Carbon Frame Seat Tube Crack dillcai
Your fried had good advice with the nail polish, I've used touch-up paint The paint/polish will crack when there is separation on the 'skin' of the frame.. ' Their 'if it was my bike' stance was to keep riding it My buddy who worked for years at Trek says there is a very good chance it is just the paint that cracked, not the frame.. Otherwise I'll be stuck riding my MTN bike all the time Can't have that -- posted by lpollockSure you can.
I still know the guy I bought if from so if it does turn out to be a cracked frame perhaps he will help me out.
carbon frame seat tube crack
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When this wrap is applied, the major frame sections have already been heated and cured, the frame is heat cured a second time to set the resins in the overwrap & the glue in the joints.. lpollockLifetime: 42,358 mi Member No 3905Member since: Dec 2004Home: Flower Mound, TX Colnago CLX 3.. The tube is steel The cracks combined are about 80% around the tube The seat post is set so that the minimum insertion mark is well below the.. Has anyone else experienced anything similar? Advice? Thanks,chunkLifetime: 17,293 mi Member No.. lpollockLifetime: 42,358 mi Member No 3905Member since: Dec 2004Home: Flower Mound, TX Colnago CLX 3.
seat tube stuck in carbon frame
3905Member since: Dec 2004Home: Flower Mound, TX Colnago CLX 3 0Road bikeposted 1/11/2010 at 7:12:07 PMviewed 6082 timesSo my LBS imparted the great news to me today that my 2003 Trek 5200 carbon frame was cracked, in two places no less (if had about 4K of disposable income lying around, this would be good news).. MTBs rule! First | << Prev 10 | Posts 1-5 (of 5) | Next 10 >> | RecentAny site questions or comments can be sent to admin @ bikejournal.. 33571Member since: Feb 2009Home: IL Trek 520Touring Road bikeSpin Doctor Cyclewerks Cycling Clubposted 1/11/2010 at 7:47:07 PMpost #1 viewed 6036 timesMy memory of which model/year of TREK frames are joined together at which locations is a bit fuzzy, but knowing what I do about how TREK has made their frames over the years, I wouldn't bee too worried.. Bikejournal ForumCategories | Active Threads | My Favorites | My Threads | My Posts | New ThreadsCracked carbon framelpollockLifetime: 42,358 mi Member No.. Visibly there is a hairline crack all the way around each tube Their official stance is 'Your frame is cracked, don't ride it.. What you said jives with what others have told me as well Makes me feel better.. Carbon Monocoque frames don't usually crack from the outside, in They build stress and begin to separate from the inside out hidden from sight.. I'm fairly confident the cracking you see is the overwrap coming unbonded This does NOT imply the glue joint is failing.. One crack is in the seat tube about 4 inches above the BB The other is in the seat stay about 3 inches below the joint with the seat tube.. I would say don't worry until the hairline crack begins to show a gap you can snag a nail or piece of paper on; then it's time to hang the bike up.. I think I will keep riding it for now and just closely monitor what the cracks look like.. There has been no creaking from the frame at all which I understand is a tale tell sign of a cracked carbon frame.. com Copyright © 2001-2020 bikejournal com | All rights reserved. There is a crack in the center of the carbon, about 2cm long where the seat tube made the layup in the back bow out.. The overwrap is impregnated with resin which will set seperatly from the joint glue.. Otherwise I'll be stuck riding my MTN bike all the time Can't have that chunkLifetime: 17,293 mi Member No.. The cracks started at the bottom of the adjustment slot in the back side of the tube.. The two good clues youv'e given are the locations of the cracks and the fact that they travel the circumfrance of the tubes.. When the frame sections are joined, they receive a glue in the joint & an overwrap to reinforce the joint.. A trick he learned from Trek mechanics was to put a bit of finger nail polish over the crack and see what happened to it.. The over wrap can act like a coat of paint, coming loose at the edge and possibly, gradually loosening up deeper over time.. The Head tube, down tube, BB and chainstays see the greatest amount of stress Second would be the seat tube just below the junction of the top tube & seatstays.. I've obviously been riding it in this state for who knows how long Everyone assures me that carbon will not have a catostrophic failure but it's not their rear end on the line.. My seat tube has circumferential cracks 15mm above the top tube joint and 25mm below the top of the seat tube.. 33571Member since: Feb 2009Home: IL Trek 520Touring Road bikeSpin Doctor Cyclewerks Cycling Clubposted 1/12/2010 at 6:46:58 AMpost #5 viewed 5982 timesChunk,.. you're correct about catostrophic failures, the frames don't just POP and you end up with a pile of carbon, they soften up and generally give warning that something is wrong.. HappyLifetime: 101,475 mi Member No 10571Member since: Nov 2005Home: TX Bacchetta CorsaSWB Recumbent bike'BentRider Recumbent Clubposted 1/11/2010 at 9:25:59 PMpost #2 viewed 6018 timesDoes Trek not guarantee their frames? What does Trek say about it?I'd be talking to Trek - if it were my frame.. 0Road bikeposted 1/11/2010 at 10:19:49 PMpost #4 viewed 6002 timesChunk,Thanks for the post.
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