands, the post is fine, and next time be sure to clamp properly before riding.
As an NFL fan, this is perhaps the GOAT post.
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Old 05-28-15, 08:31 PM
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Originally Posted by bigdo13
Are you being serious or a dick? lol... sorry.. there's no way to pick up sarcasm on here...
Yes I was being serious. I don't know what made it so funny to RNAV, but that's what I would do to it.
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Old 05-28-15, 08:37 PM
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Originally Posted by rbk_3
As an NFL fan, this is perhaps the GOAT post.
I see you're a Rams fan, and I like the pun, but what is a "goat post"?
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Old 05-28-15, 08:38 PM
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Originally Posted by FBinNY
I see you're a Rams fan, and I like the pun, but what is a "goat post"?
Greatest of all time
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Old 05-28-15, 08:44 PM
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Originally Posted by rbk_3
Greatest of all time
thanks.
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Old 05-28-15, 08:47 PM
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Originally Posted by George
Yes I was being serious. I don't know what made it so funny to RNAV, but that's what I would do to it.
OKAY, sry, just wasn't really sure...

how precisely does one rub that scrape out?
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Old 05-28-15, 08:48 PM
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Originally Posted by k_kibbler
Relax, he's being serious. Tap a coin on and around the area if you're still concerned.

But do rub it out though. At any and every opportunity.

what am I listening for when I tap the coin ?
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Old 05-28-15, 09:09 PM
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Originally Posted by bigdo13
OKAY, sry, just wasn't really sure...

how precisely does one rub that scrape out?
I'm sure you could get a rubbing compound from an auto parts store that would help make the scratch less obvious.
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Old 05-28-15, 09:11 PM
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Originally Posted by bigdo13
what am I listening for when I tap the coin ?
Click, click, click, thunk. Basically, you're looking for a soft spot when you tap it. If its significantly damaged, there will likely be a spot that sounds very different when you tap it.
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Old 05-28-15, 09:14 PM
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Originally Posted by gsa103
Click, click, click, thunk. Basically, you're looking for a soft spot when you tap it. If its significantly damaged, there will likely be a spot that sounds very different when you tap it.
Your technique is correct, but from the OP's description of what happened, it's unlikely the post is structurally damaged.
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Old 05-29-15, 12:24 AM
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Originally Posted by BoSoxYacht
I agree the post looks fine, but reaming the seat tube isn't really the cure.

I would apply some carbon paste, and be sure to properly torque the post clamp.
My suggestion was only related to the post getting scraped, not as a cure for slipping.

+1 on the paste.
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Old 05-29-15, 10:16 AM
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Originally Posted by gsa103
Click, click, click, thunk. Basically, you're looking for a soft spot when you tap it. If its significantly damaged, there will likely be a spot that sounds very different when you tap it.
so just a difference in the sound as opposed to other areas .... okay... I think I gotcha... kinda sounds like the high science of wheel spokes and all that when they build em...

thank you for the tip...
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Old 05-29-15, 11:48 AM
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If you really need the peace of mind - shine a bright flashlight inside the post and see if there's an indentation where the outside abrasion is. Having seen a few cracked posts in person, they have always exhibited evidence of a crack from both sides. This is what the LBS does on a cursory inspection and if they gave you the OK without a thought then it's probably fine.
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