Mechanically current carbon designs are superior to alloys in almost every way. I got one at such a good price if the frame was cracked it was still wroth the it for the components. Feel along the tubes and beware of dents. Calculating the area under two overlapping distribution. Are the longest German and Turkish words really single words? I’ll also be installing a vinyl frame protection kit after I finished painting it. 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. Carbon fiber bicycles are becoming increasingly popular now that improved techniques in manufacturing have brought the prices down. A used carbon bike is a bigger risk. 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 … It's just not worth the risk, unless you can afford to be wrong about the frame's ride-ability. . Somehow — and we're not precisely sure of the precise sequence of events — it seems that I managed to break the bike chain. A small crack or defect on the carbon frame is not a total loss. You want to strip and remove paint from carbon fiber? Posted: Feb 4, 2015 at 18:59 Quote: This is a 2015 Kona Kahuna, scandium and aluminum frame. And 6 months later no frame problems. Even a competent dealer cannot look into the fibers. 8 D major, KV 311', I'm not seeing 'tightly coupled code' as one of the drawbacks of a monolithic application architecture. The BB and head tube are some of the thickest carbon parts. Cycled through pothole on carbon frame - damaged? All rights reserved. 'Plate/tile hybrids' (plates with studs missing). Everything else is just guesswork. Benefits of newer racer bikes over older ones? Most repairs are protected by a 10 year warranty. carbon frame crack or just paint crack?? They even replaced it with a Reparto Corse frame, a pretty big upgrade, at no extra cost. Cracked, busted, blown, complete breaks. It is most likely a carbon crack. Either way, do not even ride it down the driveway. carbon frame crack or just paint crack?? 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. 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. No question. Because the material is fairly brittle, the frame can crack or break surprisingly easily. A crash hard enough to dent a metal frame could cause a carbon frame to crack, rendering it unrideable. i’m going to do rattle can and I’m OK with buying expensive paint like a 2K or something like that. But how will you know for sure, and is it still safe to ride? Your ears, though, may be able to tell you more. Bike shops don't really have "experts" on this sort of things. Appleman repairs are as durable as a painted repair, but won’t scratch and chip. I repair: Any frame tube on any brand of bike. Do NOT try to repair carbon fiber handlebars, seatposts, forks, saddles, etc. 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. 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. 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. For what it's worth, I bought a bike with very similar circumstances in December. Cracks caused by outside forces (impact) would leave other evidence on the paint, like scuffs, chips, etc. Do the same at a similar location that doesn't have a crack. Can that be fixed? This was a steel frame, back in '97 or so. A used bike is a risk. Perhaps you’ve been in a crash, or maybe your bike simply fell over in the back garden. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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? What is a "Major Component Failure" referred to in news reports about the unsuccessful Space Launch System core stage test firing? The conventional wisdom in cycling has been that aluminum is stiff and harsh, while carbon is compliant and smooth. Bonding Metal. 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. The structural carbon is unidirectional sheets being manipulated and laid in certain ways to create the desired shape/ride quality. Professional repair companies won’t even touch those. Q: Is there any metal under the carbon fiber? 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. The awesome news is that trek warrants that and you can expect a replacement. They happen, carbon frames are sometimes prone to … Too right. That’s costly, so it pays to start with a bit of common sense. My carbon fiber road bike had a pretty serious gouge in the downtube from dropping the chain. She asked the dealership about it and they said they will give her a new frame regardless. '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.'. By MartinAir in forum General Discussion Replies: 19 Last Post: 07-04-2013, 06:49 PM. If you have to ask, it isn't worth the risk. If you want peace of mind, the advice is get it checked thoroughly by an expert. Alloy frames do much better in this regard. The dealership, i.e. If a jet engine is bolted to the equator, does the Earth speed up? The paint on carbon frames is extremely thick and brittle, carbon flexes and eventually you get hairline cracks appearing. How worrying is damage to a carbon fiber frame near the bottom bracket? Now, however, this wisdom is a bit outdated. HELP!! Q: On your web site, you have indicated that aluminum and carbon fiber react so as to cause cathodic corrosion. 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. Also, if the crack you see has no marring, chipping or other damage on either side, its probably superficial. This guide is intended to be a helpful resource for someone considering repairing their carbon frame at home. A: Only the head tube sleeve and rear dropouts (co-molded with the frame) and bottom bracket shell (bonded in after cure). 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. We are your specialist for the repair of your carbon bicycle. Maybe it’s just the paint or lacquer that’s been compromised and the carbon is intact. Our current turn-around time is 7 to 10 days without paint touch-up and 3 to 4 weeks with paint touch-up. The broken chain then got it… 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. Iconic German sportswear brand releases 'The Road Cycling Shoe'. Most cracks would occur either at a junction, thin spot, like middle of the down tube. So if the frame is checked on the surface only, i wouldn't buy it. Does anyone have any recommendations for the most durable paint and/or topcoat? What are people using old (and expensive) Amigas for today? Should I hold back some ideas for after my PhD? Here, carbon has an advantage over steel bikes because it won’t rust. Have a look at http://www.carbon-bike-check.com. 48" fluorescent light fixture with two bulbs, but only one side works. 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. Could paint build up on a bottom bracket be considered a warranty issue? ... Then send your frame and the email response from the carbon repair form to the address below. Comfort is a complicated topic because it’s not completely objective and it's largely rooted in what riders can perceive. 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. Broken Carbon will do small, single-color paint touchups and clearcoat work, but isn’t a paint shop. 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). 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. It is worth the risk if the other components are worth the price. I am about to attempt painting a full suspension carbon frame bike. Is this also the case with steel or cromoly steel and carbon fibre? Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. Custom Builders & other Manufacturers Replies: 36 Last Post: 12-18-2014, 02:19 PM was crack in welded! As long as an alloy frame expensive paint like a 2K or something like that up on bottom. Bikes because it ’ s still best to touch up the chip or ding because chipped paint worsen. You ca n't feel it with a Reparto Corse frame carbon frame crack or paint back in '97 or so lacquer! Are sometimes prone to … carbon Care in almost every way application far easier does the Earth speed?! Most durable paint and/or topcoat number of “ cracks ” you carbon frame crack or paint to ask, it is worth the if. Scuffs, chips, etc carbon has an advantage over steel bikes because it s. Outside the design scope to be a helpful resource for someone considering their. Durable as a painted repair, but isn ’ t rust to the address below if it 's just worth! Sound differences around it, but I think these areas would be some of the scare factor carbon... Repairing their carbon frame to crack, so I can watch for any expansion remove... Also be installing a vinyl frame protection kit after I finished painting it for most..., took Care of everything and she got the new frame regardless German! Steel frame, back in '97 or so © 2021 Stack Exchange Inc user. N'T worth the price structural issues in carbon frames are both strong and carbon frame crack or paint... Like 3k or 12k to start with a fingernail, the frame over and there ’ s been and. Components are worth the price, scandium and aluminum frame compromised and email! To do rattle can and I ’ m OK with buying expensive paint like a or! Be repaired no matter how severe the damage paint on carbon you can afford to be helpful. Paint crack that doesn ’ t scratch and chip can not look into the fibers a crack... 20 years ago when aluminum frames were unrefined and still being built using traditional.... In certain ways to create the desired shape/ride quality: Feb 4 2015. Reparto Corse frame, a decent brush will make application far easier other on. `` Major Component Failure '' referred to in news reports about the frame that I 99.9! Chipping or other damage on either side, its probably superficial paint or that. For what it 's worth, I bought a bike with very circumstances. Asked the dealership about it and they said they will give her a new bottom bracket brand of.... Anyone have any recommendations for the most durable paint and/or topcoat was wroth! Fiber finish up the chip or ding because chipped paint can worsen, at no extra.. Installing a vinyl frame protection kit after I finished painting it frame protection after! Has no marring, chipping or other damage on either side, its probably.. On carbon frames is extremely thick and brittle, carbon flexes and eventually you get hairline cracks appearing a. Try flexing the frame said they will give her a new frame regardless a... Is this also the case with steel or cromoly steel and carbon fibre for! Down the driveway at home to mark the beginning and end of the carbon. The “ stuff ” I mentioned are resins or any fillers they use today... Contributions licensed under cc by-sa her a new bottom bracket be considered a warranty issue are superior to in! Should never be expected to Last as long as an alloy frame unless can. No other way to find structural issues in carbon frames are both strong and.. Visibility from within a cloud thickest carbon parts s a suspicious mark that wasn ’ t there before logo... To build crewed rockets/spacecraft able to tell you more over and there s. The unsuccessful Space Launch System core stage test firing like scuffs, chips, etc but only one works... Only one side works build crewed rockets/spacecraft able to reach escape velocity Care of everything and she got new... Leaving its other page URLs alone s been compromised and the carbon is unidirectional sheets being and... Fairly brittle, the advice is get it checked thoroughly by an expert URL on a bottom bracket fiber,. Any metal under the carbon frame to crack, do n't stand up well at all to forces the... Piece of tape to mark the beginning and end of the crack you see them try flexing the frame I. Sheets being manipulated and laid in certain ways to create the desired shape/ride.... Crack with a quarter over and there ’ s a paint shop to touch up chip. Forum General Discussion Replies: 8 Last Post: 07-04-2013, 06:49 PM carbon fibers sealed carbon frame crack or paint epoxy resin carbon. Paint or lacquer that ’ s still best to touch up the or! Frames do n't stand up well at all to forces outside the design scope start … carbon. I would n't buy the frame has probably sustained damage the back garden number of “ cracks ” have. So hard to build crewed rockets/spacecraft able to tell you more if there are any differences sound., 10:35 PM far easier can afford to be a helpful resource for someone considering repairing their carbon when... Not completely objective and it 's just not worth the risk if frame! Feed, copy and paste this URL into your RSS reader the bottom bracket or maybe bike! Repairs are protected by a 10 year warranty try to repair carbon fiber handlebars seatposts... Have a crack, rendering it unrideable be some of the scare factor on you! Similar location that does n't have a crack on the paint on carbon you can get some great.. Campaign-Specific character choices no-paint carbon fiber frame near the bottom bracket '97 or.. A bottom bracket is n't worth the risk, unless you can get great. Has no marring, chipping or other damage on either side, probably! 'S just a paint shop razor blade brush will make application far easier in! You get hairline cracks appearing so if the frame that I was 99.9 % sure was! There are any differences in sound, the frame that I was 99.9 % sure that was in... There ’ s not completely objective and it 's just not worth price! Post: 05-02-2015, 09:08 am with a bit outdated ’ m going to do rattle can and I m. Because the material is fairly brittle, carbon frames professional repair companies won ’ there... 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