Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [safety]

Riding safely, safety equipment, and safe places to ride.

2
votes
2answers
85 views

Axle is too short

I recently bought a second hand bike which was originally sold with a flip flop hub to fix up as a project. The person I bought it from gave me a rear wheel with a geared hub. However, when I put ...
8
votes
4answers
3k views

Why is an old chain unsafe?

I recently took my bike in for a service and the mechanic urged me to replace my chain, potentially at great cost (might need a new wheel). He said it might jam or pop off. He couldn't explain to me ...
5
votes
2answers
127 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 ...
2
votes
1answer
122 views

How to repair pedal snapped off crank arm? [closed]

The pedal snapped off the crank arm and there is a portion of it left inside. How do I dig this out and replace the pedal?
7
votes
3answers
1k views

What is the drag / power lost to a safety flag?

I have a recumbent bike that has a safety flag on the top of a thin pole, so it flutters around higher than and after my head. How much power am I losing to this flag that could be used to power my ...
20
votes
6answers
7k views

Should unconventional colors be avoided for lighting?

Red/amber lights in the rear of the vehicle, white lights, in front of it: that is the good old convention and certainly switching their places is a bad idea. A quick search, however, shows other ...
1
vote
1answer
120 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 ...
10
votes
4answers
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?
11
votes
4answers
3k views

Roadbike with aluminium wheels in mountains. Is it safe?

I'm planning my upcoming trip to ride real mountains in Spain on my road bike. So far I used Mavic Ksyrium aluminum wheels but mostly on flat areas. I'm not confident with going downhill on this ...
4
votes
2answers
171 views

How do I determine what types of maintainence I need to perform?

I just got a new bike and I want to make sure I’m able to keep it up properly. I am entirely new to this. Edit: thank you all for your responses, I’ll keep these all in mind and I’m adding them to my ...
3
votes
4answers
315 views

In cycling friendly cities, how do near-sighted cyclists who need glasses manage to bike to work or school in the rain?

In cycling friendly cities, how do near-sighted cyclists who need glasses manage to bike to work or school in the rain? When I say cycling friendly cities, I'm referring to cities such as Utrecht, ...
23
votes
4answers
3k 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 ...
3
votes
2answers
99 views

Third eye helmet mounter mirror swivels too much

I've got a "third eye" type bike mirror attached to my helmet. It has two points of articulation: one near where it mounts to the helmet, which controls how far it swings up, and the other near the ...
7
votes
6answers
361 views

Can I run a red light at a T junction?

I was wondering if I was on a bike could I run a red light if it is impossible for me to get hit by a car? (Unless the car drives into the bike lane). I made a quick picture on paint to try and show ...
0
votes
1answer
146 views

Would the airzound bike horn cause hearing damage even if used well under the duration limit? [closed]

Would the airzound bike horn cause hearing damage even if used well under the duration limit? The Airzound is 115 dB which means according to the NIOSH standard, the duration limit is 28 seconds ...
6
votes
3answers
762 views

Safety guidelines when using MTB clipless pedals on a road bike

Yesterday, I went for a ride and my legs felt really great (hadn't been cycling for about 2 weeks) so when I was climbing on a hill, I decided to go on a full blown sprint and unfortunately... somehow ...
2
votes
1answer
258 views

My friend wants to sell a second hand helmet, I strongly dissagree, am I correct?

My friend has recently purchased a new bike. The guy who sold it to him was clearly giving up the sport, so he gave to said friend his helmet as well (MET parachute for MTB). As my friend already had ...
2
votes
1answer
410 views

Are full carbon forks less prone to failing from hidden defects than those with alloy steerers?

Are full carbon forks less prone to failing from hidden defects than those with alloy steerers? Even though the mechanics couldn't find problems with Richard Stanton's bike, his fork failed ...
0
votes
2answers
91 views

Bent front wheel

I own a 27.5" mountain bike and its front wheel is a little bent. Not too badly, but it is noticeable when riding or spinning the wheel. It probably wobbles about 1/4" or so. I have disc brakes, so it ...
0
votes
3answers
1k views

OK to ride with a slightly bent mech hanger?

My rear derailleur took a knock from a fall, and the entire shifting range moved inwards by about one sprocket width. I suspect, but am not sure, that the mech hanger got slightly bent (could be ...
1
vote
1answer
72 views

Best rear view mirror to purchase? [duplicate]

I have seen a lot of different types of Rear View mirrors. Ideas on which mounting/type is most used and why? ie: sunglass frame mounted, helmet mounting, handle bar mounting, or others. I ride both ...
6
votes
3answers
346 views

Clipless pedals (safety release)

Is there a safety feature in any brand of clipless pedals which allows the mechanism to release in the event of an accident? For example, being hit by a car in traffic while commuting, I would hope ...
3
votes
6answers
452 views

Is it a problem to have tires of different width?

I received a new tire for my bike. I believe this is a "Hybrid bike" in English and looks more or less like that image courtesy of Wikimedia I use it to commute, 50% on bike paths and 50% on easy ...
3
votes
3answers
147 views

Precautions when riding in long-term low visibility

Heavy fog or a narrow, overgrown and winding trail, can reduce visibility to 3 meters. Those conditions can continue for hours, and the safest approach 'don't go' cannot be always taken. I find that ...
4
votes
2answers
161 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 ...
4
votes
4answers
801 views

Why do only downhill mountain bikers wear full face helmets?

A lot of cyclists are concerned about safety and having the proper equipment, but I have never seen a cyclist riding in the city with a full-face helmet, nor have I seen a full-face helmet marketed ...
3
votes
4answers
244 views

Bike or e-bike/trike good for the rain

My aging mom is looking to start biking to work as a way to stay healthy. But as an aging women she needs certain things so that she feels safe and comfortable riding a bike about 15 minutes each way. ...
2
votes
3answers
585 views

It is dangerous to bike with 5/36 spokes broken?

I've got an old bike (not a sport bike, just an old fashioned granny bike). The chain was super loose so I have to tighten it, the tires are fine. The rear wheel, although reasonable aligned for how ...
16
votes
4answers
4k views

Coded gesture for “I am looking for a place to stop”

When going downhill on mountain roads with no dedicated cycle path, it happens quite often that the cyclist becomes the head of a train of vehicles, as the winding road does not allow an easy and safe ...
4
votes
2answers
282 views

How necessary are barrel adjusters?

In the process of getting the slack out of my rear brake cable, the "cap" on the insulated part of the cable pulled out of the barrel adjuster. While monkeying around trying to get that part of the ...
7
votes
2answers
407 views

Effect of helmets and other impressions of the bike rider on driver behaviour?

Are there any studies on the effect of helmets and/or other impressions of the bike rider, on driver behaviour? Has anyone collected their own data on things like this? Has anyone noticed any other ...
1
vote
3answers
210 views

How should I approach safe cycling? [closed]

I have interest in biking to and from work, but have heard some horror stories from cyclists at work. Short of asking coworkers on safe cycling practices, where should I go for a more authoritative ...
8
votes
1answer
148 views

Why would a salty damp road be slipperier than the same road just damp?

I came off this morning* on a road I ride every day, in all weather conditions. Last night was frosty so the road was salted/gritted, but there was no visible frost nearby, it had warmed up from the ...
7
votes
4answers
375 views

Are there any major outstanding recalls of bicycle parts?

Sometimes bike companies don't get things right. Are there any major recalls people should know about? Where can people find information on recalls? There is one answer which has places to find ...
7
votes
2answers
236 views

Can I ride side by side with another cyclist in Switzerland?

When I ride on the road with someone (in the country), I try to ride on his side, and then when a car comes, I pull back in. This way, we can talk and have more fun during the trip. Sometimes, I don'...
1
vote
2answers
328 views

Wheel spoke reflector Flectr

Winter is comming, days become shorter, need extra visibility for darker times. Have somebody used Flectr zero reflector (https://shop.flectr.bike/collections/reflective-products)? Is it worth the ...
1
vote
2answers
205 views

Is it safe to attach a flashlight to a helmet?

Everything I've found online discussing this has focused on the benefits and dangers of attaching a metal mount to the helmet, on which a flashlight would be attached. I'm using a soft mount (...
6
votes
2answers
2k views

Max weight of child, for rear bike seats - why is it always (seemingly) 22kg?

I had a rear child's bike seat on my old bike (which was stolen, boo hoo). It was a Yepp Maxi and was the kind that sits on a rack, rather than being mounted to the seat post. The maximum weight ...
-3
votes
2answers
145 views

Hearing the outside world through headphones

Wearing headphones to listen to music whilst cycling can be dangerous. SO What if whilst listening to music with headphones, we could utilise the headphone's or even the smartphone's mic to fade in ...
1
vote
1answer
142 views

Can I remove the clutch system from bike helmet?

I recently bought a Kali Chakra Plus helmet for my bike. This is the link with the specs. It has the inner clutch system made from plastic in order to adjust the fit which is plastic and onto which ...
3
votes
1answer
842 views

On recumbent trikes, vs road bikes which is safer down hill?

Tadpole, vs delta have different tipping modes. Does the three wheel configuration give a false sense of stability? Are rocks on the road more or less of a risk on a Tadpole vs Delta vs Road/Mountain ...
1
vote
2answers
579 views

Top speed for Cannondale Bad Boy

I have a 2015 Cannondale Bad Boy 3. I'm planning on making a trip tomorrow that goes across a very long, fairly steep road (It's almost completely straight). I've had the bike for about six months, ...
1
vote
1answer
185 views

Lighted ankle straps

I read an article in the Wall Street Journal about a recent study that concluded that motion-based lighting is the most effective technique for drawing motorists' attention. I believe the recommended ...
-10
votes
2answers
249 views

is bicycle helmet actually safe? [closed]

The bicycle helmets are almost just made by styrofoam and many people use it instead of motorcycle helmet with full protect and plastic,metal parts.the truck can easily crush it and almost helmet are ...
0
votes
1answer
324 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 ...
8
votes
3answers
652 views

Are children's helmets with styling less safe?

In a couple well received answers to a recent question it is suggested that sliding on the road is an important consideration for helmets. A number of children's helmets now are available with spikes ...
0
votes
1answer
81 views

Only rear cross lever on bullhorns

I'm newbie. I have bullhorns with two TT levers. For safety, I'm considering installing cross lever(s). I'd like to install only the rear-wheel cross lever since: Setup will be less clumsy When my ...
1
vote
1answer
386 views

Who has the right of way crossing a shared pedestrian crosswalk / bike path? (USA)

I pass this intersection (and others like it) at least twice per day on my way to work and I'm still a little unsure who should stop for whom. The little yellow star indicates the "bike path", which ...
1
vote
1answer
388 views

Brake levers for bullhorn on single speed - tt/cross or both?

I'm newbie. I need advice regarding brake levers for bullhorn on a single speed. I ride both flat and bullhorn ends. Do I need both TT levers and cross levers? What do you use? Bonus questions: ...
7
votes
1answer
258 views

My handlebar and My front tube are no longer one. Might I have died?

So, I have this problem [problem]. This happened today while I was putting it in a car to store overnight, but clearly I have to fix this. Could someone please tell me: what exactly qent wrong ...