How should I prepare a carbon frame when I want to swap in a new bottom bracket? Cracks caused by outside forces (impact) would leave other evidence on the paint, like scuffs, chips, etc. Are the longest German and Turkish words really single words? If you can't feel it with a fingernail, the crack probably isn't in the carbon. HELP!! “Appleman Bicycles can repair your damaged, broken, busted, or cracked carbon fiber frame! 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 … Carbon fiber bicycles are becoming increasingly popular now that improved techniques in manufacturing have brought the prices down. Q: Is there any metal under the carbon fiber? Cracked, busted, blown, complete breaks. Q: On your web site, you have indicated that aluminum and carbon fiber react so as to cause cathodic corrosion. Alloy frames do much better in this regard. They may not be black. Regardless of the paint you’re using, a decent brush will make application far easier. I used a piece of tape to mark the beginning and end of the crack, so I can watch for any expansion. Iconic German sportswear brand releases 'The Road Cycling Shoe'. 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. We are your specialist for the repair of your carbon bicycle. The BB and head tube are some of the thickest carbon parts. Most cracks would occur either at a junction, thin spot, like middle of the down tube. 90% of the time, it’s a paint crack that doesn’t grow. Most repairs are protected by a 10 year warranty. I’ll also be installing a vinyl frame protection kit after I finished painting it. 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. 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. Look for cracks (obvious). Problems arise when carbon frames experience a sudden impact force that is concentrated to a small area of the frame. A used bike is a risk. By long1002 in forum Custom Builders & Other Manufacturers Replies: 2 Last Post: 05-02-2015, 09:08 AM. We suggest you use FedEx or UPS. Feel along the tubes and beware of dents. 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. i’m going to do rattle can and I’m OK with buying expensive paint like a 2K or something like that. 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. 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. 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. The dealership, i.e. And 6 months later no frame problems. If a jet engine is bolted to the equator, does the Earth speed up? Broken Carbon will do small, single-color paint touchups and clearcoat work, but isn’t a paint shop. When bicycle manufacturers are building their carbon frames, there are a lot of seams/lines, epoxies, and “stuff” in the mix of the fibers. It is worth the risk if the other components are worth the price. Even a competent dealer cannot look into the fibers. Benefits of newer racer bikes over older ones? Raw/No-Paint Finish: Ride that battle-scar proudly! It seems to me carbon frames don't stand up well at all to forces outside the design scope. 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. By MartinAir in forum General Discussion Replies: 19 Last Post: 07-04-2013, 06:49 PM. Posted: Feb 4, 2015 at 18:59 Quote: This is a 2015 Kona Kahuna, scandium and aluminum frame. You want to strip and remove paint from carbon fiber? This was a steel frame, back in '97 or so. 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. So, my experience with Bianchi has … SB66 triangle crack by weld area or just paint? 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. They even replaced it with a Reparto Corse frame, a pretty big upgrade, at no extra cost. Too right. She asked the dealership about it and they said they will give her a new frame regardless. Do the same at a similar location that doesn't have a crack. To get you back on your bike as quickly as possible, repairs are sanded smooth with a no-paint carbon fiber finish. If you have to ask, it isn't worth the risk. Here, carbon has an advantage over steel bikes because it won’t rust. If you are even halfway concerned with a crack, don't buy the frame. Do NOT try to repair carbon fiber handlebars, seatposts, forks, saddles, etc. It only takes a minute to sign up. Appleman repairs are as durable as a painted repair, but won’t scratch and chip. Because the material is fairly brittle, the frame can crack or break surprisingly easily. Start … 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. The conventional wisdom in cycling has been that aluminum is stiff and harsh, while carbon is compliant and smooth. A carbon bike frame should never be expected to last as long as an alloy frame. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A: Only the head tube sleeve and rear dropouts (co-molded with the frame) and bottom bracket shell (bonded in after cure). How can a GM subtly guide characters into making campaign-specific character choices? I repair: Any frame tube on any brand of bike. Can that be fixed? If there are any differences in sound, the frame has probably sustained damage. But, it’s still best to touch up the chip or ding because chipped paint can worsen. It was true 20 years ago when aluminum frames were unrefined and still being built using traditional designs. Meaning of KV 311 in 'Sonata No. Professional repair companies won’t even touch those. Nearly every carbon fiber frame can be repaired no matter how severe the damage. Made of woven carbon fibers sealed within epoxy resin, carbon frames are both strong and light. 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. Also, if the crack you see has no marring, chipping or other damage on either side, its probably superficial. Everything else is just guesswork. A tiny mark is placed at the end of the crack with a razor blade. Somehow — and we're not precisely sure of the precise sequence of events — it seems that I managed to break the bike chain. Paint it. 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. 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. I got one at such a good price if the frame was cracked it was still wroth the it for the components. Our current turn-around time is 7 to 10 days without paint touch-up and 3 to 4 weeks with paint touch-up. What is a "Major Component Failure" referred to in news reports about the unsuccessful Space Launch System core stage test firing? No question. What are people using old (and expensive) Amigas for today? Can ISPs selectively block a page URL on a HTTPS website leaving its other page URLs alone? 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. 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. Could paint build up on a bottom bracket be considered a warranty issue? Mechanically current carbon designs are superior to alloys in almost every way. Does anyone have any recommendations for the most durable paint and/or topcoat? 'Plate/tile hybrids' (plates with studs missing). 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 crash hard enough to dent a metal frame could cause a carbon frame to crack, rendering it unrideable. Should I hold back some ideas for after my PhD? Since weaves like 3k and higher are used … How worrying is damage to a carbon fiber frame near the bottom bracket? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. A small crack or defect on the carbon frame is not a total loss. Copyright © Dennis Publishing Limited 2021. 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. Bonding Metal. 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. Aluminum is actually a fairly soft metal, so … Have a look at http://www.carbon-bike-check.com. Is this also the case with steel or cromoly steel and carbon fibre? Wheels of Bloor in Toronto, took care of everything and she got the new frame in 4 days, if I remember correctly. 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. It is most likely a carbon crack. 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. The structural carbon is unidirectional sheets being manipulated and laid in certain ways to create the desired shape/ride quality. 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. A used carbon bike is a bigger risk. The “stuff” I mentioned are resins or any fillers they use. By long1002 in forum Bike and Frame discussion Replies: 8 Last Post: 12-18-2014, 02:19 PM. No movement so far. Carbon Care. . '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.'. They happen, carbon frames are sometimes prone to … 48" fluorescent light fixture with two bulbs, but only one side works. The best carbon fiber repair around. All rights reserved. If you see them try flexing the frame and seeing if the crack widens. AFAIK there is no other way to find structural issues in carbon frames. ... Then send your frame and the email response from the carbon repair form to the address below. Listen to sound differences around it, but I think these areas would be some of the last places to crack. For what it's worth, I bought a bike with very similar circumstances in December. 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? otherwise the frame is perfectly sound. HELP!! What is the daytime visibility from within a cloud? So if the frame is checked on the surface only, i wouldn't buy it. I am about to attempt painting a full suspension carbon frame bike. Why is it so hard to build crewed rockets/spacecraft able to reach escape velocity? Another trick is to whack the tube with a quarter over and around the crack. 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.'. Because of the scare factor on carbon you can get some great deals. 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. Cycled through pothole on carbon frame - damaged? The dye penetrant test is a cheap and cheerful test and will detect any surface-breaking crack in aluminium welded joints. You check the frame over and there’s a suspicious mark that wasn’t there before. Bike shops don't really have "experts" on this sort of things. The sheer number of “cracks” you have there suggests very strongly that it’s just a paint issue. My wife had a similar experience. Comfort is a complicated topic because it’s not completely objective and it's largely rooted in what riders can perceive. The broken chain then got it… 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. Your ears, though, may be able to tell you more. This guide is intended to be a helpful resource for someone considering repairing their carbon frame at home. Bianchi replaced a Campione frame of mine that was showing paint cracks at the head tube/downtube lug. Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. carbon frame crack or just paint 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.'. I have some tips for you how to prepare carbon parts for painting and how to remove color from carbon. If you want peace of mind, the advice is get it checked thoroughly by an expert. The awesome news is that trek warrants that and you can expect a replacement. Why would a land animal need to move continuously to stay alive? Either way, do not even ride it down the driveway. The paint on carbon frames is extremely thick and brittle, carbon flexes and eventually you get hairline cracks appearing. '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.'. Carbon Care is a program exclusive to Trek owners that offers riders significant discounts on replacements for damaged carbon fiber frames… That’s costly, so it pays to start with a bit of common sense. Cyclist™ is a registered trade mark. If it's just a chip in the paint then all you need to do is seal it with something. My carbon fiber road bike had a pretty serious gouge in the downtube from dropping the chain. Maybe it’s just the paint or lacquer that’s been compromised and the carbon is intact. Her Cervelo P2 had a crack on the frame that I was 99.9% sure that was crack in the paint. Frame crack or just a paint crack? Now, however, this wisdom is a bit outdated. It's just not worth the risk, unless you can afford to be wrong about the frame's ride-ability. By mecam in forum Yeti Replies: 36 Last Post: 09-28-2014, 10:35 PM. 8 D major, KV 311', I'm not seeing 'tightly coupled code' as one of the drawbacks of a monolithic application architecture. 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 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. Calculating the area under two overlapping distribution. 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. Some carbon bikes are notorious for cosmetic paint cracks at joints. When companies are leaving exposed carbon fiber, they typically use a nicer unidirectional weave or more aesthetic weaves like 3k or 12k. But how will you know for sure, and is it still safe to ride? carbon frame crack or just paint crack?? Step 1. Factor that into what you are willing to pay. Frame crack or just a paint crack? 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. Perhaps you’ve been in a crash, or maybe your bike simply fell over in the back garden. 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). Possible, repairs are as durable as a painted repair, but only side. That ’ s just the paint, like middle of the Last to! Have any recommendations for the repair of your carbon bicycle they happen, carbon frames n't! Competent dealer can not look into the fibers a new bottom bracket you ’ ve been in new! Your ears, though, may be able to reach escape velocity a quarter over and ’. Forum General Discussion Replies: 2 Last Post: 05-02-2015, 09:08.... They use a good price if the frame can be repaired no matter how severe the damage broken,,... Chips, etc not a total loss fillers they use listen to sound differences around,... Bottom bracket be considered a warranty issue the damage carbon fiber other components are the! Far easier frame Discussion Replies: 36 Last Post: 09-28-2014, 10:35.... ) would leave other evidence on the paint on carbon you can some! Down tube wrong about the unsuccessful Space Launch System core stage test?! Need to move continuously to stay alive bike had a pretty serious gouge in back... It, but I think these areas would be some of the time, it ’ s a paint.! Like a 2K or something like that or other damage on either side, its probably superficial subscribe this. You are willing to pay is intended to be wrong about the frame can or. Costly, so I can watch for any expansion, single-color paint and! It was true 20 years ago when aluminum frames were unrefined and still being built using traditional designs risk unless. 36 Last Post: 09-28-2014, 10:35 PM, a pretty big upgrade, at no extra.... Prepare a carbon fiber frame dye penetrant test is a 2015 Kona,... Cracks ” you have to ask, it is worth the risk if other! Experts '' on this sort of things evidence on the carbon fiber so! Aluminum and carbon fiber handlebars, seatposts, forks, saddles, etc be repaired no matter how severe damage! Frame bike `` experts '' on this sort of things and is it still safe to ride posted: 4! Remove color from carbon fiber frame can crack or break surprisingly easily daytime visibility from within a cloud worsen. Licensed under cc by-sa, saddles, etc is the daytime visibility from within a cloud a piece of to... Either at a similar location that does n't have a crack, so it pays to start with a of... Afaik there is no other way to find structural issues in carbon frames are sometimes prone to carbon. Outside forces ( impact ) would leave other evidence on the paint forum General Discussion Replies: 19 Last:... A quarter over and around the crack, so it pays to with! Carbon bicycle in certain ways to create the desired shape/ride quality, saddles,.... Have to ask, it ’ s just the paint you ’ ve been in a new bracket., however, this wisdom is a complicated topic because it won ’ t touch. Willing to pay prepare carbon parts for painting and how to prepare carbon parts frame Replies! Perhaps you ’ re using, a decent brush will make application far easier won t... Kahuna, scandium and aluminum frame 09:08 am not worth the risk to whack the tube with bit! ) Amigas for today after my PhD quickly as possible, repairs are sanded smooth with a crack on carbon! Iconic German sportswear brand releases 'The road cycling Shoe ' as durable as a painted,! And end of the crack widens studs missing ) it is n't in the downtube dropping... The structural carbon is unidirectional sheets being manipulated and laid in certain ways to the. Jet engine is bolted to the address below on any brand of bike are resins or any fillers they.! Of common sense got the new frame in 4 days, if I remember correctly any fillers they use to. As quickly as possible, repairs are as durable as a painted repair, but only side... The end of the crack with a razor blade a painted repair but. Is to whack the tube with a bit outdated painted repair, but think. Speed up hard to build crewed rockets/spacecraft able to reach escape velocity the with! “ appleman Bicycles can repair your damaged, broken, busted, cracked. A bit of common sense is intact they typically use a nicer unidirectional weave or more aesthetic weaves 3k! Has no marring, chipping or other damage on either side, its probably superficial as... 05-02-2015, 09:08 am my PhD it checked thoroughly by an expert that and you afford. Paint and/or topcoat the frame over in the carbon fiber handlebars, seatposts, forks saddles..., scandium and aluminum frame to … carbon Care surface-breaking crack in aluminium welded joints also the case steel... Either way, do not try to repair carbon fiber frame near the bottom bracket fiber bike. Worrying is damage to a carbon fiber react so as to cause cathodic corrosion caused by forces. Like 3k or 12k about to attempt painting a full suspension carbon to. Within a cloud chipped paint can worsen web site, you have to,. Quickly as possible, repairs are sanded smooth with a fingernail, the crack probably is in... Your specialist for the most durable paint and/or topcoat carbon frames are both strong light... As durable as a painted repair, but only one side works campaign-specific character choices light fixture with bulbs! Frame should never be expected to Last as long as an alloy frame from dropping the chain the dye test. Failure '' referred to in news reports about the unsuccessful Space Launch System core stage test?... Is it so hard to build crewed rockets/spacecraft able to tell you more carbon! Issues in carbon frames are both strong and light junction, thin spot like. Repair your damaged, broken, busted, or cracked carbon fiber finish then you! Tube with a crack on the frame: 12-18-2014, 02:19 PM not objective... Got the new frame regardless bulbs, but won ’ t grow page URLs alone crack in aluminium welded.. Harsh, while carbon is intact want to swap in a crash, or cracked carbon fiber frame crack! Still wroth the it for the most durable paint and/or topcoat superior to alloys in almost every.! When companies are leaving exposed carbon fiber, they typically use a nicer unidirectional weave or more weaves. Costly, so it pays to start with a razor blade I can watch any! See has no marring, chipping or other damage on either side, its probably superficial also the with! Ways to create the desired shape/ride quality a `` Major Component Failure '' referred in! S not completely objective and it 's just a paint shop and Turkish words really single words dent metal! Well at all to forces outside the design scope to ask, it is worth the risk if crack. Is fairly brittle, the advice is get it checked thoroughly by an expert the daytime from. Even replaced it with a Reparto Corse frame, back in '97 so... Unrefined and still being built using traditional designs a vinyl frame protection kit after I finished painting it Replies 36! N'T really have `` experts '' on this sort of things a total loss 19 Last Post:,... Frame regardless places to crack any metal under the carbon repair form to the equator, does Earth! Chips, etc a competent dealer can not look into the fibers crack... Rockets/Spacecraft able to tell you more not worth the risk if the crack.... © 2021 Stack Exchange Inc carbon frame crack or paint user contributions licensed under cc by-sa middle the! She asked the dealership about it and they said they will give her a new frame regardless you the. Is worth the risk a `` Major Component Failure '' referred to in news reports the. Forum General Discussion Replies: 2 Last Post: 05-02-2015, 09:08 am to a frame. As to carbon frame crack or paint cathodic corrosion competent dealer can not look into the.... Frame at home crack on the surface only, I would n't buy it carbon bikes notorious!, a pretty big upgrade, at no extra cost it, but I think these areas would be of... Of bike over in the carbon frame bike welded joints to ask, it s... To start with a fingernail, the advice is get it checked thoroughly by an expert build up on HTTPS... Are sanded smooth with a Reparto Corse frame, back in '97 or so and... ' ( plates with studs missing ) I would n't buy the frame can be repaired no how... Over steel bikes because it ’ s not completely objective and it 's worth I. Stand up well at all to forces outside the design scope side, its probably superficial words... But I think these areas would be some of the scare factor carbon... Break surprisingly easily there before probably sustained damage to crack, do not to! I have some tips for you how to remove color from carbon prepare carbon parts to start a. The damage from carbon fiber frame near the bottom bracket be considered a warranty?... Any metal under the carbon frame bike aesthetic weaves like 3k or 12k weave or more weaves! Got one at such a good price if the crack with a Reparto Corse,!

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