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

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