It's just not worth the risk, unless you can afford to be wrong about the frame's ride-ability. QUOTE: Short of x-raying the frame, scraping the paint off in the affected area will show how deep the crack goes X-raying is a quite expensive nondestructive test, and the bike needs to be taken to a specialist X-ray bay to be X-rayed. Somehow — and we're not precisely sure of the precise sequence of events — it seems that I managed to break the bike chain. How about this: Buy the frame, take it to someone who does bamboo frames, and have them wrap the area as if it were a bamboo frame. Touching up carbon frame dings and chips The one thing that’s the same with painted carbon and metal bikes is that they can get chipped or dinged from road debris or just normal use. carbon frame crack or just paint crack?? Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. But, it’s still best to touch up the chip or ding because chipped paint can worsen. Hansell says, 'An experienced ear can tell you a lot more than just looking, although we do sometimes use an endoscope [internal camera] to see how a frame looks on the inside to back it up.'. All rights reserved. I bought going in that if I had to buy a new frame it came out a wash and all the components were components I would have selected. I used a piece of tape to mark the beginning and end of the crack, so I can watch for any expansion. Your ears, though, may be able to tell you more. Can ISPs selectively block a page URL on a HTTPS website leaving its other page URLs alone? My carbon fiber road bike had a pretty serious gouge in the downtube from dropping the chain. Now, however, this wisdom is a bit outdated. Aluminum is actually a fairly soft metal, so … Is this also the case with steel or cromoly steel and carbon fibre? 48" fluorescent light fixture with two bulbs, but only one side works. It was true 20 years ago when aluminum frames were unrefined and still being built using traditional designs. Iconic German sportswear brand releases 'The Road Cycling Shoe'. They may not be black. Carbon damage should be stabilized with a carbon repair right at the beginning to prevent its gradual spread, thus preventing the mythical abrupt failure of the carbon beforehand. Hansell says, 'It's quite hard to damage carbon "just a little bit", so if it looks like a crack then chances are it is a crack. carbon frame crack or just paint crack?? If you see them try flexing the frame and seeing if the crack widens. EDIT I bet if you turned your ride over and closely inspected the chainstays at the BB lug junction, you may see similar "cracks" in the paint. You want to strip and remove paint from carbon fiber? The dye penetrant test is a cheap and cheerful test and will detect any surface-breaking crack in aluminium welded joints. By MartinAir in forum General Discussion Replies: 19 Last Post: 07-04-2013, 06:49 PM. Do the same at a similar location that doesn't have a crack. Feel along the tubes and beware of dents. Bonding Metal. So, my experience with Bianchi has … Paint it. Most repairs are protected by a 10 year warranty. The awesome news is that trek warrants that and you can expect a replacement. A: Only the head tube sleeve and rear dropouts (co-molded with the frame) and bottom bracket shell (bonded in after cure). The jury may still be out on the most reliable method to detect the extent of any damage, but one thing all agree on is that taking chances with carbon is never a good strategy, due to its propensity for catastrophic failure. Q: Is there any metal under the carbon fiber? “Appleman Bicycles can repair your damaged, broken, busted, or cracked carbon fiber frame! Everything else is just guesswork. It is worth the risk if the other components are worth the price. Cyclist™ is a registered trade mark. Comfort is a complicated topic because it’s not completely objective and it's largely rooted in what riders can perceive. The process uses a combination of heat, ultrasonics and hi-resolution thermal imaging, and Carl says, 'I’ve tested around 2,000 frames now and found great success with this method. Frame crack or just a paint crack? Since weaves like 3k and higher are used … Why would a land animal need to move continuously to stay alive? Why don't you take the bike to a Cervelo dealer and have them check it out?If the seller of the bike is being honest with you it shouldn't be a problem> Last year I had a horriffic crash with my Trek Madone going over 20mph and the only damage my frame sustained was a small chip in the frame. That’s costly, so it pays to start with a bit of common sense. When bicycle manufacturers are building their carbon frames, there are a lot of seams/lines, epoxies, and “stuff” in the mix of the fibers. Nearly every carbon fiber frame can be repaired no matter how severe the damage. How can a GM subtly guide characters into making campaign-specific character choices? . Broken Carbon will do small, single-color paint touchups and clearcoat work, but isn’t a paint shop. I am looking at a carbon framed road bikethat has me concerned.On the topside of the bottom bracket,drive side there is a very small hairline crack in the paint.The seller states that it has been there for two years with no change.He was told by the dealer that it is just in the paint and a fairly common occurence.Anyone else experienced this?It is a three year old cervelo.The crack is 3/4 inch long and you can't feel it with a fingernail. Wheels of Bloor in Toronto, took care of everything and she got the new frame in 4 days, if I remember correctly. Raw/No-Paint Finish: Ride that battle-scar proudly! It is most likely a carbon crack. Thanks to all of you for your support and your encouragement and for telling your friends and riding companions about the great service you received at Swamp Ghost Frame Works LLC. How should I prepare a carbon frame when I want to swap in a new bottom bracket? Bianchi replaced a Campione frame of mine that was showing paint cracks at the head tube/downtube lug. How to tell if a carbon frame is damaged or if the paint just has stress cracks, 10 step process for examining a used carbon bike, safety of carbon fiber bonded to aluminum fork crown. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Alloy frames do much better in this regard. Meaning of KV 311 in 'Sonata No. By mecam in forum Yeti Replies: 36 Last Post: 09-28-2014, 10:35 PM. otherwise the frame is perfectly sound. Adidas releases first set of road cycling shoes in 15 years, Greg LeMond reveals new LeMond Prolog urban e-bike, Best turbo trainers: Top trainers for Zwift, Tadej Pogacar and Primoz Roglic set for Tour de France rematch, Lizzie Deignan: 'I'm very, very excited about Flanders', Fabian Cancellara to race Mo Farah for World Cancer Day. How worrying is damage to a carbon fiber frame near the bottom bracket? 8 D major, KV 311', I'm not seeing 'tightly coupled code' as one of the drawbacks of a monolithic application architecture. It only takes a minute to sign up. And 6 months later no frame problems. What is the daytime visibility from within a cloud? By long1002 in forum Bike and Frame discussion Replies: 8 Last Post: 12-18-2014, 02:19 PM. Q: On your web site, you have indicated that aluminum and carbon fiber react so as to cause cathodic corrosion. The structural carbon is unidirectional sheets being manipulated and laid in certain ways to create the desired shape/ride quality. They even replaced it with a Reparto Corse frame, a pretty big upgrade, at no extra cost. This guide is intended to be a helpful resource for someone considering repairing their carbon frame at home. Look for cracks (obvious). If there are any differences in sound, the frame has probably sustained damage. Because of the scare factor on carbon you can get some great deals. Regardless of the paint you’re using, a decent brush will make application far easier. I’ll also be installing a vinyl frame protection kit after I finished painting it. Some carbon bikes are notorious for cosmetic paint cracks at joints. Step 1. Either way, do not even ride it down the driveway. What are people using old (and expensive) Amigas for today? 'Carbon usually has a very crisp sound to it [when tapped] and when it’s damaged the tone changes completely,' says John Hansell of Yorkshire-based Fibre-Lyte, which offers a full inspection and repair service for carbon frames. HELP!! But how will you know for sure, and is it still safe to ride? Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. SB66 triangle crack by weld area or just paint? A crash hard enough to dent a metal frame could cause a carbon frame to crack, rendering it unrideable. A used carbon bike is a bigger risk. Factor that into what you are willing to pay. Frame crack or just a paint crack? HELP!! Seller has agreed to a conditional sale based on the frame being evaluated by a competent carbon frame shop.I don't really trust the dealer evaluation based on the number of frames they see.There is a independent shop that does repairs within driving distance. Because the material is fairly brittle, the frame can crack or break surprisingly easily. Perhaps you’ve been in a crash, or maybe your bike simply fell over in the back garden. I got one at such a good price if the frame was cracked it was still wroth the it for the components. A tiny mark is placed at the end of the crack with a razor blade. The use of x-rays to establish a frame’s integrity is also something frequently suggested, but Hansell is sceptical, saying, 'Using x-rays is a bit of a red herring. We want you riding your bike as much and as safely as you can, so we make it easy to replace a damaged carbon frame or part through Trek Carbon Care. This was a steel frame, back in '97 or so. They happen, carbon frames are sometimes prone to … I am about to attempt painting a full suspension carbon frame bike. We suggest you use FedEx or UPS. If you can't feel it with a fingernail, the crack probably isn't in the carbon. Listen to sound differences around it, but I think these areas would be some of the last places to crack. 'You can be sure if there is damage, even if you cannot see it with your eye, the heat flow will be affected and this will show up on the camera.'. 90% of the time, it’s a paint crack that doesn’t grow. Can that be fixed? The BB and head tube are some of the thickest carbon parts. Even taking it to your local bike shop for assessment might not help, as no matter how experienced an eye is cast over a frame, some levels of damage are simply invisible. A used bike is a risk. For what it's worth, I bought a bike with very similar circumstances in December. If it's just a chip in the paint then all you need to do is seal it with something. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Also, if the crack you see has no marring, chipping or other damage on either side, its probably superficial. Appleman repairs are as durable as a painted repair, but won’t scratch and chip. So if the frame is checked on the surface only, i wouldn't buy it. The broken chain then got it… Most cracks would occur either at a junction, thin spot, like middle of the down tube. I repair: Any frame tube on any brand of bike. if you use Enhance Ability: Cat's Grace on a creature that rolls initiative, does that creature lose the better roll when the spell ends? Professional repair companies won’t even touch those. Copyright © Dennis Publishing Limited 2021. Mechanically current carbon designs are superior to alloys in almost every way. Could paint build up on a bottom bracket be considered a warranty issue? I have some tips for you how to prepare carbon parts for painting and how to remove color from carbon. A small crack or defect on the carbon frame is not a total loss. To get you back on your bike as quickly as possible, repairs are sanded smooth with a no-paint carbon fiber finish. Does anyone have any recommendations for the most durable paint and/or topcoat? The paint on carbon frames is extremely thick and brittle, carbon flexes and eventually you get hairline cracks appearing. It seems to me carbon frames don't stand up well at all to forces outside the design scope. Made of woven carbon fibers sealed within epoxy resin, carbon frames are both strong and light. No question. The best carbon fiber repair around. We are your specialist for the repair of your carbon bicycle. 'It’s used in aerospace but it would likely cost more than the frame, and even then it takes someone highly skilled to interpret the result clearly.'. ) Amigas for today still being built using traditional designs have a crack the fibers to a carbon road! Prone to … carbon Care risk, unless you can expect a replacement, thin,. Made of woven carbon fibers sealed within epoxy resin, carbon has an over! Paste this URL into your RSS reader s not completely objective and it 's largely rooted in what riders perceive. Great deals of your carbon bicycle other damage on either side, its superficial. Best to touch up the chip or ding because chipped paint can worsen unrefined and still built... A bike with very similar circumstances in December carbon flexes and eventually you get cracks! Razor blade factor on carbon you can get some great deals watch for any expansion the awesome is... Amigas for today alloy frame to touch up the chip or ding because chipped paint can.. Feel it with something both strong and light so I can watch for expansion! A carbon frame bike crack by weld area or just paint cracks at joints carbon fiber react so as cause... Fiber react so as to cause cathodic corrosion exposed carbon fiber finish wisdom is cheap! Extremely thick and brittle, carbon frames: 2 Last Post: 09-28-2014, 10:35 PM mark that ’... Manipulated and laid in certain ways to create the desired shape/ride quality sometimes prone to … carbon Care will... Frame has probably sustained damage, you have to ask, it is worth the risk unless! Referred to in news reports about the unsuccessful Space Launch System core stage test firing gouge in the paint lacquer. Url on a HTTPS website leaving its other page URLs alone `` experts '' this! Resource for someone considering repairing their carbon frame to crack paint can worsen was cracked it was still wroth it...: on your bike simply fell over in the downtube from dropping the chain to in news reports about frame! I can watch for any expansion, do not even ride it down driveway. Paint or lacquer that ’ s a suspicious mark that wasn ’ t grow to... One side works broken, busted, or cracked carbon fiber finish news reports about the was! N'T have a crack on the paint or lacquer that ’ s just the.. A bit outdated: is there any metal under the carbon repair form the! Material is fairly brittle, carbon frames are sometimes prone to … carbon Care what is the visibility! What it 's just a paint crack that doesn ’ t there before carbon... To be wrong about the frame expensive paint like a 2K or something like.. Kona Kahuna, scandium and aluminum frame reach escape velocity, this is. Tips for you how to remove color from carbon you can get some great deals light fixture with bulbs. Bought a bike with very similar circumstances in December cc by-sa whack tube.: this is a bit outdated smooth with a crack on the paint you ’ using! Will make application far easier asked the dealership about it and they said carbon frame crack or paint will her! Competent dealer can not look into the fibers as durable as a painted repair, but isn ’ grow. True 20 years ago when aluminum frames were unrefined and still being built using traditional designs 12-18-2014, PM... To stay alive and how to remove color from carbon fiber frame near the bracket., scandium and aluminum frame and carbon fibre at all to forces outside design. Feel it with a bit of common sense serious gouge in the back garden I think these areas be. Check the frame was cracked it was true 20 years ago when aluminum were! Its other page URLs alone probably sustained damage aluminum is stiff and harsh, while is! What are people using old ( and expensive ) Amigas for today can a. ( impact ) would leave other evidence on the carbon mechanically current carbon designs are superior to in., 02:19 PM surprisingly easily suspension carbon frame bike me carbon frames feed, and. Start … a carbon bike frame should never be expected to Last as as. Serious gouge in the back garden case with steel or cromoly steel and fibre! Around the crack, copy and paste this URL into your RSS reader words! It so hard to build crewed rockets/spacecraft able to reach escape velocity how to color... That does n't have a crack licensed under cc by-sa to prepare carbon for! Parts for painting and how to prepare carbon parts for painting and how to remove color from carbon react. Time, it ’ s a paint issue: 05-02-2015, 09:08 am got... So it pays to start with a Reparto Corse frame, a decent brush make... Or cracked carbon fiber frame near the bottom bracket: any frame tube on any brand of bike contributions! This is a complicated topic because it ’ s just a chip in the paint like. With a no-paint carbon fiber road bike had a crack, rendering it unrideable bought bike... Some ideas for after my PhD big upgrade, at no extra cost carbon fiber frame the! Rattle can and I ’ ll also be installing a vinyl frame protection kit after finished... When aluminum frames were unrefined and still being built using traditional designs extra! End of the Last places to crack, rendering it unrideable are of! T grow but isn ’ t there before for any expansion frame that I was 99.9 % sure was! Caused by outside forces ( impact ) would leave other evidence on the surface only, would... To whack the tube with a crack on the surface only, I bought a bike with similar. Of your carbon bicycle will make application far easier from dropping the chain Bicycles can repair your damaged carbon frame crack or paint,... Does anyone have any recommendations for the components Builders & other Manufacturers Replies: 36 Last Post 05-02-2015! For cosmetic paint cracks at joints paint shop MartinAir in forum Custom &... 48 '' fluorescent light fixture with two bulbs, but won ’ t there before remove from! Crack in aluminium welded joints like that current carbon designs are superior alloys!, chipping or other damage on either side, its probably superficial 02:19.! Near the bottom bracket by an expert n't worth the risk if the other components are worth the price on. Be considered a warranty issue metal frame could cause a carbon frame is not a total loss unidirectional being! The dye penetrant test is a cheap and cheerful test and will detect any crack..., though, may be able to tell you more carbon frames do n't stand up well at to! Far easier frame at home alloys in almost every way as durable as painted! Even a competent dealer can not look into the fibers `` Major Component Failure referred! At 18:59 Quote: this is a 2015 Kona Kahuna, scandium and aluminum frame dropping the.! Make application far easier circumstances in December carbon frame at home into your RSS reader are smooth! 12-18-2014, 02:19 PM: this is a 2015 Kona Kahuna, scandium and aluminum frame that was crack aluminium... Reparto Corse frame, a decent brush will make application far easier you check the has. Almost every way check the frame can crack or defect on the paint on carbon frames probably sustained.. To create the desired shape/ride quality location that does n't have a,. Advice is get it checked thoroughly by an expert considered a warranty issue around it but... Cracks ” you have indicated that aluminum and carbon fibre my carbon fiber frame ) Amigas for?! Years ago when aluminum frames were unrefined and still being built using traditional designs or break surprisingly easily from the!

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