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Is this a crack on the carbon frame?


Metal seat post with carbon fiber frame?Repair superficial damage to a carbon frameExtending integrated carbon seat tubeCarbon frame damageCarbon frame cracksDoes a carbon frame need two-bolt seat clamp?Should I worry about a chipped carbon mountain bike frame?Lugged carbon frame repaircan I use an aluminium seatpost to install a tagalong on a carbon fiber frame?carbon seat post to carbon seat tube - necessary to loosen periodically to prevent seizing in place?













2















I have just noticed this on the top of my saddle bar and where the seat post clamp is. Is it a crack probably caused by the saddle pressure?
enter image description here










share|improve this question



















  • 1





    Take this same photo monthly, and compare it over time. If the line changes and grows in width or thickness then its a crack. If not, it isn't.

    – Criggie
    3 hours ago















2















I have just noticed this on the top of my saddle bar and where the seat post clamp is. Is it a crack probably caused by the saddle pressure?
enter image description here










share|improve this question



















  • 1





    Take this same photo monthly, and compare it over time. If the line changes and grows in width or thickness then its a crack. If not, it isn't.

    – Criggie
    3 hours ago













2












2








2








I have just noticed this on the top of my saddle bar and where the seat post clamp is. Is it a crack probably caused by the saddle pressure?
enter image description here










share|improve this question
















I have just noticed this on the top of my saddle bar and where the seat post clamp is. Is it a crack probably caused by the saddle pressure?
enter image description here







carbon






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 6 hours ago







Amir

















asked 6 hours ago









AmirAmir

1254




1254







  • 1





    Take this same photo monthly, and compare it over time. If the line changes and grows in width or thickness then its a crack. If not, it isn't.

    – Criggie
    3 hours ago












  • 1





    Take this same photo monthly, and compare it over time. If the line changes and grows in width or thickness then its a crack. If not, it isn't.

    – Criggie
    3 hours ago







1




1





Take this same photo monthly, and compare it over time. If the line changes and grows in width or thickness then its a crack. If not, it isn't.

– Criggie
3 hours ago





Take this same photo monthly, and compare it over time. If the line changes and grows in width or thickness then its a crack. If not, it isn't.

– Criggie
3 hours ago










1 Answer
1






active

oldest

votes


















5














Doesn’t look like a crack, looks more like a surface void that formed during the resin injection molding. These types of imperfections are not uncommon, especially on the inside of the frame where you can’t see them. Less common to see them on the outside as they are usually caught in quality control inspections. While they are not ideal, as areas with voids will be somewhat weaker than areas without voids (depending on the size and depth of the void), they are not critical like a crack.






share|improve this answer




















  • 2





    Most importantly, the irregularity seen in the image has mostly smooth edges (except where worn/machined for the clamp). A crack will generally have sharp edges. However, that very thin line below the more obvious dent could be a crack. But it's more likely just a less severe indication of the mold seam that created the dents at the top. A closer examination would be needed to see if its edge are rounded or sharp.

    – Daniel R Hicks
    5 hours ago











  • Even a void is bad, as it serves as a stress concentrator and results in rapid fatigue cracking, possibly leading to eventual catastrophic failure.

    – Sean
    11 mins ago











Your Answer








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1 Answer
1






active

oldest

votes









active

oldest

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active

oldest

votes









5














Doesn’t look like a crack, looks more like a surface void that formed during the resin injection molding. These types of imperfections are not uncommon, especially on the inside of the frame where you can’t see them. Less common to see them on the outside as they are usually caught in quality control inspections. While they are not ideal, as areas with voids will be somewhat weaker than areas without voids (depending on the size and depth of the void), they are not critical like a crack.






share|improve this answer




















  • 2





    Most importantly, the irregularity seen in the image has mostly smooth edges (except where worn/machined for the clamp). A crack will generally have sharp edges. However, that very thin line below the more obvious dent could be a crack. But it's more likely just a less severe indication of the mold seam that created the dents at the top. A closer examination would be needed to see if its edge are rounded or sharp.

    – Daniel R Hicks
    5 hours ago











  • Even a void is bad, as it serves as a stress concentrator and results in rapid fatigue cracking, possibly leading to eventual catastrophic failure.

    – Sean
    11 mins ago















5














Doesn’t look like a crack, looks more like a surface void that formed during the resin injection molding. These types of imperfections are not uncommon, especially on the inside of the frame where you can’t see them. Less common to see them on the outside as they are usually caught in quality control inspections. While they are not ideal, as areas with voids will be somewhat weaker than areas without voids (depending on the size and depth of the void), they are not critical like a crack.






share|improve this answer




















  • 2





    Most importantly, the irregularity seen in the image has mostly smooth edges (except where worn/machined for the clamp). A crack will generally have sharp edges. However, that very thin line below the more obvious dent could be a crack. But it's more likely just a less severe indication of the mold seam that created the dents at the top. A closer examination would be needed to see if its edge are rounded or sharp.

    – Daniel R Hicks
    5 hours ago











  • Even a void is bad, as it serves as a stress concentrator and results in rapid fatigue cracking, possibly leading to eventual catastrophic failure.

    – Sean
    11 mins ago













5












5








5







Doesn’t look like a crack, looks more like a surface void that formed during the resin injection molding. These types of imperfections are not uncommon, especially on the inside of the frame where you can’t see them. Less common to see them on the outside as they are usually caught in quality control inspections. While they are not ideal, as areas with voids will be somewhat weaker than areas without voids (depending on the size and depth of the void), they are not critical like a crack.






share|improve this answer















Doesn’t look like a crack, looks more like a surface void that formed during the resin injection molding. These types of imperfections are not uncommon, especially on the inside of the frame where you can’t see them. Less common to see them on the outside as they are usually caught in quality control inspections. While they are not ideal, as areas with voids will be somewhat weaker than areas without voids (depending on the size and depth of the void), they are not critical like a crack.







share|improve this answer














share|improve this answer



share|improve this answer








edited 5 hours ago

























answered 5 hours ago









Rider_XRider_X

24.9k14595




24.9k14595







  • 2





    Most importantly, the irregularity seen in the image has mostly smooth edges (except where worn/machined for the clamp). A crack will generally have sharp edges. However, that very thin line below the more obvious dent could be a crack. But it's more likely just a less severe indication of the mold seam that created the dents at the top. A closer examination would be needed to see if its edge are rounded or sharp.

    – Daniel R Hicks
    5 hours ago











  • Even a void is bad, as it serves as a stress concentrator and results in rapid fatigue cracking, possibly leading to eventual catastrophic failure.

    – Sean
    11 mins ago












  • 2





    Most importantly, the irregularity seen in the image has mostly smooth edges (except where worn/machined for the clamp). A crack will generally have sharp edges. However, that very thin line below the more obvious dent could be a crack. But it's more likely just a less severe indication of the mold seam that created the dents at the top. A closer examination would be needed to see if its edge are rounded or sharp.

    – Daniel R Hicks
    5 hours ago











  • Even a void is bad, as it serves as a stress concentrator and results in rapid fatigue cracking, possibly leading to eventual catastrophic failure.

    – Sean
    11 mins ago







2




2





Most importantly, the irregularity seen in the image has mostly smooth edges (except where worn/machined for the clamp). A crack will generally have sharp edges. However, that very thin line below the more obvious dent could be a crack. But it's more likely just a less severe indication of the mold seam that created the dents at the top. A closer examination would be needed to see if its edge are rounded or sharp.

– Daniel R Hicks
5 hours ago





Most importantly, the irregularity seen in the image has mostly smooth edges (except where worn/machined for the clamp). A crack will generally have sharp edges. However, that very thin line below the more obvious dent could be a crack. But it's more likely just a less severe indication of the mold seam that created the dents at the top. A closer examination would be needed to see if its edge are rounded or sharp.

– Daniel R Hicks
5 hours ago













Even a void is bad, as it serves as a stress concentrator and results in rapid fatigue cracking, possibly leading to eventual catastrophic failure.

– Sean
11 mins ago





Even a void is bad, as it serves as a stress concentrator and results in rapid fatigue cracking, possibly leading to eventual catastrophic failure.

– Sean
11 mins ago

















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ValueError: Expected n_neighbors <= n_samples, but n_samples = 1, n_neighbors = 6 (SMOTE) The 2019 Stack Overflow Developer Survey Results Are InCan SMOTE be applied over sequence of words (sentences)?ValueError when doing validation with random forestsSMOTE and multi class oversamplingLogic behind SMOTE-NC?ValueError: Error when checking target: expected dense_1 to have shape (7,) but got array with shape (1,)SmoteBoost: Should SMOTE be ran individually for each iteration/tree in the boosting?solving multi-class imbalance classification using smote and OSSUsing SMOTE for Synthetic Data generation to improve performance on unbalanced dataproblem of entry format for a simple model in KerasSVM SMOTE fit_resample() function runs forever with no result