Questions tagged [crack]

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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 ...
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 ...
12
votes
5answers
3k 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 ...
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. ...
9
votes
4answers
9k 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 ...
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 ...
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 ...
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
2k 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....
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
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 ...
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
4k 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 ...
6
votes
2answers
956 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 ...
6
votes
2answers
24k 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
14k 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'...
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 ...
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 ...
4
votes
4answers
948 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
2answers
4k 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 ...
4
votes
3answers
1k 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
3answers
551 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 ...
4
votes
4answers
20k 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
1k 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 ...
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 ...
3
votes
3answers
405 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, ...
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, ...
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?
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 ...
2
votes
2answers
291 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 ...
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
2answers
1k 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 ...
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 ...
1
vote
1answer
526 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?
1
vote
1answer
918 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 ...
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 ...
1
vote
1answer
120 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 ...
1
vote
1answer
196 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 ...
0
votes
2answers
279 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 ...
0
votes
1answer
375 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: ...
0
votes
2answers
861 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 ...
0
votes
0answers
96 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?