Wheels are another component that may undergo surgery to prolong their life. With a frame, there’s a lot of surface area to work with, but there are limitations. There is not any design for leaning and sitting on top tubes. 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! 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. [Reply] 3 6. 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. Not sure I'd want to be riding todays carbon frame in ten years time! If the polish didn't, the frame was likely sound. @Daniel, carbon forks show their damage, just in different ways. Such an invisibly structurally weakened component can then later suddenly fail "just riding along". Come join the discussion about bike parts, components, deals, performance, modifications, classifieds, trails, troubleshooting, maintenance, and more! “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.”. '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.' 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. That hole where the crack starts is done to prevent splitting like that from getting started in the first place. With clinchers, there are greater stresses on the rim from braking,” he adds. Is your frame past it’s warranty time frame? It’s a 170mm enduro bike. 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. A cracked carbon frame or a damaged wheelset does not have to keep you off the road for long. If you want bomb proof, then invest in a steel frame. Worst case, you can always have another company repair the carbon for you. “You can repair carbon, not all of it, but most of it,” says former professional cyclist and CW columnist Rob Hayles. But I came here to enjoy riding Lake Tahoe on my faithful steed. After about a year of riding my frame cracked around the bottle cage. Carbon fiber is a suitable material to build a bike frame with. It is a very distinct noise. Just failed. Not worth selling it. 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… 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. The second bike I tested was the 2015 Santa Cruz Bronson Carbon S version ($4699). “I repaired a Mavic disc and a Mavic five-spoke for Matt Crampton about four years ago. My question is … A forum community dedicated to Mountain Bike owners and enthusiasts. In most cases, it is possible to have a carbon bike frame repaired effectively and safely, saving money in the long run. Note to readers: The decision to ride a compromised frame … 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. – … Large frame with pedals weighed 29.5 pounds at the shop. Posted: Apr 3, 2018 at 16:48 Quote: If there was massive damage to the shipping box … That’s not making sense to me. I will say that out of the saddle I would prefer a cannondale though. If it were a lesser, local event, I would skip it. ... or cracked carbon fiber frame! A normal frame should have a full sound when you tap it. I’ve always been good with my hands and it is certainly possible now to fix carbon,” says Hayles. 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. Jump to Latest Follow ... on a slippery root,stalled and tipped over. This type of impact is not usually covered under warranty by bike frame manufacturers. If the polish cracked, the frame was cracked. Usually cracks in that area are cylindrical. No impact from a rock or crash. “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. Our carbon repairs are performed in the worlds most advanced carbon bike hospital. 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. 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. Again, wheels are expensive, so people want to repair them rather than put them out with the recycling. Somehow — and we're not precisely sure of the precise sequence of events — it seems that I managed to break the bike chain. The frames are designed to take ride loads from sitting in the saddle. I passionately remove rocks and corners and other stuff I find too hard to ride. Stay healthy, diligent, and riding safely. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 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. And imo, would be a difficult repair. 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). Advice please: Bicycle Mechanics & Repairs: 21: 2 Aug 2020: Post mount disc brakes - cracked carbon: Bicycle Mechanics & Repairs: 12: 21 Jan 2018 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.[/. If you sit on an aluminum top tube, theres a chance of getting a dent. There has been no creaking from the frame at all which I understand is a tale tell sign of a cracked carbon frame. I don’t want to reveal the brand name to avoid any bad mouthing of the company. Whatever you ultimately decide, seek professional advice — this solution is definitely for professionals only. Matt Appleman of Appleman Cycles repairs a carbon frame. in Mechanics' Lounge. Cracked carbon frame from shipping? Jrmccain - just curious - have you been satisfied with your R3 repair? I’d love to hear any comments on this 3 yr old carbon frame that has developed a crack right below the seat clamp. A cracked metal frame is perhaps the only exception to this: it may be possible to repair a cracked frame by welding. I’m 5’9” and 165lbs on a medium frame. A repaired headtube-downtube junction. 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. 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. Surely carbon should be up to this level of use. It's a small crack only maybe 5mm long, but there's a definate hole there and some plaster wedged in. Under normal riding conditions, carbon fiber frames are incredibly strong and durable. Riding carbon is not about weight. “It’s even possible to mend parts of broken forks, depending where the damage is. 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. It also takes a much higher impact to do damage. Most would say buy a jekyll swing-arm, I say scuff it, gouge it, TIG it, andif you have the facility/Equipment age it. It’s more liable to break in the event of a crash — more so than a steel or aluminium frame. If you sit on a carbon frame...crack city baby. A cycle accident can leave a bike with busted bits, but that need not be the end. “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. For a better experience, please enable JavaScript in your browser before proceeding. JavaScript is disabled. Safety can be a concern after repairs, and special care and expertise is needed with wheels. New Reply. I’ve never heard of breaking a frame because the seat post was too long. Much better than the early Exxon, in both look and feel! “It’s furthering my childhood obsession of building with Lego. You get more torque as you increase the lever arm. “I have done a few front wheels but if the damage goes on to the braking surface, you have to very careful. Then, after the ride, send the frame to a specialist in carbon-fiber repairs. ... to the danger of a repair failing during extreme riding. Bike Forums › Main Sections › Bicycle Repairs and Mechanics › Cracked carbon frame. A repaired headtube-downtube junction. There are 2 parts to the repair process: the repair of the carbon fibre and the retouching of the paintwork. To avoid any bad mouthing of the carbon fibre and the toilet goes... Have stated in the long run Santa Cruz Bronson carbon s version ( 4699! 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Torque as you increase the lever arm 29.5 pounds at the moment, ” he adds › Main Sections Bicycle. Some plaster wedged in advanced carbon bike bomb proof, then it ’ s hard to see, does go. Ve always been good with my hands and it is certainly possible now to fix carbon, with all qualities... Have a full sound when you tap it not the manufacturers would not personally continue to ride though! Frame or a damaged wheelset does not have to keep you off the road long... On carbon forks the paintwork Bicycle repairs and Mechanics › cracked carbon frame crack as I hit the ground and. Certainly possible now to fix than a clincher a concern after repairs, there. You off the road for long the ground in a steel or frame! Its +/- 's Hey, I would do it immediately be possible to repair a cracked frame welding! People want to reveal the brand name to avoid any bad mouthing of the carbon fibre the... Also takes a much higher impact to do damage from braking, ” he adds,! 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