Questions tagged [carbon]

Frames or components made from carbon fiber, possibly even about carbon accessories.

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Wheel scratched carbon on ride

Wheel scratched carbon seat tube Hi everyone, Recently my wheel scratched my carbon seat tube as it loosened at the end of my ride. Was wondering if it is safe to ride. Imgur has 4 images, 2 are below ...
xigoL's user avatar
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0 votes
0 answers
52 views

Carbon seatpost stuck due to damaged grub screw

I have an Orbea Orca 2024 with Di2 and the grub screw for adjusting seat height has potential thread damage and it won't come out. The bike mechanic explained that the reason the grub screw went so ...
Lalit Chilka's user avatar
3 votes
1 answer
214 views

I suspect that my carbon fork has a crack but I can't really tell

I've relocated to a new town so I'm still looking around for good bike shops. For the time being as I was re-assembling my stem, i noticed a small notch of about 0.5mms on the front of my fork (the ...
Greg's user avatar
  • 133
3 votes
1 answer
164 views

Super-glue for minor scrapes on carbon fiber frame - below the top-coat

I scraped my frame on a curb about 1 mm deep in a couple places near the rear axle. (it's a 2021 TREK Domane SL-7). Another post stated that chopper pilots routinely use super glue and baking soda ...
wjktrs's user avatar
  • 545
0 votes
1 answer
106 views

Paint chip or carbon crack [duplicate]

Looking at this bike to buy but I’m 3 hours away from where it is. Not sure if it’s a paint chip or a carbon crack, I asked how it happened and he said he was carrying it upstairs with his bike pump ...
Billy's user avatar
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6 votes
4 answers
1k views

Cracked Carbon Seat Tube

I was riding when my seat tube cracked as I rode over a hump. Are there any possible fixes for this like epoxy, sanding, or something? I'm losing sleep over this.
holocris's user avatar
3 votes
1 answer
734 views

Wear marks on seat stay from fender/mudguard. Problem?

Mudguards have worn away where they contact the seat stay on carbon frame. A little deep, wondering if cosmetic or more serious. The one on the right stay doesn't look as deep but you can see 3 ...
olivercroke's user avatar
1 vote
1 answer
98 views

Carbon frame damaged? [duplicate]

I had a crash a couple of weeks ago with my BH Quartz. The front wheel got caught in a crack in the road, I heard a crack and I fell on the side. I was worried that the frame cracked, but couldn't ...
hagi10's user avatar
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-4 votes
1 answer
99 views

Is it possible to prove that applied forces to a top tube are worse than a seatpost when using a repair stand clamp?

This stems from the idea that you should use a bike stand clamp on a seatpost, if you can, for carbon fiber (CF) bike frames. Hopefully, this would avoid the cracking of a CF bike frame. In order to ...
cocobutters's user avatar
5 votes
1 answer
649 views

Shallow ring of death

By not servicing the headset for a long time (>10K km), I ended up with the so-called ring of death on the steerer tube. If you have never heard of it, watch this ...
Alessandro Cosentino's user avatar
3 votes
1 answer
492 views

Should I use fiber grip or grease when installing a bottom bracket into a carbon frame?

I am assembling my first carbon road bike and came across a question regarding on how to install the bottom bracket. I decided to go for this Ninja BBRight for my Cervelo Caledonia. The Token's ...
Bob's user avatar
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2 votes
1 answer
244 views

Noticed a small scratch in the integrated crown race of my carbon fork. How fragile is this part of the fork?

I recently had to take apart the headset of my Cannondale Caad 13 road bike due to some clicking noises I wanted to diagnose. Therefore I also pulled out the fork a bit to inspect bearings and ...
conste's user avatar
  • 483
3 votes
2 answers
168 views

Carbon Damage on bridge, repair possible? If so, what steps are needed?

This is a follow up question to: Attachmentpoint rim brakes carbon bike, sratches/crack? So. My bridge on my x lite 4 seems to be delaminating. Unfortunately Rose does not want to honor their six year ...
roverhendrix's user avatar
-1 votes
1 answer
45 views

How much does GT zaskar carbon comp cost? [closed]

So i checked the bicycle GT zaskar carbon comb and its prize was 22k rupees and in other websites it cost more. What is the real price and is there any GT zaskar carbon comp for 22k rupees 22k rupees =...
Anonymous's user avatar
4 votes
4 answers
1k views

Are cleat backing plates for protecting carbon sole?

I've just bought my first MTB shoe that has carbon sole. When I wanted to put on the SM-SH51 cleats, I saw that it has some claws, that would (in my opinion) damage the carbon sole of the shoe. So I ...
Mat's user avatar
  • 809
3 votes
1 answer
229 views

Is the carbon frame disposal problematic

I heard from someone that carbon is difficult to dispose of. Does anyone know how to dispose of carbon frames?
Maik Lowrey's user avatar
6 votes
2 answers
665 views

Attachmentpoint rim brakes carbon bike, sratches/crack?

I own a 2019 Rose XLITE carbon road bike with rim brakes. Today, I conducted a thorough inspection, taking things apart. At the rear of the bike, on the attachment point where the brake is fixed to ...
roverhendrix's user avatar
0 votes
0 answers
56 views

Damaged carbon fibre [duplicate]

My chain dropped and got stuck in my bottom bracket while I was going uphill. I think the force from the pedal stroke damaged the carbon fibre. Wondering what is recommended when something like this ...
Jocelyn's user avatar
8 votes
2 answers
4k views

Do carbon MTB frames crack easily?

I have been looking to buy a new full sus mtb (Vitus sommet 29 Cr) and saw that the main frame is carbon fibre with the rear triangle being aluminium. I love the bikes specs and aesthetics but can't ...
whyte22's user avatar
  • 89
0 votes
3 answers
2k views

Building a carbon gravel bicycle - Shimano 105 7020 vs GRX RX600/800

I've got into cycling around 2 years ago, mainly going to the office and cycling around the city/when traveling. Thing of 2 months ago started with long-distance and speed experimentation, and ...
leonacostaok's user avatar
3 votes
2 answers
826 views

Carbon chainstay damage assessment

Is it likely that the carbon is fractured based on my pictures, making it unsafe to ride? I discovered an odd, oval-shaped scratch on my chainstay. I remember my bike being knocked over on the asphalt ...
Nicolai's user avatar
  • 31
3 votes
1 answer
339 views

Carbon rim depth - 44 or 56mm?

I'm looking for recommendations on carbon rim depth considering my use case. Inner width is 23mm and I'll be running 32mm tubeless. For 3 season use in the UK, mostly on (rougher) roads - some hills, ...
krafty1010's user avatar
2 votes
1 answer
427 views

Grease carbon fork before crown race installation?

I have a carbon fork, and a crown race that fits a sealed cartridge headset bearing. I know that in installation of crown races on metal steerer tubes, the use of grease is recommended. I am wondering ...
jayded-bee's user avatar
3 votes
2 answers
835 views

At what level of carbon fiber damage should you have it checked at your LBS?

Today I was clumsy and managed to hit my carbon fork against a fence while lifting the bike over it. There's just a tiny ding, almost not visible without a magnifier and superficial scuffs around it. ...
conste's user avatar
  • 483
4 votes
2 answers
2k views

Glue for carbon fibre

Can anybody recommend a glue (perhaps a type of cyanoacrylate) for bonding carbon fibre? I'm not looking for advice on how to do the repair itself. I just want to know what brand or type of product (...
Jim's user avatar
  • 247
-2 votes
4 answers
242 views

Confidence in carbon bike frame after sealed bearing replacement

You buy a new bike. The bottom bracket makes a funny noise and needs replacing. For many other product categories (computer with a noisy fan, ...), you'd worry you had a lemon on your hand. It would ...
Sam7919's user avatar
  • 9,112
7 votes
1 answer
406 views

Tightening a compression plug - manufacturer says 9-12 Nm, seems too tight at 6 already

First time working with carbon. Bought a longer compression plug, because it came with a very small one, not even covering the whole height of the stem. I tightened it to 7 Nm. Took a while… Made ...
user69725's user avatar
3 votes
2 answers
841 views

Can large bike size will be solved by replacing the crank arm with a longer length?

I recently bought a carbon fiber bike and the size is a bit big, it's sava phantom3.0 56cm ,but I love the bike and don't want to wait too long for small size bike, would a longer crank arm be a good ...
Alexander Gary's user avatar
2 votes
1 answer
205 views

Any help identifying a Focus carbon Izalco with SRAM Red?

Buying a bike from an online listing, and trying to find some information on it. I researched Focus's serial number formatting, but since the release of this bike it has changed, and the serial number ...
JenkemSuperfan's user avatar
0 votes
1 answer
115 views

Does carbon prevention spare a cure?

This site gets, with some regularity, questions wondering whether some small damage to a carbon frame affects the integrity and the safety of riding that bicycle. Here is a chronological sample: 01, ...
Sam7919's user avatar
  • 9,112
2 votes
2 answers
384 views

Unsure if my carbon steerer got damaged from riding with stem attached in wrong position

I am worried that my steerer is damaged and don’t really know what to do, because I feel insecure riding my bike now. I hope maybe you can help me to determine what I should do. I was at a bikefit and ...
user69725's user avatar
4 votes
2 answers
881 views

Do you agree it's safe to continue to ride this carbon bike with a small crack in the frame?

As you can see in the pictures my carbon bike has a crack in the frame, between the seatpost and the corresponding screw. I'm told by my bike shop and by an engineer of the bike manufacturer that I ...
Daniel's user avatar
  • 41
4 votes
3 answers
376 views

Carbon damage to frame after sideway fall

Today, I went out for a ride and had a small crash. I fell down sideways, then came home and realized there’s a small paint chip (which i’m fine with it) but there’s a small dot which is the deeper ...
Eunice Ng's user avatar
5 votes
3 answers
523 views

How should I deal with this splintered carbon steerer?

I made a bit of a mess of my fork's carbon steerer while cutting it: I deliberately cut the steerer around 10 mm longer than I needed it. While cutting, the steerer was secured in a stem up to this ...
Will Vousden's user avatar
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0 votes
3 answers
287 views

Should I upgrade my entry-level bike?

I bought a Cannondale Quick CX4 last year, but I’m not fully satisfied. I want something more robust, fast on the trail, and a better gear set. I’m still eligible to exchange my bike within one year (...
Ciclista's user avatar
4 votes
1 answer
429 views

Scratch in the very top of a new carbon steerer tube. Should I worry about this?

I just wanted to test lowering the stem on my new bike when I discovered quite an obvious scratch at the very top of the steerer tube. This is exposing fibers and inside the scratch feels a little ...
conste's user avatar
  • 483
2 votes
1 answer
2k views

Should I do anything about this minor nick in a carbon fork?

Unfortunately I managed to smack a metal flashlight with quite sharp edges and a bit of movement force against my carbon fork when I wanted to check something on the bike. Although the damage is ...
conste's user avatar
  • 483
8 votes
2 answers
987 views

Are these abrasions problematic in a carbon fork dropout?

Got my first road bike with a carbon fork and when installing the front wheel the skewer slipped a little. Now I got some shiny surface lines there on the carbon surface. I wouldn't even call it ...
conste's user avatar
  • 483
2 votes
1 answer
328 views

Brake residue on carbon rims

I have recently purchased 2nd-hand carbon rim brake wheels and noticed the front rim has what looks like residue from the brake pads stuck in a track the whole circumference of the rim, on both sides. ...
Jamie's user avatar
  • 123
2 votes
0 answers
63 views

Should the seatpost clamp be installed backward for a carbon seatpost in an aluminum frame? [duplicate]

Is it true that the seatpost clamp must be installed backward (i.e. its slot facing the handlebars) or at least with a slight offset to avoid aligning its slot with the aluminum seat tube slot when ...
olliebulle's user avatar
  • 4,119
5 votes
2 answers
715 views

Ultegra R8000 rim brake compatible with Zipp 303 Firecrest?

Update I have successfully mounted a Zipp Firecrest 303 wheel set onto my Cannondale R800 CAAD 4 frame with Shimano BR-R8000 rim brakes. Thanks for the advice! I would like to buy a carbon wheel set ...
sebastian's user avatar
  • 175
3 votes
2 answers
1k views

Worried about chip in carbon road bike frame

I am planning to get a second hand medium range road bike and this is the first full carbon road bike I'm getting. However, upon checking the bike, I can see there is a surface chipping on the top ...
debugger89's user avatar
9 votes
2 answers
1k views

Carbon fiber frames and household heating/radiators: how close is too close?

I have a carbon fiber Giant Revolt that I keep in the hallway of my apartment, near the door. Opposite from where it's stored -- about 2.5-3 feet away, or one hallway width -- there is a hot-water ...
Cerulean's user avatar
  • 1,061
3 votes
3 answers
922 views

Is this a carbon crack or a scratch?

I'm about to buy myself a bicycle but the seller posted there's a slight scratch on the paint. Seems to me it doesn't look like a normal scratch but can be a crack on the carbon itself. Is it a crack ...
Rey's user avatar
  • 31
2 votes
1 answer
187 views

Chip in carbon seat tube?

I pulled out the seatpost on my Giant TCR and notice something like a chip in the seat tube, are defects like this normal?
Luigi's user avatar
  • 21
1 vote
1 answer
250 views

Lots of cracks - safe to ride?

I probably shouldn't have, but I just bought this 2016 CAAD 8 second hand for cheap. I'm trying to work out if it's safe to ride. There are cracks all over the carbon fork (and in the rest of the ...
Matt's user avatar
  • 13
3 votes
1 answer
259 views

How bad/deep is this chip on a carbon fiber bike frame?

Does it cut into the fiber or just some paint chip?
Ning Wang's user avatar
  • 249
1 vote
1 answer
137 views

Are racquets' graphite the same substance as bike frames' carbon?

One of the materials used for tennis/squash/pickleball/... racquets is graphite. One of the materials used for bike frames (and components) is carbon. I gather that both have the element Carbon in ...
Sam7919's user avatar
  • 9,112
6 votes
1 answer
174 views

Misaligned Carbon Rails on Brooks C13 Saddle not aligning to Seat Post Clamp

I have a [VNT Elements Seat Post] (https://shop.vannicholas.com/en/products/vnt-elements-accessories/VNT-Seatpost-Alloy-16-7mm-Setback/11326). This saddle has two bolts at the back and clamps onto the ...
Chasing Lakshmi's user avatar
1 vote
2 answers
703 views

Torque Specification for Brooks C13 Saddle with Carbon Rails

I wanted to know what the torque specification for this saddle (Brooks C13) would be. There is no torque spec/limit information on the Brooks website for this saddle. The concern is that the rails are ...
Chasing Lakshmi's user avatar

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