Questions tagged [crack]
The crack tag has no usage guidance.
50
questions
6
votes
3answers
1k views
Crack in aluminum seat lug on carbon-aluminum frame
I recently bought this old road bike and just noticed this little crack. Any advice on how to handle this? Can I reinforce it somehow? It's aluminum and carbon fiber frame.
Mahalo,
Casey
2
votes
2answers
149 views
Vertical mark on chainstay?
I bought a used 1990's steel bike the other day and have disassembled it for repainting. However I came across a small patch of missing paint on the drive-side chainstay, which had apparently been ...
7
votes
2answers
1k views
Scratch or Crack?
I'm curious on opinions if this is a crack or a scratch. No crashes. No drops. Yes creaking.
10
votes
4answers
1k views
Questions about cracks in my rim
I see lots of previous questions about cracks in rims, but most of them (1, 2, 3, 4) turned out to be the rim seam. I don't really see the following type of damage discussed in detail with pictures.
I ...
6
votes
1answer
220 views
Big crack on my Schwalbe Marathon Plus tire
Is it still safe to ride the below tire, or should I replace it?
0
votes
1answer
72 views
Carbon crack or cosmetic damage? [duplicate]
I have a new bike and after a bikefit (it was causing me kneepain) I had to raise the saddle and noticed a crack. I only use a torque wrench and tighten it to 4Nm usually so I can't overtighten (4.5 - ...
1
vote
1answer
175 views
Carbon or paint crack
Does this crack look cosmetic or structural to you? It's tiny hairline thick.
UPDATE: I took the bike to trek store and their technician looked at it (I think he simply did tap test) and said he ...
8
votes
2answers
1k views
Frame dropout cracked, what can I do? (Allied Alfa Disc / carbon)
The frame thru axel hole/dropout cracked while using my wahoo kickr trainer.
Is this crack dangerous?
If it is, what can I do?
8
votes
5answers
3k views
Is My Rim Cracked?
Is my rim cracked?
Do I need to replace my rim?
Do I need to replace my wheel? (See left/first picture).
If either 2 or 3 is Yes, what's the most frugal way to go about it?
Notes
This is the rear rim....
0
votes
0answers
103 views
Carbon fork crack?
I have aluminum bike with carbon fork, this is in the front of the carbon fork, it is in both sides of it?
It's a carbon crack or paint crack?
2
votes
3answers
2k views
Does this carbon fork have a crack in it that would make you replace it?
Hello, I dropped the bike from standing and also had a front end collision later. The damage is from dropping the bike from standing because I can see the crack in a much older photo from after the ...
12
votes
5answers
4k views
Is it safe to ride on cracked carbon rims (Zipp 404 Firecrest 2010 edition)?
I've got a set of Zipp Firecrest 404 Tubulars (2010). I went over a pothole recently but did not crash. It was a pretty big pothole. After going over the pothole, I heard a rubbing sound from the ...
20
votes
2answers
3k views
Is this rim still safe to use?
I bought it this way without the seller noting the issue, so experience from riding with these is zero. Rims are Ritchey Girder OCRs. The crack is pretty small, but noticeable, and I will be running ...
8
votes
2answers
3k views
Can this rear wheel be straightened or does it need to be replaced?
This happened on a month old hybrid bike with 350km on it. I unluckily got the back wheel stuck in a grille when getting off a sidewalk. The wheel now wobbles a lot and keeps hitting the rear V-brakes ...
0
votes
2answers
404 views
Looking for advice - cracked rear hub along bearing races - How to buy a new rear wheel?
TL;DR below
My bicycle is an old used Trek hybrid (1994?) that I got a few years back. When replacing the tires recently I discovered that my rear axle was significantly bent (not surprising for a ...
2
votes
4answers
2k views
Scratch or damage on carbon frame
I found this 'scratch' on my carbon frame on top of the front derailleur. Not quite sure when or how it appeared. Could this be more than a scratch?
4
votes
3answers
2k views
Repair frame with crack by seatpost clamp
Is it feasible to repair a crack in a frame around the seatpost clamp? Being an aluminium frame I understand soldering is problematic. It doesn't matter if seatpost is fixed in place as per a solution ...
4
votes
3answers
1k views
Is this crack on my seat stay mechanically safe?
Recently picked up a steel frame and realised there was a crack on one side of the rear triangle, right by the seatpost. Crack seem to be contained towards the outer part of the tube so does not seem ...
4
votes
4answers
1k views
WTB Horizon 47c - small crack in the middle of the tire
I’m headed off on a 3 week bike trip and just now noticed a small hole in the middle of running tread of my front tire. I have a few more days before heading off into a more remote area and wanted to ...
4
votes
1answer
1k views
A carbon fracture or a paint crack?
I’ve spotted this crack on my carbon fork, only on the left side. The crack is exactly at the joint of aluminum dropout and carbon body of the fork. My bike is a 2010 Trek Madone Project One (OCLV ...
1
vote
1answer
271 views
How to fix a crack in a silicone grip
I have a brand new pair of silicone grips. Somehow, one of the grips got a crack. Its mostly an aesthetic issue, as no fragments of the grip where lost.
Is there any glue appropriate for silicone to ...
2
votes
2answers
310 views
Is this cracked?
I am buying a bike from eBay and before I bid on it I just wanted to know what you though about one of the pictures. The bike is carbon and it looks like some paint has come off. What do you think ...
1
vote
1answer
600 views
Paint scratch or carbon crack?
I might just be overly paranoid, but does the line in the image (to the left of the glare) look like a paint scratch or could it be a sign of a spreading crack?
2
votes
2answers
2k views
Noticed a scratch on my carbon steerer, should I be worried?
Pictures: https://imgur.com/a/0cWtcsS
My nail gets caught in the center and it feels sort of rough. I had my stem tightened at 4NM and the headset seemed to be properly adjusted. I have once ...
4
votes
2answers
5k views
Cracks on tire - still safe to ride?
I just experienced some uncommon cracks on the tires (Schwalbe Durano Plus)
The tires are pretty new (less than half year old, and used max. 1500 km).
I inflated 6 bars in the tire, and according to ...
11
votes
2answers
5k views
Crack in fork or just paint
Yesterday I saw something like a crack in the carbon fork of my roadbike. Now I don't have any clue if this is a really a crack or just the paint.
Maybe someone can help me or tell me how to find out. ...
7
votes
2answers
1k views
Paint crack or more?
I am looking to buy a used bike: a Cannondale Super Six Evo. The seller has sent me a picture about which I am not sure what is wrong. It seems like a paint crack, but can experts share their opinion? ...
6
votes
4answers
5k views
Crack/fissure in the headtube
My 2007 Ghost AMR 5700 developed a crack or fissure at the upper end of the headtube. I do not know whether it developed over time or whether there was a specific event leading up to it; it looked ...
2
votes
1answer
2k views
Cracks on the side of fairly new tire
Today I noticed that the sides of my rear tire has these cracks
The tires have been installed last June, and since then have always been used at the proper pressure (initially at the low end of ...
2
votes
1answer
2k views
Very loud cracking/creaking sound on the bike?
On bumps a very loud click sound comes from somewhere on my bike.
When I have my weight on the seat and there is a bumpy road, it's a scary loud noise since 2 days. It developed slowly since one ...
6
votes
2answers
967 views
Cracked frame riding into the back of car, what's salvageable?
Stupidly rode into the back of a car, due to a moment's inattention. I pretty much hit it at full pelt, though I was riding uphill at the time.
The frame cracked, as this photo shows. Any idea what ...
8
votes
2answers
2k views
Is this a cracked frame?
Here's a pic of my Rocky Mountain Altitude 750 2014. It's the area where the top tube meets the down tube / Bottom bracket.
Is this a cracked frame or just cosmetic problem?
Thanks
8
votes
5answers
4k views
Cracked chainstay weld -- now what?
Yesterday while riding my Surly Ogre around town I noticed that it was making a weird metallic popping noise on the left downstroke. When I got home to take a look I was rather surprised to find that ...
3
votes
1answer
3k views
How to check carbon frame for cracks
Yesterday, a little boy hit my carbon framed road bike with his little bike while I was already standing. He was not very fast, the normal 'little-boy-dreaming-on-his-bike'-speed. So, nobody got hurt, ...
7
votes
1answer
1k views
Cracked seat post
Just been cleaning my Canondale CAAD8 and noticed these cracks in the seat post - they look like cracks in some kind of outer covering and wondering if someone can tell me how much of a problem they ...
7
votes
1answer
1k views
Rim cracks on spoke adjustment holes, how much should I panic?
So I have a RODi Rims SKORPION rim and I've noticed that there are cracks on the holes for spoke adjustment. They all appear to be on the left side of the bicycle and I'm not sure if they were here ...
4
votes
3answers
610 views
Did my bike frame crack?
during my morning ride today, I slipped and fell down, and as a result, a crack formed on my carbon frame. I have checked the entirety of the bike and this is the only crack, but I am not sure if I ...
0
votes
1answer
404 views
Left crank cracks when the left pedal is pressed
My crank has a little slack and cracks more and more when I pedal, but only on only with the left pedal.
What could be the cause(s) of this ?
Video of the loose crank:
...
5
votes
3answers
3k views
Should I ask for my money back - crack in Titanium frame
About 2 years ago I got my new bike - an Enigma Ti bike. The frame was customised for Di2 and I had hydraulic disk brakes fitted. An expensive bit of kit that was supposed to last forever and make my ...
1
vote
1answer
1k views
Crack on Carbon Frame?
I see a crack on the carbon frame of my bike
https://www.dropbox.com/s/flqrue2plzyqki9/DSC_0118.JPG?dl=0
The bike is around 4 years old but I just notice the crack line now. I think there was ...
3
votes
3answers
421 views
Crank axle cracked on 1972 Centurion, looking for guidance on how to replace
As I said, I have a 1972 Centurion. Today while riding I hit a pothole as I was coming down on my left pedal. I immediately felt like my pedal was moving around in ways it shouldn't. Stopping to look, ...
4
votes
4answers
22k views
Should I worry about a chipped carbon mountain bike frame?
The other day while I was racing my Specialized Stumpjumper I noticed a chip on the frame. It's on the rear support bar right behind the seat post between the rear tire.
My teammate who is a mechanic ...
4
votes
1answer
2k views
What caused this seat clamp / frame failure?
Here's my "long distance" ride, which is an old steel MTB without suspension.
I picked it up by the saddle to move it and felt some play, I thought the saddle rails might have been loose, but as per ...
6
votes
2answers
26k views
Is it safe to ride on cracked tyre?
I have a cracked tyre on my Road bike. I think I put it in the gazebo and exposed it to the sun.
It's cracking along the tyre wall, in continuous fashion.
Would it be safe to ride on those crack ...
5
votes
6answers
15k views
What can I do about a cracked frame?
I noticed the other day that my frame has a crack in it! I believe that it's my seat post causing the problem. A couple of questions really, a) how serious is this? and b) can it be repaired?
Edit: I'...
9
votes
4answers
10k views
Titanium frame has a crack - advice needed
I've found a Titanium bike frame on eBay. It's very cheap and the owner says that it has a very small crack on the seat tube where it connects to a bottom bracket. See in the image above:
I've never ...
1
vote
2answers
2k views
Carbon frame cracks
I have a 2010 Gary Fisher Cronus, when I brought the bike in for a tune up this spring the bike shop told me they wouldn't do it because of cracks around the seat post. They pointed out that I had my ...
0
votes
2answers
882 views
FSA Gossamer Crank Spider cracked
I've got an FSA Gossamer pro MegaExo compact crank set. Lately, while tightening the bolts on the crank spider, it cracked (see picture). I know FSA has recalled the left crank because it turned out ...
24
votes
8answers
7k views
I keep breaking my road frames - why?
I've gone through four five frames in the last decade or so, all from different manufacturers, all steel but both lugged and welded both steel and aluminium. Every one of them has eventually developed ...
5
votes
1answer
2k views
Experience with welding Titanium frame?
My Litespeed Tachyon, a 1996 model, of which I am the second owner, (So Litespeed will not honour the warranty) has now developed its 3rd crack.
First was in the seat tube above the deraullier and I ...
