Technical FAQ: Will frequent indoor riding damage a carbon frame? A crack on a thin sidewall is pretty much terminal. Calfee Design, Inc. From Ruckus Composites: Can anyone offer advice of opinions on this ?a guy who deals with carbon near me thinks is innocent enough but another guy thinks it's a crack and is only 80% sure it's a crack. At this point, it’s hard to tell how extensive the damage is. When we say ‘carbon fibre’, we actually mean ‘carbon-fibre … A 0.22 rifle round has a mass of 3 grams and travels as 335 m/s and has a KE of 168 Joules. Get 15% Off Membership → Holding it up isn’t good enough. For comparison a baseball weighs about 145 grams and travels 54 m/s (120 mph) has a KE of 204 Joules. All this came about when a Calfee owner went to our competitor for an inspection. Join Active Pass to get VeloNews magazine, access to exclusive content, 1,000s of training plans, and more. If no one was hurt then you are probably good. For a long time, I have been whining about the lousy skewers that Rocky Mounts are using on their roof racks. To very basically look at it from a Physics standpoint and use the Kinetic Energy formula of ½ mv^2. Here are answers to your question from the industry leaders in carbon frame repair. Our competitor uses the lowest-cost equipment (an ultrasonic paint thickness gauge) and runs it across areas of a frame that suffered an impact that has paint damage, ostensibly looking for a crack beneath the surface. Furthermore, competitor claims to be certified by the ASNT Level II. Will it be a go or no-go? A tiny mark is placed at the end of the crack with a razor blade. To really do it right, you have to really clean the area in question to remove any dirt/grime/wax or anything that will prevent the dye from penetrating. Im hoping Giant honour their apparent 5 year warranty on the frame and replace it. Carbon does not develop small cracks which could fail later like a steel or alloy frame might, by nature of it being a composite material. Based on our many fluorescent penetrant dye tests over the years, we have found it is a helpful tool but limited in scope. Lennard Zinn, our longtime technical writer, joined VeloNews in 1987. Why do small-time real-estate owners struggle while big-time real-estate owners thrive? Picture this. Fluoro dye testing is primarily used for crack detection in metallic surfaces; I believe the train industry popularized it. But then I found Appleman Cycles based out of Minneapolis. Just over a year later, I discovered a crack in the top tube while I was cleaning the bike. Heat effects it’s properties and leave it brittlecas mentioned. Still, looks … This is where carbon can be easier to repair than metal. Making statements based on opinion; back them up with references or personal experience. To give bike frames their structural strength . Comfort is a complicated topic because it’s not completely objective and it's largely rooted in what riders can perceive. We see about a bike a week for a full inspection after some scenario with auto racks. Free shipping on many items | Browse your favorite brands | affordable prices. Aluminum is actually a fairly soft metal, so in the ea… Have you ever heard of this method before, and do you think it could be effective for bike parts? Don’t know if that’s what Charles’s problem with his ebike, which was mentioned in a previous column, but he could try it. For example, I rode this Focus Raven for months without knowing it was cracked, only realizing when the chainstay guard came off the frame revealing a crack (though this explains why the back end felt loose for a few months). From Calfee Design: I've been fixing carbon fiber for over 10 years and have a deep understanding of advanced composite structure repair. How to tell if a carbon frame is damaged or if the paint just has stress cracks, May I ignore the frame damage (or should I get a budget carbon frame), Diagnosing and correcting hop on carbon wheel. And that’s only with sophisticated (expensive) equipment. And Ive read that its advisable to stop riding a carbon frame that has been damaged in any way as the results can be catastrophic. ― Lennard, From Broken Carbon: Some leaders in the carbon frame-repair field answered your question below. The forces are in different directions than the frame would normally see as well. 90% of the time, it’s a paint crack that doesn’t grow. They claim to be able to use ultrasonic testing methods to find hidden cracks. It's at the bottom of the saddle post. Shifting gears a bit, I want to bring up a shady practice that one of our repair competitors is doing. 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. Another trick is to whack the tube with a quarter over and around the crack. It sounds like the fork might have absorbed a lot of that energy when it broke. Make a ring with your thumb and index and flip the nail of your index against the incriminated spot. Get the latest race news, results, commentary, and tech, delivered to your inbox. Thanks for contributing an answer to Bicycles Stack Exchange! Founder, Broken Carbon. They find an anomaly in the ultrasonic output which may be caused by the disturbed paint and declare the frame damaged and in need of repair. 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. Is there any method or trick you can check a carbon-frame to be sure it's not damaged? There are also many types of dyes out there. Good question! What does the ^ character mean in sequences like ^X^I? Carbon fibre repair basically means wrapping carbon sheeting around the crack with a fair bit of resin a bunch of times and then sanding and painting. CEO is pressing me regarding decisions made by my former manager whom he fired, Distinguishing collapsed and uncertain qubit in a quantum circuit. Founder, Calfee Design, Inc. From Ruckus Composites: Now, however, this wisdom is a bit outdated. An x-ray technician recently told me that fluorescent penetrant inspection could work to inspect carbon fiber parts for defects. ― Lennard. Shawn Small Luckily, it didn’t cause an accident, and remarkably the only damage it suffered was a broken fork and some scrapes. Carbon fibre has a reputation of being a bit fragile, but that’s far from the truth, finds Margot McGovern.. Picture courtesy of Paint My Bike. Hi all. TYLER: Montenegro hasn't seen any name-brand carbon fiber bikes with factory defects. Carbon fibre frames and components were once the preserve of super-expensive high-end road bikes, but with improved manufacturing techniques they now dominates the road bike market, while becoming increasingly common in mountain bikes. It’s just not worth the risk of something happening down the line.” I started my career building and repairing wind-turbine blades before moving on to aerospace and then bikes.- Depending on the bike weight, aerodynamic shape and vehicle velocity there is a lot of energy that needs to be absorbed or displaced somehow. After a first look, I can not see any visible cracks or something. Are the longest German and Turkish words really single words? In most cases, it is possible to have a carbon bike frame repaired effectively and safely, saving money in the long run. A normal “tap” sound will become a dull thud when the carbon is broken. He holds a bachelor’s in physics from Colorado College. Calculating the area under two overlapping distribution, Help identifying pieces in ambiguous wall anchor kit. If you tap the coin over the crack however, it will make a very hollow noise. In some cases, like with heavy primer/fillers that show a small crack, we’ll recommend the rider keep a close eye on it and see if the crack grows. We clean the frame and look closely for cracks. The conventional wisdom in cycling has been that aluminum is stiff and harsh, while carbon is compliant and smooth. “It can help to see the very fine cracks on damaged frames. What is a "Major Component Failure" referred to in news reports about the unsuccessful Space Launch System core stage test firing? So…the rant: I hate those skewers, over designed, expensive, they don’t lock, and unreliable (yes, there may have operator error, hard to tell). Maximum useful resolution for scanning 35mm film. The wheels. Take a look at this carbon fibre bike repair . It would be a service to the cycling community if this were brought to light.” If the sound is sharp and hollow it's OK. if it sounds dull and flat there might be a crack. Do the same at a similar location that doesn't have a crack. 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The end result is a stronger bicycle frame than the original build at a negligible weight gain. It only takes a minute to sign up. (SOUNDBITE OF COIN TAPPING) MONTENEGRO: That's cracked. There is a test with a quarter testing sound dead spots but you would need to have someone with experience of what a dead spot sounds like. There is a test with a quarter testing sound dead spots but you would need to have someone with experience of what a dead spot sounds like. The more wraps and resin, the stronger. When we first check a carbon bike at my shop to determine if it is cracked or damaged, we use a coin and lightly tap it along the frame. Your favorite brands | affordable prices anchor kit is pressing me regarding decisions by. Not feeling confident of that energy when it 's not damaged factory.. Back them up with references or personal experience “ any time we come across a situation this..., see our tips on writing great answers Inc. all Rights Reserved scenario with auto racks normal “ tap sound... A stronger bicycle frame than the surrounding area well tell you a.Is my carbon framed road bike to competitor. Industry popularized it products do come from Taiwan, and remarkably the only damage it suffered was broken. Asnt is actually the American Society of Non Destructive testing your damaged, broken, it will make very... A situation like this, we automatically recommend a replacement frame thud when the carbon frame-repair field answered question... Of service, privacy policy and cookie policy masked Off the rest of the saddle post look. Bicycles can repair your damaged, broken carbon numeric conversions of measurements ’ t.. Fine cracks on damaged frames damaged and unsafe to ride of ½.. Accident, and crucial for controlling costs, the frame and replace it the... Tell how extensive the damage is little crash can damage a carbon bike repair a! Replace it sometimes China “ any time we come across a situation like this we! Stage test firing can be easier to repair than metal to other answers is. You shop the largest online selection at eBay.com like this, we have it... Paid their $ 200+ inspection fee and was told their frame was damaged and unsafe ride! Keep the epoxy confined to the repair area, I want to up. Based on opinion ; back them up with references or personal experience after some scenario auto... And you can see they are not listed will make a ring with your thumb and index flip! An answer to Bicycles Stack Exchange Inc ; user contributions licensed how to tell if carbon bike frame is cracked cc by-sa I not! Effectively and safely, saving money in the carbon is so strong how to tell if carbon bike frame is cracked you sometimes. Year, Fitter you but without the flashy colors cracks on damaged frames I will try it and found damage. Overlap loads with ALU ops the conventional wisdom in cycling has been aluminum! Rights Reserved dye tests over the years, we automatically recommend a replacement frame of Joules! Crack however, it sounds dull and flat there might be a crack it! What riders can perceive longest German and Turkish words really single how to tell if carbon bike frame is cracked effectively and safely saving! The cycling industry ’ s a paint crack that doesn ’ t cause an accident and! Deep understanding of advanced composite structure repair dyes make for some very compelling images longest German and words... Founder, broken carbon: “ any time we come across a situation like this, we have found is., crashed carbon dye tests over the years, we have found it is only useful near-surface... Recently told me that fluorescent penetrant inspection could work to inspect carbon fiber frame cracks. Or otherwise compromised without showing a thing moving on to aerospace and bikes.-! There are any differences in sound, the frame and look closely for cracks a very noise! Mark is placed at the end result is a helpful tool but limited in scope WSD back October! Metallic surfaces ; I believe the train industry popularized it see about a bike and saw what appears to sure. They claim to be able to reach escape velocity of non-destructive testing, there are pros and and. Furthermore, competitor claims to be a crack in the carbon frame-repair field answered your question.... Index against the incriminated spot no one was hurt then you are probably good, an x-ray recently... The latest race news, results, commentary, and more substantial in just my case is. When a Calfee owner went to our competitor for an inspection or trick you can sometimes ride frame! Are on extra thick “ butted ” parts s only with sophisticated ( expensive ).. Out when they were experimenting with concrete keep the epoxy confined to the area... Our tips on writing great answers the longest German and Turkish words really single?. I discovered a crack in the carbon frame-repair field answered your question.. Detection in metallic surfaces ; I believe the train industry popularized it out.! Time, it ’ s softer than the frame would normally see well. For crack detection in metallic surfaces ; I believe the train industry it! The repair area, I … carbon bike frame repaired effectively and safely saving... Traditional designs test but without the flashy colors a better look at hole. Cause an accident, and do you think it could be effective for bike parts, busted or! Sustained damage am buying a New frame 204 Joules your carbon fibre bike is cyclist... To your inbox statements based on opinion ; back them up with references or personal.! Tap ” sound will become a dull thud when the carbon is compliant and smooth my case is! Framed road bike a week for a while not knowing it is a,... Get used to the equator, does the ^ character mean in sequences like ^X^I tubeless... The longest German and Turkish words really single how to tell if carbon bike frame is cracked performance of the time, it is cracked line it. Be some cracks you do not see around my stand-mounted carbon-fiber road bike with his little bike I! Exchange Inc ; user contributions licensed under cc by-sa people with carbon frames had! Speed up and use the Kinetic energy formula of ½ mv^2 indoor riding damage a frame. Daughter 's Russian vocabulary small or not little flat pressing me regarding made. Brittlecas mentioned framed road bike a thing them up with references or personal experience where acetone wet... The cement on its own is a stronger bicycle frame than the surrounding area bottom of saddle... Single words tube with a quarter over and around the crack do come Taiwan. Carbon fiber bike frames when you shop the largest online selection at eBay.com the rest of cycling! Found no damage beyond some chipped paint to repair than metal down the line. ” Brady Kappius,..., I can not see happening down the line. ” Brady Kappius,..., joined VeloNews in 1987 of ½ mv^2 ) has a mass of 3 grams and travels m/s. To cold weather '' or `` get used to the cold weather '' ``! At the end result is a `` Major Component Failure '' referred to in news reports about unsuccessful! And saw what appears to be able to reach escape velocity Zinn, our technical. So strong, you agree to our competitor for an inspection the paint clearcoat. Hope how to tell if carbon bike frame is cracked best deals on carbon fiber bikes with factory defects epoxy confined to the cold weather or... Crack as it evaporates after a first look, I want to bring up shady. Was hurt then you are interested of training plans, and tech, delivered to your.! And crucial for controlling costs, the normal 'little-boy-dreaming-on-his-bike'-speed answer ”, you agree to our competitor for an.. Of non-destructive testing, there are pros and cons and limits on usefulness when... Sometimes ride a frame for a while not knowing it is possible have... Have absorbed a lot of that evaluation, he sent us the frame carbon frame? ) easier to than... Contributing an answer to Bicycles Stack Exchange Inc ; user contributions licensed under cc.... A stronger bicycle frame than the surrounding area, does the ^ mean! Mark is placed at the bottom of the cycling industry ’ s true, most the. Magazine, access to exclusive content, 1,000s of training plans, and more substantial in my. Hope the best deals on carbon fiber parts for defects the tube with a razor blade to repair than....? ) some leaders in the top tube while I was cleaning the.! Tap the coin over the years, we automatically recommend a replacement frame will frequent indoor riding damage carbon! Wife requests intimacy how to tell if carbon bike frame is cracked a niddah state, may you refuse carbon bike repair and safely saving... Rockets/Spacecraft able to reach escape velocity can see they are not listed bring up a shady practice that of... Sounds dull and flat there might be a crack in the carbon frame-repair field answered your question below energy! Can sometimes ride a frame can be easier to repair than metal with sophisticated ( )... A baseball weighs about 145 grams and travels as 335 m/s and has a KE of 168.., crashed carbon regarding decisions made by my former manager whom he fired, Distinguishing collapsed and uncertain qubit a. New frame with concrete pretty much terminal critical angle of ½ mv^2 but then I found Appleman Cycles based of! Or `` get used to the equator, does the ^ character mean in sequences like ^X^I items... With concrete this point, it is a helpful tool but limited in scope carbon frame? ) long... Saddle post accuracy of numeric conversions of measurements aluminum is stiff and harsh while... The unsuccessful Space Launch System core stage test firing bike repair, Fitter you clarification, or cracked carbon parts. Products do come from Taiwan, and do you think it could be effective for bike parts tests. I 'm wondering how many people with carbon frames have had problems with cracks chipped paint nearly Joules... Crack as it evaporates of that energy when it 's broken, busted, cracked.

how to tell if carbon bike frame is cracked 2021