All Questions
20 questions
8
votes
1
answer
2k
views
Accidentally punctured through aluminum frame with a screw tip - still safe? Repairable?
I went to tighten up my rear rack and realized that it was actually a screw not a bolt holding one of the arms on my rear bike to my frame. Apparently I stupidly used a screw that's longer than the ...
- 81
2
votes
2
answers
532
views
Are these scratches in my aluminum frame structural or purely cosmetic?
My aluminum bike (Cannondale Adventure 1) was scratched on the welds connecting the seat tube and seat stays, and I was wondering if the damage is purely cosmetic, or if there is any structural damage....
- 617
1
vote
0
answers
94
views
Magnitude of load and cycles needed during testing of bike forks
I want to do a structural test on bicycle forks. Is there any specific criteria I need to follow of what should be the magnitude of the significant load and also how many cycles would need to be ...
- 11
11
votes
4
answers
2k
views
I have a question regarding the structural integrity of my aluminum frame after its having... incurred damage;
Apologies if this has been covered previously, but I didn't see it if it had been, and at this point I'm at a loss.
For context, the bike in question is this year's Haro Double Peak Sport 29
https://...
- 111
2
votes
2
answers
472
views
How unsafe is it to ride a bike with this dent in aluminium top tube?
This didn't happen as part of a crash. In fact, I'm not sure what might be the reason. I just looked down and saw this while riding on a sunny day. My bike is always in my room and I live alone. I sit ...
- 661
2
votes
5
answers
1k
views
Would It be fatally dangerous to ride with this dent [Pictures]?
Hello fellow cyclists,
I have had a crash recently and there's a minor dent at the top tube. The manufacturer (Canyon) is telling me it'll take them 8 weeks to make an appointment for me to replace ...
- 21
6
votes
2
answers
2k
views
Is my carbon frame done?
I have a carbon trek Emonda bicycle. Today, my rear derailleur got caught in my wheel. As a result, the rear derailleur is bent, the rear derailleur hanger snapped off, the chain got twisted and the ...
- 277
6
votes
3
answers
814
views
Does a highly visible frame colour improve safety significantly?
Studies have shown that wearing hi-viz colours, particularly on moving extremities such as one's feet, coupled with hi-viz helmets and cycling shirts, increases the chance of been seen by a driver ...
- 215
0
votes
0
answers
166
views
Dent in Lower Aluminum Frame Of Cannondale Cyclocross
Recently purchased this bike second hand. How concerned should I be of this dent? It’s about midway down the lower frame.
- 1
4
votes
2
answers
588
views
Void in carbon frame seat tube, is it dangerous? [closed]
While assembling a carbon bike, I found this void in its seat tube. It's about 1/2 inch X 1/4 inch in size and I'm guessing almost a third to half the depth of the tube wall.
Since it's right next ...
- 41
1
vote
4
answers
324
views
Can this frame be used or is it done?
I have a cheap mens Huffy mountain bike which I noticed has 2 holes in the frame. Would this be too unsafe to ride?
- 247
3
votes
2
answers
2k
views
Help please - Dent in top tube of double butted aluminium frame
I have a ridgeback velocity which is labled as double butted aluminium. Around the middle of the toptube is a dent shown in the photo. There is also a short line above it which I can feel with my nail....
- 247
1
vote
1
answer
279
views
Frame with dent
I recently bought a bike and then realized it had a dent on the top tube. I would like to know your opinion if it is safe to ride. The bike is a Devinci Cameleon made from double butted aluminium. The ...
11
votes
4
answers
3k
views
Banged frame: Is it still safe to use?
My girlfriend's bicycle was vandalized by a neighbour. It seems like they banged it with a hammer or something right in the middle of the frame. Is this still safe to use?
- 111
25
votes
4
answers
4k
views
Can road bumps excite frame eigen frequencies?
During my last bike holiday I have happened to ride downwhill on roads which had transversal stripes to mark the approaching of a turn.
The stripes were made with road paint, and were slightly higher ...
- 7,311
0
votes
1
answer
778
views
Panniers on front suspension forks [duplicate]
I currently have four panniers (two front, two rear) on my touring bike and plan to purchase a new touring bike which comes with front suspension forks. Is it possible and if so, safe to add front ...
- 61
5
votes
3
answers
984
views
What's this part of the bike, and is it safe to alter it?
The video shows someone installing a gps bike tracker, however there is not much room in the top of the head tube, so he hammers down what's already in there in order to make room for the tracker.
In ...
- 53
7
votes
4
answers
1k
views
Fracture in folding frame - safe to ride?
I cycle every day because I live in a city and I find it a fun, fit and convenient mode of transport. I am not a cycling hobbyist, am only averagely fit and know pretty much nothing about bike ...
- 691
3
votes
4
answers
7k
views
Is it safe to ride with bent fork?
My bicycle went from this when I bought it:
To this when I crashed (note the front fork bent where it attaches to the stem; front wheel almost touches the down tube):
Update: Just looked at the ...
- 924
19
votes
11
answers
29k
views
Is there such a thing as frame failure?
Several general questions have been asked regarding how long a bike or bike frame will "last", and the gist of answers seems to be that a bike can last quite a while if the replaceable components are ...
- 1,444