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Questions tagged [failure]

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5
votes
2answers
117 views

Which kind of test has bike parts to pass to be sold?

This is a question regarding bureaucracy/testing. What are the quality tests / standards that a bicycle and/or its parts need to pass before access the market? I am thinking about Germany/USA and ...
4
votes
2answers
55 views

Failure modes for suspension forks, air and coil

An air suspension fork on one of my bikes starts showing its age: noticeable play, scratches on stanchions etc. It has not become less smooth and does not leak air so far, however. I am starting to ...
4
votes
2answers
155 views

How to tell when to change steel front fork?

I am riding a Dawes made sometime before 1974 and have read in a Swedish report (http://vti.diva-portal.org/smash/get/diva2:694821/FULLTEXT01.pdf) that front fork failure is a not uncommon cause of ...
1
vote
3answers
2k views

Can a road bike stand constant 40km/h for long distances?

I am planning on converting my road bike into an electrical one and I can see that I can get average speeds of 35-40kmh. So I am planning on biking long distances at this average speed. Is it safe to ...
6
votes
2answers
325 views

Fork Failure on Vintage Steel Tandem Bikes - Any insights?

I'm wondering if you guys can share any knowledge regarding fork failure on old steel tandem bikes. I just bought a 1988 Santana Elan tandem. It's in beautiful condition. I contacted Santana to ask ...
4
votes
4answers
186 views

Rear light with failure warning

It is a thing that I noticed even on cars it is missing: when rear lights fail, the driver does not realize it. In bicycles it is much more worse it happens, as the cyclist's own life is more exposed....
2
votes
2answers
742 views

Coaster brake brakes itself

My bike has a coaster brake (pedal brake). I am not sure how it started, but it has just started to brake itself even if I don't do back pedal. It works weirdly that, it is kind of latching the ...
8
votes
3answers
948 views

What percent of crashes are due to bicycle failure?

I find myself avoiding steep/fast downhills. Not because I'm afraid I'll lose control, but because something might happen to my bike that will send me face-first into the pavement. Are there any ...
0
votes
1answer
755 views

Why would the tension screw on a Brooks saddle have unscrewed to zero? What negative effects?

Checking my saddle, the tension screw seems to have bottomed out to no tension applied. I added a small amount of tension to the screw, and the screw seems to have "taken." I've not tested if it ...
7
votes
1answer
1k views

Magnetic trainer failure

I never thought I'd be on the receiving end of a catastrophic failure, but I am and I am left with some questions. While reading on Wikipedia I noticed it says a con of magnetic trainers is that they ...
3
votes
2answers
861 views

Carbon frame strengh

Almost every question Bicycles.SE about damaged carbon frames seems to get the same answer: "the frame isn't safe anymore." How strong of a hit is needed to break a carbon frame? There are little ...
3
votes
2answers
339 views

Definitive reference for tire widths?

Is there a reference/source/method for definitively determining the width of a bicycle tire without actually having it in hand? I ride a 2009 Jamis Aurora which came stock with 32 mm Vittoria ...
2
votes
1answer
549 views

damage to carbon road frame at the seat stay and drop out junction

I just had a crash due to hitting a dog. My carbon fiber frame now has chip the size of a dime at the junction of the seat stay and drop out on the drive side. Should I be concerned about frame ...
2
votes
1answer
762 views

Saddle Rail Failure?

I've been running a non-brand name full carbon saddle for less than a year. It lasted through a couple of crashes and 'cross season. But when my usual ride stopped for coffee, I found out both rails ...