Repairing a Huge Crack in a High End Carbon Frame…
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Discover the secrets of carbon fiber frame repair in this informative and revealing video! If you've ever wondered whether your carbon frame is cracked or how to fix it, this is the ultimate guide for you. Join us as we delve into the world of carbon road bike frames, exploring common issues like broken frames and small cracks. Learn how to identify and assess cracks in carbon frames, understanding what they look like and how they can impact your ride. Follow along as we demonstrate the repair process, showcasing expert techniques to fix a cracked carbon frame and restore it to its former strength and durability.
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Checkout this video next where Rob talks in detail about carbon frames - th-cam.com/video/CXIpU92mTwI/w-d-xo.html
if that vacuum table isnt pulling out my nose hairs out im wearing a mask, those particles from the grinder will fling right in your face
Lol.
Yes, if he's getting paint and carbon flung up onto his shirt, he's getting small particles into his mouth and nose.
But that's just being nit picky. The video was cool....
@@endokrin7897 its worse than riding a bike without a helmet because its guaranteed causing harm especially when doing every day the effects are sure to come.
I have always heard carbon frames are less fragile than people say, but wow, I thought your arm was going to give out before the frame 😂
I thought it was going to break far easier as well. I was surprised when i literally had to hit it full power!
How is this not about heat if the repaired portion is wrapped with toilet paper, etc? Infrared beams can't directly hit the frame.. Am I missing something? Anyway, great video:)
There isn't anything 'special' about the repair process, the reason they aren't showing it is because, frankly, it's probably a little bit agricultural (maybe he wants to hide an air bladder insertion method or something, but it's all normal techniques in the compoaite repair world).
As for retaining the wall thickness the only way to do that is to end up with a (slightly) weaker frame overall - well within safety factors though. And grinding down the actual outer layer of carbon mat isn't exactly great for the strength/stiffness of the finished composite/matrix, you end up with the equivalent of a chopped fibre rather than a biaxial cloth.
You'd have to be pretty damn keen on your frame to justify the cost too.
I could listen to Rob talk all day. It is so interesting to hear an expert share all their knowledge about their craft. The attention to detail, the passion that goes behind the job... thanks
The white wrap on the repair will negate any non-thermal curing effect by the infrared wavelength. It absorbs it and transmits it as heat to the pre-preg carbon fiber. Pre-preg carbon fiber typically cures with heat, and some as low as the 50-60° C range. The name thermoset resin implies heat cure - heat does not antagonize the process.
I love my carbon, but this video is convincing me that maybe my next frame should be titanium.
I am absolutely dumbfounded by the Dogma frame. Some idiot spent a lot of money on that frame, wanted a custom paintjob, but was too cheap to pay someone to do it right. They learned their lesson the hard way.
I honestly just feel bad for the guy
@@daviddarfdas I kind of do and kind of don't. He did it to himself.
@@daviddarfdasI don't lol if you can afford one why cheap out?
“We don’t wear masks because the vacuum table draws all the particles out” said the man with the shirt covered in carbon dust.
I'm glad I'm not this guy's lungs
I was thinking no masks??? As watching that sanding, ,you’re gonna suck up a shit ton of fibres before any ventilation sees it!
Its fascinating to see the process of diagnosis and repair. I used to think carbon fiber frames were extremely fragile to knocks. Clearly theyre more durable than i thought. It would be nice to know the estimated cost for this repair for example. To give people a basic idea. Then we'd know if we have to sell a kidney or something.
I was very surprised at how much force was needed to break through the carbon! As for the price, I'm not really sure, feel free to drop them a message through and I'm sure they can quote - carbonbikerepair.co.uk/wp/
@@irfuelit must’ve hit pretty hard. How bad was the crack?
That is pretty interesting. So he uses an epoxy resin that is triggered with infrared. Has a few types of carbon weaves and thicknesses. And he really only wraps it in plastic wrap, knowing hes going to sand the shit out of it again later, removing half his material. No v bag. It may be precise for wall thickness and some knowhow on the intended construction pattern with uni vs cross weave... but the actual work is same as carbon or fiberglass boat repair... high end boats... not nasty fiber mat, but e glass , s glass, uni, etc... pretty sure i can fix a carbon bike now. Cool
Love these videos with you and Rob so interesting, watch all your content keep it coming appreciate your hard work doing these videos
Thank you... I appreciate your comment. Good to hear you are enjoying all the content!
I would like to know if the frame shown in 1:30 is repairable, and I mean both damages-the cut and the headtube.
Those carbon repair guys should have their own youtube channel. I find this all very fascinating.
They do ‘CarbonBikeRepair’😊
I really want to buy a frame off this gentleman just because of the work ethic in the repair.
Looking forward to the build. I hit something and put a good sized divot into the down tube. It passed a tap test. The repairer said it was removal of epoxy and the carbon was not disturbed.
Good to hear there was only minimal damage!! 👍🏽
Can you make your content inclusive by formatting the auto captioning into closed captioning please? it is extremely hard to watch it relying only on the auto captioning sadly (I'm Profoundly Deaf)
I decided tackle my TCR Seat stay and fixed my crack without leaving a trace of damage... I was back on the bike a week after the accident. Very different material from anything else I worked with before and its super soft when you sand it! it goes fast so you need to be careful and pay attention. I highly recommend anyone to try it themselves, its not as difficult as it may seem. Im sure the Thickness is not ideal compared to original as i sanded down the entire circumference of the tube and used single multi layers by wrapping it around... but Im certain its stronger then original.
Hey, I did the same with my cube MTB bottom bracket, works more than 2 years.
And I was worried about clamping my bike on my rack.
Thank you for sharing another amazing, educatiional video J. Thank you Rob for sharing the knowledge and showing us how strong carbon is.
The hammer assault was reassuring. Carbon is pretty tough.
If one of the main tubes, like the top tube, is broken in two by torsional forces, can that be repaired to the same structure and strength of a new frame??
Really surprised and how little damage that hammer did for so long. I am quite certain that an aluminum tube would have been seriously damaged far sooner.
Another vote for asking some level of pricing on these. I’m sure there is a lot of “it depends”. Maybe a video wandering through the graveyard again with a “this bike had this damage and we’d do X and it would be quoted at Y”. Or “this repair (done by trainee) would have cost X”. It would be good to just have some sense of the range for education.
that’s what we call dead sound 😅
I am missing something? I can't find video two. If there is one that is 🤔
A downdraft table only works if you keep the area you are grinding over the table and close to the extraction. Not waving around off the edge of the table up in the air. Honestly all the dusty shit on his tshirt shows hes not using it properly. I'd probably wear a mask anyway if I was doing it every day. You only get one set of lungs.
To do this work in my country , you need to complete a 3 year diploma unlike Rob . The diploma has a part time work placement component of 18 months .
A qualification in Industrial Design does not recieve recognition of prior learning for the fiberglass and carbon fiber diploma package in Australia .
Same wall thickness, no full wrap, won't show the process. I don't buy this for a second.
A key wisdom is to not to add too much or too little material, just the correct amount in order to neither stress the surrounding original material nor the patch material.
Great information. I'm looking forward to the build and ride.
Me too!!
What would be the cost of this repair ? Looking to get bike repair but can’t find a shop in Arizona .
Buonasera, mi chiamo Giorgio, si ogni in Italia, vorrei seguirvi , ma non conoscendo la vostra lingua, non posso farlo, perché non inserite i testi in italiano, grazie mille
Just got frame from courier. And my frame crack. Can i repair sir?
Thats pretty cool, how much do these type of repairs cost?
hey jourdain great video as always, was wondering how much this whole process costs?
Glad you enjoyed the video. I'm not 100% sure on costs to be honest. I'm sure if you drop them a message the will be happy to help though carbonbikerepair.co.uk/wp/
A common cause of carbon fiber frame failures is when tubing is crushed by a hard object or dropping a road bike down a flight of hard concrete stairs . I have had a few failures come in involving falling down these flights of stairs at railway stations , for example .
It doesn't take that much effort to crack the carbon frame, just a small bump to the rear wheel frame on the downhill and even a top brand frame will crack. Carbon is very fragile and is too expensive to buy and repair. My old aluminum bike has lasted two decades so far, while the high-end carbon bike only lasted three days...
Cracking video Jourdain 😄
Thanks 😁
When Jourdain struck the fluorescent yellow frame , it bounced over the mat a fair bit on the benchtop which absorbed half of the hammer strike kimetic energy . I did this same thing with the top of the seat tube resting against a large block of hardwood held firmly by a workplace assistant . The frame fractured much more readily .
I would love to know what the carbon fiber repair expert thinks of this DIY home repair: th-cam.com/video/MfIIVMNxocw/w-d-xo.htmlsi=OcUdc_307-wdcwUg
I really love your videos with Rob... With all of his knowledge I would love to see him "design" and construct bikes for different riders... (thinking about the average rider, big heavy bloke and a tiny 30 kg Junior...) If you'd make this happen I'd actually take two of the frames ;) (the average rider would be yours?)
its it ok to breath carbon dusts?
If a finish is applied properly why does one have strip the old paint off? When doing a color change on a newer automobile one dosent strip all the paint off. Is this for weight sake on a carbon frame? Definitely not for adhesion.
Does anybody know more about these epoxy paint systems? Do they use epoxy primer and base coats and after acrylic or polyurethane clear coat or the clear coat is also epoxy?
No, you don't need a mask with that excellent exhaust table, but you do need ear protection with those air tools. No excuses.
I was surprised how much abuse that frame took. Gives me some reassurance as Im building my first carbon frame mtb.
You cut out the only interesting part of this video. It is no more than a clickbait like this.
Terrifies me carbon frames
Apparently the guy with the sanded thru frame was getting into the submarine business
Nice to see a skilled craftsman at work.
Myself, being a carbon fiber bike owner , I'm glad I saw this video
Now can you repair a Bianchi with countervail technology?
he took wall thickness from outside the repair area. i wonder how they get compression when theres a hole or soft spot. maybe by doing a thin layer to cover the hole then layer over that. also im not buying that wall thickness is precise without a measuring tool and constant tuning with sand paper by hand, a few back and forths is making a big difference. and the type of carbon is a mystery so the weave, weight, type, total of layers, type of resin, those are all unknowns so even if you get similar thickness its so much different than it was originally. another thing, the damage was to one side of the down tube, and so the repair was done to that side. i would say make the repair symmetrical since the repair changes so much of the bikes characteristics at least it would be a symmetrical change.
Good points! I don't have answers. I guess his secret process would answer those questions. It seems like you don't know what you're getting when you get a carbon bike. What technology did the manufacturer use? Their own factory? A generic factory in Taiwan that makes frames for several OEMs? A cheaper Chinese factory?
Really, this video just makes me want a carbon bike even less.
I've got a 25 year old aluminium bike and absolutely zero frame issues. The issue I have is components aren't compatible much any more, since it's an 8-speed.
I'd love a carbon bike, but would not love a damaged carbon bike with a repair. It would be a nagging point and I'd never fully trust it. I'd always be thinking about it, like a pebble in your shoe.
Ultimately, I want a custom steel or titanium frame. These carbon bikes are strong and it's surprising how resilient they are, but this whole process makes them look like toys. Cheap (expensive) disposable toys.
Shame about that emonda. Interesting facts.
Beautiful and relaxing video. The thing that I love most is that's my bike, bought used less than 1 month ago. Hope will never need a carbon frame repair 🤣
I hope so too!
giant bikes are very strong
God the audio was the worst. Good video otherwise
One of the most hardcore road biking content creator 👍
I'm only 4:29 into the video but pleaseee tell me you're going to show us more of that Kuka robot cell!
👀
what l would find interesting, how they deal with carbon dust and how you have to handle carbon fibra waste and so on
@@irfuelnot true. When ground up it is used as additive for all sorts of epoxies as just 1 example.
wet layup !!!!yay brilliant
esto es un crimen
Could you try to crush a carbon top tube with the clamp of a repair stand?
THat's a good idea! When i have a frame that I can crack I'll do a little experiment
Do a ltwoo erx review
Masterclass content.
Bloody lefties. Who'd you catch that from mate?
My heart is aching.
Fantastic video, I'm looking forward to the rest of the build series.
Thank you, glad you enjoyed it!
Giant's size medium equates to a 54, bruv...
👍🏼 ideally I would have a 54 but you have to take what you can when searching a carbon graveyard 😂
Impressive.
very educational video. thumbs up!
Thank you! Cheers!
Awesome video, looking forward to the build!
You and me both!
they didnt show how he did the repair only the dmg and the result
The process is a company secret. Out of respect to Rob I went outside at this point so I don't even know
@@JourdainColeman ok, but that doesnt bring the world forward. So many carbonframes needs repair. He is hiding it because it is trivial for everyboddy to do it themselves. He is probably just putting something hard behind that he can remove later, like they fix the sailboat hull with fiberglass.
Very interesting video,great information.
Glad you enjoyed it
Truly expert work.
👍🏼
bravooo
Excellent.
Thank you! Cheers!
Ok I have a question for Rob.. how can the new repair be the same wall thickness as the rest of it, when not all of the old material was removed? there was a flap of old material that was poked in. That part there will only be bonded to the layer above it. So technically it will be a layer thinner.
Thank you for your question. The video it edited to show the process to a point. I wish we could show you the whole process and maybe one day we can but for the moment not all our processes are public knowledge. Let’s wait to see what Jourdain says about the ride experience. I have asked him to be as honest as he can about the bike which I’m sure he will.
@Carbon Bike Repair Thanks for the explanation and I appreciate what you did show.
Could be that an inflatable bladder was inserted into the tube to put pressure on any delaminated layers from the inside out
Rocky mtn uses plastic bladders in molds to push back from inside. Allows for v bagging and better resin impregnation.
So would you be pretty confident in the new trek madone frame holding up long term? I'm looking at purchasing one and that's my only concern that gap below the seat post causing the top tube to crack haha
According to my experience of repairing model glider(also carbon composite made), repair of a bike frame is not unacceptable, maybe it will get even stronger. One of my friend cut an aluminium folding bike frame to half, short it and bond it together with carbon, to fit his wife's height, and the frame worked 5 years until now. The only thing you need to worry is that if it was repaired by really craftsman, and someone will fraud it as non-damage.
very interessting! you're doing good promos for carbon. been concerned bout the seat post area though.
if carbon fibre is so strong then why it crack so easily?
I don't think a repaired frame will ever be safe to ride.
Mate, they repair carbon fibre on aeroplanes!
As long as they’re Boeing aeroplanes
"Carbon is not as fragile as people think" he says standing in a workshop full of damaged carbon bikes.
this dude is cool. nice vid.