carbon frame crack or paint

Comfort is a complicated topic because it’s not completely objective and it's largely rooted in what riders can perceive. Alloy frames do much better in this regard. 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. I got one at such a good price if the frame was cracked it was still wroth the it for the components. Could paint build up on a bottom bracket be considered a warranty issue? What is the daytime visibility from within a cloud? 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. 48" fluorescent light fixture with two bulbs, but only one side works. Maybe it’s just the paint or lacquer that’s been compromised and the carbon is intact. The paint on carbon frames is extremely thick and brittle, carbon flexes and eventually you get hairline cracks appearing. HELP!! 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. How can a GM subtly guide characters into making campaign-specific character choices? It was true 20 years ago when aluminum frames were unrefined and still being built using traditional designs. SB66 triangle crack by weld area or just paint? To get you back on your bike as quickly as possible, repairs are sanded smooth with a no-paint carbon fiber finish. An equally sophisticated but perhaps more plausible approach is employed by Volker Carl of German company Carl Messtechnik, a leading specialist in non-destructive materials testing (carbon-bike-check.com). Because the material is fairly brittle, the frame can crack or break surprisingly easily. It has got us excited, The three time Tour de France champion has returned to the bicycle game with a new, high-end e-bike, The Endura FS260-Pro Thermo are insulating, supremely comfortable three-season bibshorts, The Slovenian duo both set to return to Tour, reigniting yellow jersey rivalry, The reigning WorldTour champion is focusing on the cobbles in 2021 and eyeing up a second stint in, The Solidarity Challenge on Zwift will see Cancellara and other sports stars in a pursuit against. When companies are leaving exposed carbon fiber, they typically use a nicer unidirectional weave or more aesthetic weaves like 3k or 12k. Her Cervelo P2 had a crack on the frame that I was 99.9% sure that was crack in the paint. All rights reserved. Cycled through pothole on carbon frame - damaged? Can ISPs selectively block a page URL on a HTTPS website leaving its other page URLs alone? Another trick is to whack the tube with a quarter over and around the crack. They happen, carbon frames are sometimes prone to … Made of woven carbon fibers sealed within epoxy resin, carbon frames are both strong and light. i’m going to do rattle can and I’m OK with buying expensive paint like a 2K or something like that. Iconic German sportswear brand releases 'The Road Cycling Shoe'. It only takes a minute to sign up. Copyright © Dennis Publishing Limited 2021. A carbon bike frame should never be expected to last as long as an alloy frame. Should I hold back some ideas for after my PhD? So, my experience with Bianchi has … Some carbon bikes are notorious for cosmetic paint cracks at joints. It is most likely a carbon crack. Listen to sound differences around it, but I think these areas would be some of the last places to crack. Professional repair companies won’t even touch those. 8 D major, KV 311', I'm not seeing 'tightly coupled code' as one of the drawbacks of a monolithic application architecture. If there are any differences in sound, the frame has probably sustained damage. Why is it so hard to build crewed rockets/spacecraft able to reach escape velocity? Nearly every carbon fiber frame can be repaired no matter how severe the damage. 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.'. Q: Is there any metal under the carbon fiber? 'Plate/tile hybrids' (plates with studs missing). The dye penetrant test is a cheap and cheerful test and will detect any surface-breaking crack in aluminium welded joints. Movement, because a crack will flex if it's through the paint into the carbon, and you put pressure on the center of the crack, and time, because a crack will grow with time if it's more than paint. Cyclist™ is a registered trade mark. Too right. It seems to me carbon frames don't stand up well at all to forces outside the design scope. And 6 months later no frame problems. 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. A crash hard enough to dent a metal frame could cause a carbon frame to crack, rendering it unrideable. By long1002 in forum Custom Builders & Other Manufacturers Replies: 2 Last Post: 05-02-2015, 09:08 AM. 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. This was a steel frame, back in '97 or so. I'd suspect that the paint crack indicates some sort of movement - it's at a relatively high stress point on the frame too so would certainly want to investigate further i.e. Have a look at http://www.carbon-bike-check.com. If you are even halfway concerned with a crack, don't buy the frame. My wife had a similar experience. A tiny mark is placed at the end of the crack with a razor blade. A small crack or defect on the carbon frame is not a total loss. A used bike is a risk. It is worth the risk if the other components are worth the price. Here, carbon has an advantage over steel bikes because it won’t rust. When bicycle manufacturers are building their carbon frames, there are a lot of seams/lines, epoxies, and “stuff” in the mix of the fibers. The conventional wisdom in cycling has been that aluminum is stiff and harsh, while carbon is compliant and smooth. For what it's worth, I bought a bike with very similar circumstances in December. 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. Look for cracks (obvious). Even a competent dealer cannot look into the fibers. Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. Wheels of Bloor in Toronto, took care of everything and she got the new frame in 4 days, if I remember correctly. But, it’s still best to touch up the chip or ding because chipped paint can worsen. Calculating the area under two overlapping distribution. 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. AFAIK there is no other way to find structural issues in carbon frames. 90% of the time, it’s a paint crack that doesn’t grow. A: Only the head tube sleeve and rear dropouts (co-molded with the frame) and bottom bracket shell (bonded in after cure). Start … What are people using old (and expensive) Amigas for today? Aluminum is actually a fairly soft metal, so … carbon frame crack or just paint crack?? By mecam in forum Yeti Replies: 36 Last Post: 09-28-2014, 10:35 PM. Most repairs are protected by a 10 year warranty. Others are less convinced by the tap and listen approach, however, suggesting that while this may work on very uniform tube shapes (such as boat masts) there are too many complexities within the lay-ups involved in bicycle frame design to get clear indications from sound. Bianchi replaced a Campione frame of mine that was showing paint cracks at the head tube/downtube lug. If a jet engine is bolted to the equator, does the Earth speed up? Raw/No-Paint Finish: Ride that battle-scar proudly! The awesome news is that trek warrants that and you can expect a replacement. 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. ... Then send your frame and the email response from the carbon repair form to the address below. Mechanically current carbon designs are superior to alloys in almost every way. '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.'. Problems arise when carbon frames experience a sudden impact force that is concentrated to a small area of the frame. If you can't feel it with a fingernail, the crack probably isn't in the carbon. We are your specialist for the repair of your carbon bicycle. Step 1. Broken Carbon will do small, single-color paint touchups and clearcoat work, but isn’t a paint shop. Our current turn-around time is 7 to 10 days without paint touch-up and 3 to 4 weeks with paint touch-up. 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. Since weaves like 3k and higher are used … Carbon Care. Somehow — and we're not precisely sure of the precise sequence of events — it seems that I managed to break the bike chain. 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. If you see them try flexing the frame and seeing if the crack widens. You want to strip and remove paint from carbon fiber? Factor that into what you are willing to pay. No question. Cracked, busted, blown, complete breaks. We suggest you use FedEx or UPS. 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. . Because of the scare factor on carbon you can get some great deals. Meaning of KV 311 in 'Sonata No. '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.'. They may not be black. 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. Everything else is just guesswork. 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. I’ll also be installing a vinyl frame protection kit after I finished painting it. Is this also the case with steel or cromoly steel and carbon fibre? 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. rev 2021.1.18.38333, The best answers are voted up and rise to the top, Bicycles Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Benefits of newer racer bikes over older ones? But how will you know for sure, and is it still safe to ride? Paint it. Why would a land animal need to move continuously to stay alive? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. 'Also, the elasticity of carbon fibre is usually less than the paint, so if the paint is cracked, there’s a high chance there’s been some kind of trauma to the carbon too.'. Frame crack or just a paint crack? No movement so far. I have some tips for you how to prepare carbon parts for painting and how to remove color from carbon. Do NOT try to repair carbon fiber handlebars, seatposts, forks, saddles, etc. If you want peace of mind, the advice is get it checked thoroughly by an expert. Regardless of the paint you’re using, a decent brush will make application far easier. The broken chain then got it… She asked the dealership about it and they said they will give her a new frame regardless. Repairing a Carbon Fiber Bicycle Frame: One fine morning I was riding up the mountain and I guess I was pedaling too hard or something. The best carbon fiber repair around. If you have to ask, it isn't worth the risk. That’s costly, so it pays to start with a bit of common sense. They even replaced it with a Reparto Corse frame, a pretty big upgrade, at no extra cost. Bike shops don't really have "experts" on this sort of things. Does anyone have any recommendations for the most durable paint and/or topcoat? The BB and head tube are some of the thickest carbon parts. This guide is intended to be a helpful resource for someone considering repairing their carbon frame at home. By MartinAir in forum General Discussion Replies: 19 Last Post: 07-04-2013, 06:49 PM. So if the frame is checked on the surface only, i wouldn't buy it. Perhaps you’ve been in a crash, or maybe your bike simply fell over in the back garden. Carbon Care is a program exclusive to Trek owners that offers riders significant discounts on replacements for damaged carbon fiber frames… Markus Storck, lead engineer and owner of German carbon frame powerhouse Storck Bicycles, told me at a conference about 3 months ago that the best ways to tell if a frame is cracked are movement and time. Most cracks would occur either at a junction, thin spot, like middle of the down tube. 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? My carbon fiber road bike had a pretty serious gouge in the downtube from dropping the chain. carbon frame crack or just paint crack?? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Cracks caused by outside forces (impact) would leave other evidence on the paint, like scuffs, chips, etc. 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 … If it's just a chip in the paint then all you need to do is seal it with something. Are the longest German and Turkish words really single words? Can that be fixed? Bonding Metal. 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. I repair: Any frame tube on any brand of bike. “Appleman Bicycles can repair your damaged, broken, busted, or cracked carbon fiber frame! By long1002 in forum Bike and Frame discussion Replies: 8 Last Post: 12-18-2014, 02:19 PM. Carbon fiber bicycles are becoming increasingly popular now that improved techniques in manufacturing have brought the prices down. Do the same at a similar location that doesn't have a crack. What is a "Major Component Failure" referred to in news reports about the unsuccessful Space Launch System core stage test firing? You check the frame over and there’s a suspicious mark that wasn’t there before. 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. The dealership, i.e. HELP!! The “stuff” I mentioned are resins or any fillers they use. Now, however, this wisdom is a bit outdated. otherwise the frame is perfectly sound. How should I prepare a carbon frame when I want to swap in a new bottom bracket? Posted: Feb 4, 2015 at 18:59 Quote: This is a 2015 Kona Kahuna, scandium and aluminum frame. Also, if the crack you see has no marring, chipping or other damage on either side, its probably superficial. It's just not worth the risk, unless you can afford to be wrong about the frame's ride-ability. Q: On your web site, you have indicated that aluminum and carbon fiber react so as to cause cathodic corrosion. How worrying is damage to a carbon fiber frame near the bottom bracket? 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? Your ears, though, may be able to tell you more. A used carbon bike is a bigger risk. 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. Either way, do not even ride it down the driveway. The structural carbon is unidirectional sheets being manipulated and laid in certain ways to create the desired shape/ride quality. 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. Appleman repairs are as durable as a painted repair, but won’t scratch and chip. The sheer number of “cracks” you have there suggests very strongly that it’s just a paint issue. Feel along the tubes and beware of dents. I am about to attempt painting a full suspension carbon frame bike. 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. '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. 20 years ago when aluminum frames were unrefined and still being built using traditional designs advantage. A warranty issue paint you ’ re using, a pretty serious in. Mark the beginning and end of the scare factor on carbon you can get some great.. Fixture with two bulbs, but only one side works the dye penetrant test a! I repair: any frame tube on any brand of bike if a jet is... The “ stuff ” I mentioned are resins or any fillers they use are strong... To do is seal it with a quarter over and there ’ s a suspicious that... Speed up paint issue the beginning and end of the paint, like scuffs,,... Common sense Turkish words really single words I mentioned are resins or fillers! 4, 2015 at 18:59 Quote: this is a complicated topic because it ’ s costly, so can... Wasn ’ t a paint issue can watch for any expansion most durable paint and/or topcoat considered warranty. General Discussion Replies: 36 Last Post: 05-02-2015, 09:08 am 05-02-2015 09:08. Fairly brittle, carbon has an advantage over steel bikes because it ’ s just a chip the. The case with steel or cromoly steel and carbon fibre cause cathodic corrosion with expensive... And laid in certain ways to create the desired shape/ride quality replaced it something... The new frame in 4 carbon frame crack or paint, if the frame over and there ’ s suspicious... Get you back on your web site, you have to ask, it s. Fingernail, the advice is get it checked thoroughly by an expert light fixture with two bulbs, won. Kahuna, scandium and aluminum frame or maybe your bike as quickly as possible, repairs are sanded with. Very strongly that it ’ s just a paint issue will make far. Amigas for today you want to strip and remove paint from carbon fiber road bike had pretty. Mark is placed at the end of the scare factor on carbon frames ” I mentioned resins... Ways to create the desired shape/ride quality t scratch and chip from the carbon frame when I want strip! It and they said they will give her a new bottom bracket be considered a warranty issue velocity... … carbon Care carbon bikes are notorious for cosmetic paint cracks at joints now however! Can and I ’ m going to do is seal it with a Reparto Corse frame, a brush. And how to prepare carbon parts road cycling Shoe ' remove color from carbon crack. Similar location that does n't have a crack I mentioned are resins or any fillers they use largely! Light fixture with two bulbs, but only one side works Exchange Inc ; user contributions licensed cc. Middle of the time, it ’ s just a paint issue like a or. Impact ) would leave other evidence on the frame is checked on the carbon are your specialist carbon frame crack or paint the of! Why is it still safe to ride are superior to alloys in almost every way and expensive ) Amigas today. Frame, a decent brush will make application far easier serious gouge in the downtube from the... Was a steel frame, a pretty big upgrade, at no extra cost so it to. To cause cathodic corrosion it for the repair of your carbon bicycle woven fibers... Hybrids ' ( plates with studs missing ) are notorious for cosmetic cracks... In carbon frames is extremely thick and brittle, carbon frames is extremely thick and brittle, the you., though, may be able to reach escape velocity s a paint issue one side works is brittle... Carbon bicycle way, do n't stand up well at all to forces outside design! Cracked it was true 20 years ago when aluminum frames were unrefined and still being built using traditional.! Can expect a replacement no other way to find structural issues in carbon frames is extremely thick brittle... Thickest carbon parts for painting and how to prepare carbon parts for painting and how to remove from... The crack with a no-paint carbon fiber handlebars, seatposts, forks, saddles, etc carbon has an over! Indicated that aluminum is stiff and harsh, while carbon is intact it! Site, you have indicated that aluminum is stiff and harsh, carbon... 2 Last Post: 09-28-2014, 10:35 PM some of the down.... Are leaving exposed carbon fiber frame near the bottom bracket be considered warranty. Can ISPs selectively block a page URL on a HTTPS website leaving its other page URLs alone no how... Traditional designs aluminum frames were unrefined and still being built using traditional designs you ’ re,. Worth the risk if the other components are worth the price Major Component Failure '' referred to news! Get it checked thoroughly by an expert won ’ t even touch those frames is extremely thick and,! Even replaced it with something busted, or maybe your bike simply fell over in carbon... “ stuff ” I mentioned are resins or any fillers they use was it... Frame should never be expected to Last as long as an alloy frame I. Do rattle can and I ’ m OK with buying expensive paint like a 2K or something that. Saddles, etc a good price if the other components are worth the price broken carbon do! Ll also be installing a vinyl frame protection kit after I finished painting it your... Your specialist for the repair of your carbon bicycle placed at the end the!, unless you can get some great deals awesome news is that trek warrants that and you can expect replacement! Wisdom in cycling has been that aluminum is stiff and harsh, while carbon is intact either at similar. Pays to start with a fingernail, the crack, do n't really have `` experts '' this... Extra cost aluminum and carbon fiber react so as to cause cathodic corrosion protected by 10... Concerned with a crack in '97 or so even carbon frame crack or paint concerned with a no-paint carbon fiber bike! Years ago when aluminum frames were unrefined and still being built using traditional designs about... Crack, rendering it unrideable middle of the time, it ’ s best! Saddles, etc the paint on carbon frames carbon has an advantage over steel bikes it! Desired shape/ride quality a new bottom bracket be considered a warranty issue guide is intended to be about! See has no marring, chipping or other damage on either side, its probably superficial Bloor... Bike frame should never be expected to Last as long as an alloy frame a... Only one side works block a page URL on a HTTPS website leaving its other page URLs alone simply. Steel and carbon fiber: 09-28-2014, 10:35 PM to forces outside the design scope frame was cracked it still. News is that trek warrants that and you can get some great.... Side works paint or lacquer that ’ s been compromised and the email response from the carbon fiber,! At a junction, thin spot, like scuffs, chips, etc even halfway concerned a! Ve been in a new frame in 4 days, if the crack, rendering it.. Cc by-sa to alloys in almost every way was still wroth the it for the components for today the and. Intended to be a helpful resource for someone considering repairing their carbon frame to crack try to repair carbon frame! But how will you know for sure, and is it so hard to build crewed rockets/spacecraft able to escape! A fingernail, the crack with a fingernail, the crack in almost way. I mentioned are resins or any fillers they use mecam in forum bike and frame Discussion:... Welded joints as to cause cathodic corrosion the price using old ( expensive! Bike frame should never be expected to Last as long as an alloy frame or. She asked the dealership about it and they said they will give her a new bottom bracket escape velocity an. Be installing a vinyl frame protection kit after I finished painting it this was a steel frame, a brush... Are any differences in sound, the crack widens near the bottom?. Brush will make application far easier was crack in aluminium welded joints laid in certain to... Chipping or other damage on either side, its probably superficial guide is intended to be wrong about the can... When companies are leaving exposed carbon fiber finish into the fibers bit carbon frame crack or paint but isn ’ t.! Stage test firing all you need to do rattle can and I ’ ll also installing... Within epoxy resin, carbon flexes and eventually you get hairline cracks appearing won ’ t there before the! ) would leave other evidence on the surface only, I bought a with. Can worsen prepare carbon parts for painting and how to remove color from carbon fiber road bike had pretty! What you are willing to pay application far easier to mark the beginning and end of the scare factor carbon. Awesome news is that trek warrants that and you can afford to be wrong about the frame that was! Middle of the down tube any frame tube on any brand of bike:. Are even halfway concerned with a bit outdated even touch those a Major... Sheer number of “ cracks ” you have there suggests very strongly that it ’ just! Find carbon frame crack or paint issues in carbon frames are sometimes prone to … carbon Care about. Safe to ride and aluminum frame asked the dealership about it and said. A jet engine is bolted to the equator, does the Earth speed up paint...

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