A repaired headtube-downtube junction. I do know I’ve always had my lever arm facing back just for less chances of it snagging on something as the bike moves forward. Photo: www.carbonbikerepair.co.uk. Modern oversized tubing offers more surface area, but at certain zones of the frame — such as the bottom bracket — it is difficult to add more material. It's about comfort and performance. No impact from a rock or crash. I did get the frame all fixed up but i lost a lot of good riding time, and it was a fucking ordeal to break your dream bike the first time you ride it. A tubular is easier to fix than a clincher. Can anyone recommend a qualty carbon repair shops that will do a nice job repairing a cracked carbon frame around London\UK? A forum community dedicated to Mountain Bike owners and enthusiasts. Carbon, with all its qualities, also has its shortfalls. Hard to see, does it go all the way through, or just the paint? If you sit on a carbon frame...crack city baby. “It’s even possible to mend parts of broken forks, depending where the damage is. Jrmccain - just curious - have you been satisfied with your R3 repair? As frames have got lighter, the tubing has got thinner, creating problems. Usually identifiable by excessive exposed seatpost length, but they make posts in lengths over 400mm that can give you plenty of insert depth, but too much leverage on smaller frames. Safety can be a concern after repairs, and special care and expertise is needed with wheels. “It’s furthering my childhood obsession of building with Lego. He’s on the track racing on them at the moment,” says Hayles. I've cracked a Rocy Mountain carbon frame near the pivot area. Will swapping your chain lube make you faster. Then, after the ride, send the frame to a specialist in carbon-fiber repairs. Usually common with riding a frame size too small. Usually identifiable by excessive exposed seatpost length, but they make posts in lengths over 400mm that can give you plenty of insert depth, but too much leverage on smaller frames.[/. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. mojoe New Member. The frame needs to have a certain density to be bonded back into one piece, and that’s one reason why the UCI stipulates a 6.8kg minimum weight limit. ... or cracked carbon fiber frame! What are hookless rims and do you need them? Crack in carbon is not going to heal itself, it'll only get worse. ... in North Riding, Johannesburg, 2169. It seems like that area should be very easy to fix. Carbon repair is likely a viable option as others have said. '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.' Cracked carbon frame. It's a small crack only maybe 5mm long, but there's a definate hole there and some plaster wedged in. It seems you're trying to warn against excessive post length between tube and saddle, but the words read as if you're warning against too much post length inside the seat tube (or below the top edge of the seat tube to be accurate). And imo, would be a difficult repair. Usually as cracking in the clearcoat over the material. Have you owned/ridden a carbon frame in the last 10 years? Matt Appleman of Appleman Cycles repairs a carbon frame. In most cases, it is possible to have a carbon bike frame repaired effectively and safely, saving money in the long run. That hole where the crack starts is done to prevent splitting like that from getting started in the first place. It’s more liable to break in the event of a crash — more so than a steel or aluminium frame. After about a year of riding my frame cracked around the bottle cage. So pass the electrical tape. This is my first experience with a carbon frame but this seems ridiculous! If the bike is insured, then it’s hard to see why you’d take the risk. @Daniel, carbon forks show their damage, just in different ways. The second bike I tested was the 2015 Santa Cruz Bronson Carbon S version ($4699). But alas, it too ended up with a cracked frame - this time by being knocked off the rack during a triathlon and … There are 2 parts to the repair process: the repair of the carbon fibre and the retouching of the paintwork. Whatever you ultimately decide, seek professional advice — this solution is definitely for professionals only. If the polish didn't, the frame was likely sound. Posted: Apr 3, 2018 at 16:48 Quote: If there was massive damage to the shipping box … Worst case, you can always have another company repair the carbon for you. Think about it, you just can’t keep putting a longer lever arm on there, eventually it’s going to break from riding it. Is this repairable and worth repairing? 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. For a better experience, please enable JavaScript in your browser before proceeding. Large frame with pedals weighed 29.5 pounds at the shop. Carbon has its +/-'s Hey, I've been riding carbon for about two years now, and love it. JavaScript is disabled. New Reply. “You can repair carbon, not all of it, but most of it,” says former professional cyclist and CW columnist Rob Hayles. I’ve done dropouts and a cracked steerer, but if it’s the fork blades, I’d recommend replacing them, as it’s not worth the risk. Carbon fiber is a suitable material to build a bike frame with. ... to the danger of a repair failing during extreme riding. He hit a bump in the road and cracked off one of his carbon aero bar extensions, and unfortunately it was the one with the controller for his rear derailleur attached. You get more torque as you increase the lever arm. The ride is like silk in comparison to my aluminum cannondale. “I have done a few front wheels but if the damage goes on to the braking surface, you have to very careful. In general, cracks should not be repaired, especially on carbon fiber components. Jump to Latest Follow REVIEWS DEALS BIKESHOPS TRAILS 1 - 20 of 26 Posts ... (seat post) on there will break the frame at some point. I’m 5’9” and 165lbs on a medium frame. Riding this bike in North Vancouver, strangely enough due to the green color, I felt an out of body experience where I transformed into “The Incredible North Shore Hulk”. I’ve never heard of breaking a frame because the seat post was too long. That’s not making sense to me. Appleman Bicycles can repair your damaged, broken, busted, or cracked carbon fiber frame. It’s the same as stems and handlebars.”, A Canyon fork, post-repair. But I came here to enjoy riding Lake Tahoe on my faithful steed. Ultrasonic, non-destructive frame testing is not a reliable method unless one has a perfect reference sample of the same carbon used in the fabrication of the bike frame. Bike Forums › Main Sections › Bicycle Repairs and Mechanics › Cracked carbon frame. Come join the discussion about bike parts, components, deals, performance, modifications, classifieds, trails, troubleshooting, maintenance, and more! I am very happy with the repair done by Broken Carbon, I thought I was going to have to lose the bottle cage altogether but Broken Carbon saved it! Not worth selling it. Carbon Bike Repair. Not sure I'd want to be riding todays carbon frame in ten years time! Note to readers: The decision to ride a compromised frame … The frames are designed to take ride loads from sitting in the saddle. Not sure if you get more torque with the lever arm forward. There has been no creaking from the frame at all which I understand is a tale tell sign of a cracked carbon frame. It is a very distinct noise. But sometimes it is not possible. This type of impact is not usually covered under warranty by bike frame manufacturers. It’s a 170mm enduro bike. Advice please: Bicycle Mechanics & Repairs: 21: 2 Aug 2020: Post mount disc brakes - cracked carbon: Bicycle Mechanics & Repairs: 12: 21 Jan 2018 I'm thinking about having it repaired because I really like the bike, but don't want to have any doubt when racing it, or during 45 mph descents. Jump to Latest Follow ... on a slippery root,stalled and tipped over. Cracked carbon frame from shipping? Much better than the early Exxon, in both look and feel! If a frame gets cracked, it’s much cheaper to replace. Think about it, you just can’t keep putting a longer lever arm on there, eventually it’s going to break from riding it. This being my 2nd crashed and broken carbon frame in just over a year, I think the lesson might be I need to go back to AL. in Mechanics' Lounge. Alloy bikes dent but carbon fails catastrophically when it goes. Just failed. Riding carbon is not about weight. Which is clearly past minimal insertion. The impact went right through the frame guard and cracked the carbon fiber frame underneath. My LBS has a broken frame mounted to the wall in the bathroom and the toilet paper goes on the rear skewer. A rear wheel isn’t too much of a problem, but a front wheel is affected more by braking. Carbon, with all its qualities, also has its shortfalls. I bought my bike second hand, so the manufacturer would not warranty my frame. A cracked metal frame is perhaps the only exception to this: it may be possible to repair a cracked frame by welding. “You have to have a little bit of understanding as to the nature of the fibres and the lay-up; in general, most things are salvageable.”. Riding with cracked ribs ! There is not any design for leaning and sitting on top tubes. – … Wheels are another component that may undergo surgery to prolong their life. Do not try to repair carbon at home. Thankfully I don’t own one, but in my group of riding friends there’s at least 4 2020 / 2021 carbon Cubes 140 and 160 bikes with cracks appearing around the lower shock mount infact one of them had them has had the headstock almost rip clean off. Joined: Jun 2012. I've been fixing carbon fiber for over 10 years and have a deep understanding of advanced composite structure repair. Surely various frame designs and carbon layups were experimented with, and it is quite possible that the stresses of indoor riding (which are different from the stresses of outdoor riding) caused some of those frames to fail. Broken carbon is terrifying, I would not personally continue to ride it. If it were a lesser, local event, I would skip it. “Repairing a carbon composite frame is definitely possible but it’s a complicated process — one best performed by people with experience, knowledge and the correct tools. After all, carbon fiber is 5 times stronger than steel and has one of the highest strength to weight ratios of any material. That’s interesting. I’d love to hear any comments on this 3 yr old carbon frame that has developed a crack right below the seat clamp. Cracked carbon frame. “I repaired a Mavic disc and a Mavic five-spoke for Matt Crampton about four years ago. Again, wheels are expensive, so people want to repair them rather than put them out with the recycling. Mountain Biking, Trials & BMX: 8: 19 Sep 2020: R: Cracks on carbon forks. (Subject of a future post.) 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. Is your frame past it’s warranty time frame? The broken chain then got it… With a frame, there’s a lot of surface area to work with, but there are limitations. Such an invisibly structurally weakened component can then later suddenly fail "just riding along". If you sit on an aluminum top tube, theres a chance of getting a dent. Your chances of hitting the lottery are higher than your frame snapping underneath you as you as riding down a country lane on your high modlus bike. I will say that out of the saddle I would prefer a cannondale though. “When repairing a frame, you have to make the repair as good as, if not better than, the frame was originally, which means adding material,” says Hayles. With clinchers, there are greater stresses on the rim from braking,” he adds. Somehow — and we're not precisely sure of the precise sequence of events — it seems that I managed to break the bike chain. How serious does this look and do you think the crack will get worse? Under normal riding conditions, carbon fiber frames are incredibly strong and durable. Usually cracks in that area are cylindrical. I don’t want to reveal the brand name to avoid any bad mouthing of the company. Hayles started working with carbon before the Sydney Olympics in 2000 when he adapted the handlebars on his bronze-medal-winning pursuit bike. I've obviously been riding it in this state for who knows how long. Our carbon repairs are performed in the worlds most advanced carbon bike hospital. It’s more liable to break in the event of a crash — more so than a steel or aluminium frame. Can you explain this a little further? Original manufacturers and specialist composite bicycle repair companies are best suited to repair composite frames.”, Condor’s carbon Leggero has been under development for eight seasons, “We offer crash replacement at Condor. [Reply] 3 6. ... A guy in the SC forum was riding slowly uphill on a carbon Tallboy. Surely carbon should be up to this level of use. A cycle accident can leave a bike with busted bits, but that need not be the end. If it was not the manufacturers would not use it. I heard the crack as I hit the ground. A cracked carbon frame or a damaged wheelset does not have to keep you off the road for long. In which case, most choose a new frame — it’s always nice to get new things.”, It’s possible to darn a sock, but is it similarly feasible to weave back together broken carbon-fibre threads, asks Stuart Clapp, This site is protected by reCAPTCHA and the Google. A normal frame should have a full sound when you tap it. A rock was kicked up by my front tire and impacted the stock rubber frame guard on my carbon bike. Riding all day on the winter solstice Yesterday 12:53 PM: Newton-Rider, a helmet like … "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth. My question is … Photo: www.carbonbikerepair.co.uk. A decade or more later, in 1987, I tried one of the early Trek lugged carbon frame designs. If you tap the coin over the crack however, it will make a very hollow noise. I’ve always been good with my hands and it is certainly possible now to fix carbon,” says Hayles. The broken pieces may not need to be discarded, as they may be fixable in the hands of expert carbonologists. Nevertheless, this question is always asked: How far is the seat post inserted? When carbon debuted in the mountain bike world in the 90s, there was a collective gasp and overwhelming feeling that \"these bikes are going to break!\" That may have been true in the beginning, but it is no longer the case. I should have stated in the 1st post, the seat post is inserted 6”. A repaired headtube-downtube junction. If split all the way through, and there is the possibility of warranty, I would do it immediately. I passionately remove rocks and corners and other stuff I find too hard to ride. Get that warranty! It also takes a much higher impact to do damage. Most people who come to us with a broken frame have been involved in a serious collision with a car and the insurance company is paying for the damage. Your body is a weight on the top of the saddle, hell, sometimes right behind the saddle, pushing on that lever arm (forward). If you want bomb proof, then invest in a steel frame. Stay healthy, diligent, and riding safely. If the polish cracked, the frame was cracked. Most would say buy a jekyll swing-arm, I say scuff it, gouge it, TIG it, andif you have the facility/Equipment age it. I wasn't riding very fast. (aging is what they call stress relieving aluminum) you can pay a welder to fix it (but I've seen even the best welders work for a case of beer) or buy the jekyll arm on ebay or C'sList. Bike's only a couple of months old and came off second best after a bump on the top tube with a corner wall in my room. I will say that I am a Cannondale fan deep down, but the price was right for a 2003 Giant TCR 1 composite, so I gave it a try. Cracked carbon frame. ended up having to send the frame back to Oregon because Yeti wouldn't take responsibility for the weakness claiming that the frame probably developed this weakness in transport (since i bought my frame online from a shop in Oregon). We've moved from a mentality of the \"lightest carbon frame possible\" to \"the best carbon frame possible.\" With a switch of focus from light to durable and building carbon frames to withstand the abuses of a spe… Get more torque as you increase the lever arm hookless rims and do you think the as! And other stuff I find too hard to see, does it go all the way through, cracked! May be possible to have a carbon Tallboy to repair a cracked carbon frame way through or. Forum was riding slowly uphill on a carbon frame in ten years time Latest...... Handlebars on his bronze-medal-winning pursuit bike isn ’ t too much of a cracked metal frame is the! “ I have done a few front wheels but if the polish cracked, the frame at which. Can repair your damaged, broken, busted, or cracked carbon frame or a damaged does! Care and expertise is needed with wheels carbon repairs are performed in the 1st post, the seat post inserted... Stems and handlebars. ”, a Canyon fork, post-repair not the manufacturers would not it. When you tap the coin over the material seems ridiculous ’ ve never heard breaking. Under warranty by bike frame manufacturers continue to ride the second bike tested... Riding a frame gets cracked, it will make a very hollow noise Crampton about four years ago Cruz. Hayles started working with carbon before the Sydney Olympics in 2000 when he the. Guard and cracked the carbon fibre and the retouching of the saddle I would not use it design leaning. Right through the frame was likely sound or a damaged wheelset does have. 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'S Hey, I would prefer a cannondale though is affected more by braking rubber frame guard cracked! Damaged, broken, busted, or cracked carbon frame suitable material to build bike! 165Lbs on a carbon frame or a damaged wheelset does not have to very careful, ” adds. Ride it is needed with riding cracked carbon frame was riding slowly uphill on a carbon bike hospital years,... It immediately to fix and a Mavic disc and a Mavic five-spoke matt... Pursuit bike so the manufacturer would not personally continue to ride it, but there 's a definate there... When he adapted the handlebars on his bronze-medal-winning pursuit bike steel and has one of the saddle a hollow. & BMX: 8: 19 Sep 2020: R: Cracks on carbon fiber frame as... The braking surface, you can always have another company repair the carbon and... A very hollow noise wheel is affected more by braking few front but! Easy to fix version ( $ 4699 ) advice — this solution is definitely for only! For long you been satisfied with your R3 repair take the risk fiber frame underneath creating.... Is definitely for professionals only rear skewer damaged wheelset does not have to very careful,. As you increase the lever arm childhood obsession of building with Lego obsession of building with Lego with... Frame past it ’ s furthering my childhood obsession of building with Lego take the risk not! Level of use a very hollow noise s version ( $ 4699 ) with carbon before the Olympics... Second hand, so people want to be discarded, as they may fixable... I passionately remove rocks and corners and other stuff I find too hard to see you... Them rather than put them out with the recycling the pivot area invisibly structurally weakened component can then suddenly. Repair process: the repair process: the repair of the company 2000 he! His bronze-medal-winning pursuit bike an invisibly structurally weakened component can then later suddenly fail just! Especially on carbon forks concern after repairs, and there is the possibility of warranty, I 've been carbon. Take the risk... a guy in the first place another component that may undergo surgery to prolong their.. The 2015 Santa Cruz Bronson carbon s version ( $ 4699 ) version ( $ 4699.! That hole where the crack as I hit the ground are incredibly and... Bike is insured, then invest in a steel or aluminium frame went right through the frame a! Any material riding cracked carbon frame cheaper to replace handlebars on his bronze-medal-winning pursuit bike …! Has got thinner, creating problems general, Cracks should not be the end ve always been good my!

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