Is this a crack in the paint or carbon?
Moderator: robbosmans
Friend of mine has a crack on his frame in front of the seatpost on the top tube. When he pushes down on the saddle it looks like crack gets wider
Anyway to tell if it's only the paint or if the carbon is also cracked?
Sent from my BND-L21 using Tapatalk
Anyway to tell if it's only the paint or if the carbon is also cracked?
Sent from my BND-L21 using Tapatalk
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That looks like a true carbon crack to me. Looks like there was an impact from the side that rubbed some housing off onto the tube right where the crack starts? Try tapping the area with a coin to listen for changes in sound on the crack. If there is no crack on the opposite side, tap the coin there and see if it sounds the same as the cracked side.
- miltmaster3
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Carbon crack
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πατα τραβα ρε
Expect Carbon crack other wise it has over-flexed enough for the paint to crack and that does not bode well for the underlying structure. Personally would not ride until actual damage/integrity was confirmed
BB
Coffee & carbon
Coffee & carbon
Yeah I had a crack in my old Fuji there. Seem a common place to develop a crack if you run too short a seatpost or the area isn't strongly enough reinforced by the manufacturer or you just hit a pot hole or something hard enough. Frame is toasted very probably. A tip: if you can warranty the frame tell them you were using the OEM seat post which was uncut.
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probably carbon crack, but maybe not, because white colour is very vulnerable for paint-cracks.
berfore "toasting" the frame, i would remove the colour and take a look on the uncovered carbon surface.
for example: i asked "BMC" if those cracks on my frame are structural or simple paint cracks, and if i can use the frame furthermore. they confirmed its only stress cracks of the paint and frame can be used with confidence.
berfore "toasting" the frame, i would remove the colour and take a look on the uncovered carbon surface.
for example: i asked "BMC" if those cracks on my frame are structural or simple paint cracks, and if i can use the frame furthermore. they confirmed its only stress cracks of the paint and frame can be used with confidence.
- wheelsONfire
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Almost impossible to say. The seatpost area do flex. If you'd look at a person biking on a trainer, you could probably see that a frame flex quite a bit.
But one thing in all this which is very strange.
Looking at my old R1, the side fairings flexed very much by design. That paint never cracked.
I think it's the same for race cars?
But on bikes,.... i don't know why, but paint seem to crack much more easy.
Anyway, i have same on my gravel bike. Same region!
It's only one way to know for sure, that requires sanding off the paint.
Or a CT scan
https://www.youtube.com/watch?v=ve_Oa7jl_kQ
But one thing in all this which is very strange.
Looking at my old R1, the side fairings flexed very much by design. That paint never cracked.
I think it's the same for race cars?
But on bikes,.... i don't know why, but paint seem to crack much more easy.
Anyway, i have same on my gravel bike. Same region!
It's only one way to know for sure, that requires sanding off the paint.
Or a CT scan
https://www.youtube.com/watch?v=ve_Oa7jl_kQ
Bikes:
Ax Lightness Vial EVO Race (2019.01.03)
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Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)
Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
Try tapping it with a quarter and listen for changes in the sound.
If it is cracked, send it to Calfee. They fixed my Emonda SLR.
https://calfeedesign.com/carbon-repair/
If it is cracked, send it to Calfee. They fixed my Emonda SLR.
https://calfeedesign.com/carbon-repair/
2015 Trek Emonda SLR Project One - Red eTap - Zipp 303 - 6.48kg
2016 Cannondale SuperX Rival CX1 - 9.29kg
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2016 Cannondale SuperX Rival CX1 - 9.29kg
iRide4Sue.org Please Donate to fight Cancer. $27,000 raised in 2017
does calfee do all the scanning with the dyes and sonograms and stuff?oldnslow2 wrote: ↑Wed Mar 06, 2019 2:33 amTry tapping it with a quarter and listen for changes in the sound.
If it is cracked, send it to Calfee. They fixed my Emonda SLR.
https://calfeedesign.com/carbon-repair/
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