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Questions tagged [safety]

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

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How far a damaged rim can be taken safely

While riding last week, I was going over an obstacle at speed and I did not manage to lift my back wheel, therefore think I damaged the rear rim. Since the damaged is looking minor, how far is it safe ...
uhetz's user avatar
  • 133
6 votes
2 answers
379 views

Material chipping from fork dropout. Still safe?

I have a 10 year old Suntour suspension fork where some of the material on the dropout has started to chip and fall off. I think it has happened because of some harsh winters with lots of road salt. ...
user1049697's user avatar
  • 4,312
27 votes
4 answers
3k views

Staying out of the blind spot of a truck that has camera "mirrors"?

As a little kid, I learned a simple rule when cycling around trucks, vans and buses to stay out of their blind spot: "If you can see the driver, the driver can see you". When stopping at an ...
Tinkeringbell's user avatar
4 votes
3 answers
628 views

Recommended wall thickness on rims with caliper brakes

I have caliper brakes on my 700C road bike wheels. I notice that the surface of the rims, both front and back, where the brake pads make contact is starting to look a little worn (after eleven years). ...
Lummo's user avatar
  • 43
2 votes
3 answers
170 views

How much protection would a motorcycle jacket provide in a low speed, ebike accident?

How much protection would a motorcycle jacket with CE certified body armor provide in a sub 20mph/32kmh, ebike accident? I'm particularly interested in the following scenarios: A car running a stop ...
Peachy's user avatar
  • 125
7 votes
2 answers
856 views

Is it unsafe to put a stoker stem on the front?

This year my wife and I bought a used tandem and have been having fun. We like long rides on our singles, but the tandem cockpit is uncomfortable for me. I'd like to put an extra-long stem on the ...
Wesley's user avatar
  • 173
4 votes
4 answers
2k views

Time for a new tyre?

On my ride yesterday the rubber on my tyre seemed to rip away revealing the second layer of the tyre. I was wondering whether this would still be safe to ride on. Maybe the tyre is less puncture-...
JayP's user avatar
  • 243
2 votes
2 answers
340 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....
Peachy's user avatar
  • 125
11 votes
4 answers
3k views

Is it safe to have pedal cage reaching wheel when slightly turned?

This setup doesn't look good to me. If the wheel can touch the pedal cage in when the pedal's in its forward-most position, it could cause me to come off the bike. I have come off recently, I think to ...
Matt's user avatar
  • 977
3 votes
3 answers
1k views

How long can I use a bicycle helmet?

My helmet for road cycling has seen some good use and I was considering to replace the padding because it is falling apart, but at this point I was wondering myself: Should I even keep the helmet? I ...
DoNuT's user avatar
  • 4,481
6 votes
3 answers
2k views

What is the role of the "safety plate" on a Shimano Hollowtech II crank?

The left crankarm of an HollowTech II crank has a little part called "safety plate" (number 4 on the drawing below). What is exactly its role, and what kind of 'safety' does it offer given ...
Rеnаud's user avatar
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5 votes
3 answers
2k views

What is a safe weight for front rack + luggage for a steel race bike fork?

I frequently commute with a backpack on my '90s steel race bike, and encounter the usual issues of sweaty back and tired shoulders. The riding position is also not perfect for carrying a backpack on ...
goose_lake's user avatar
2 votes
4 answers
236 views

Prepping for winter riding: Hills

This isn't necessarily a gear question, as there's myriad articles & arguments over the best tires, pressure, brake pads, etc. Rather, I consider it more of a technique question. My daily commute ...
bitmapped's user avatar
1 vote
1 answer
57 views

Used mongoose BMX started having issues with rear sprocket not engaging when pedaling causing safety issue

I got a used Mongoose BMX for my son. I know when I was younger Mongoose was halfway decent. But now they kinda stink. Putting that lightly! Anyway the bike rode well at first, then after a flat tire ...
Stewart Spindlow's user avatar
2 votes
1 answer
649 views

Is it generally safe to ride on with a puncture like this?

I had a puncture on my big ride yesterday that hurt my tire and even the carcass quite visually. In the end and due to lack of options to source a fitting tire on a Sunday in more remote Alpine ...
DoNuT's user avatar
  • 4,481
3 votes
6 answers
948 views

When does the braking power stop scaling with Rotor Size

It's commonly established that the braking power scales with rotor size, and an optimal braking technique is to provide enough force for the rear wheel just to lift up. However, my question is wouldn'...
isotope's user avatar
  • 33
4 votes
1 answer
154 views

Are these hairline cracks on an aluminum wheel dangerous?

I have an older aluminum rear wheel that has a continuous line of hairline cracks. The hairline cracks proceed in a circle around the wheel on both sides of the wheel. The front wheel does not display ...
Chris Foster's user avatar
5 votes
1 answer
2k views

Started to drill into alu frame - how bad is it?

While attaching an equipment on my bike, I accidentally started to screw into the bike frame. I only realized a few weeks later when I dismounted that said equipment. I'm pretty sure I used a ratchet ...
SaltyVinegar's user avatar
2 votes
2 answers
190 views

I have a Weeride child seat (mounted on top tube). I worry that if the handlebars turn suddenly, they will hit my child. How can I manage this risk?

I have a Weeride child seat, mounted atop my top tube. I am concerned that if my handlebars turn abruptly, they will stab my child (please do say if there's a better term for this than stab). How do ...
pateksan's user avatar
  • 2,364
11 votes
4 answers
4k views

Bike too large, if I change the wheels to a smaller size will this lower the height?

I've got a second hand Raleigh racing bicycle. The frame is too big, when I stand on the bike, off the seat, my toes only just touch the ground. I'm not thinking this is safe to ride around London. I ...
K C's user avatar
  • 111
8 votes
2 answers
1k views

Safe to remove plastic chainring cover?

I have a bike with a Shimano Tourney 2x chainset (this one) and the plastic cover that sits on top of the outer chainring has started to creak whenever the driveside crank is under load. Is it safe to ...
theplanlessman's user avatar
8 votes
4 answers
1k views

Ways to find a safe route on flooded roads

Recently during my cycling holiday I have been riding after a severe thunderstorm in the countryside, which meant the roads where covered in running muddy water and some underpasses had 5-6 cm of ...
L.Dutch's user avatar
  • 7,131
3 votes
2 answers
205 views

Slipping handle bar, how to torque safely

I ride a bow shaped handlebar mounted in quill stem. I am riding this with a somewhat sporty setup, which means I do have weight on my hands and thus handlebar grips. Originally I torqued this to 8Nm....
Superman.Lopez's user avatar
-2 votes
1 answer
78 views

What was your worst bike accident, and how could it have been prevented? [closed]

How can we improve our safety? We can lean from past accidents or near-accidents. Most of us are able to share relevant experiences. Could the incidents have been avoided, in hindsight? What can we ...
Peter - Reinstate Monica's user avatar
15 votes
3 answers
7k views

Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower?

Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower?
Bluelobe's user avatar
  • 159
5 votes
3 answers
1k views

Stem top bolt wouldn't screw in after transport

I transported my bike via plane in a canyon shuttle 2. It was well secured and safe. To pack it up I had to unscrew the top stem bolt and unhinge the stem along with the handlebars. Once I attempted ...
Ivan's user avatar
  • 661
1 vote
0 answers
91 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 ...
Dan's user avatar
  • 11
4 votes
2 answers
173 views

What is the status of brake lights? seems like a decent idea? inadequate solutions? [duplicate]

I'm familiar with bicycle brake lights but not sure why they aren't more common? What is the public perception, if any? Or not the public but more serious cyclists like we find here? There are a ...
Fred Goldfarb's user avatar
12 votes
5 answers
3k views

Are wider tires better on ice?

Assuming there are no studs, would a wider tire be safer on tarmac with pockets of ice? How does also the profile or other features of the tire impact this?
nightrider's user avatar
  • 7,859
10 votes
5 answers
2k views

Why don't my studded tyres grip on ice?

For the first time in my life, I have had stud tyres installed on my bicycle, because I've nearly killed myself bicycling the last few winters, no matter how slowly and carefully I go. It seems like ...
Dren's user avatar
  • 117
5 votes
1 answer
527 views

Is it possible to use a 26mm clamp diameter stem with a 24mm handlebar?

I am considering getting a stem, which is meant for a 26mm grip area diameter. However, the handlebar I want to use it with is 24mm diameter (this diameter is uniform, so 24mm both at the grip and at ...
goose_lake's user avatar
1 vote
1 answer
253 views

Lots of cracks - safe to ride?

I probably shouldn't have, but I just bought this 2016 CAAD 8 second hand for cheap. I'm trying to work out if it's safe to ride. There are cracks all over the carbon fork (and in the rest of the ...
Matt's user avatar
  • 13
10 votes
9 answers
7k views

Why are there no snow chains for bicycles?

My last bicycle trip was a complete nightmare. Snow and ice everywhere, with no plowing anywhere. It made me re-realize what I already became all too familiar with last winter: it's a scary nightmare ...
W C's user avatar
  • 133
1 vote
0 answers
78 views

What's bad about dork disk/pie plate? [duplicate]

Why is this part, supposedly a failsafe to protect the rear wheel in case of damage or poor adjustment of the rear derailleur, so often maligned? Are they ineffective, or do they cause some ...
SamA's user avatar
  • 2,696
6 votes
6 answers
4k views

Is cycling an aerobic or anaerobic exercise? What is the effect of cycling on weight loss?

I like to do cycling and I want to lose weight through cycling. But my friend told me about cardio instead of cycling, since cycling burns calories at a much slower rate. Is it true? So what's better ...
Santic's user avatar
  • 119
7 votes
4 answers
2k views

Is it safe to ride after innertube bulged out (returned to normal after deflating)?

I recently inflated a tire to 50 PSI. The tire/innertube is recommended to inflated to 30 to 80 PSI (standard tires on RadWagon 3). At 50 PSI however, the innertube started bulging to the point that ...
karmin-pho-er's user avatar
11 votes
4 answers
6k views

Are winter tires (with studs) safe to use in summer-like conditions?

The climate where I live is such that you may get snow or even true ice one day, but it will be dry gravel and tarmac on another. I understand that winter tires would not be ideal on these, but ...
nightrider's user avatar
  • 7,859
30 votes
3 answers
6k views

Pack of dogs - best response to owner?

Yesterday 5 large pit bull/lab mix dogs came after me, had to get off the bike and use the bike as a physical barrier between me and them, the owner eventually came out, but I have no idea what would ...
batflaps's user avatar
  • 471
1 vote
0 answers
46 views

Schwalbe tires stored in a dark humid basement for over 10 years: possible to tell if they're safe to ride? [duplicate]

I have a pair of never installed Schwalbe tires that have been hanging up for about 10 years in my dark humid basement. They have not seen the light of day in all that time. When I examine them ...
Tim's user avatar
  • 1,146
6 votes
2 answers
268 views

Safe to Ride Tires Packaged for Two Years?

Below is a picture of two Continental 5000's that were kept in their boxes for about two years: They were kept out of direct sunlight inside a house that was not climate controlled. The tires feel ...
Shawn Eary's user avatar
12 votes
6 answers
6k views

Why do fixies (fixed-gear bicycles) have one brake on the front?

I've recently started riding a fixed-gear bicycle and I love it. It's simple, light and fast. However, being new to "fixies" I have two brakes with a drop-down bar, like a road-bike. It just ...
Fandango68's user avatar
  • 1,282
8 votes
1 answer
253 views

Do bicycle stems have certified usage ratings (road/XC/Enduro/DH)?

Clamping dimensions aside, are all stems rated for all the cycling disciplines, especially in the MTB domain? In other words, are stem manufacturers liable to guarantee their products to be safe to ...
Grigory Rechistov's user avatar
0 votes
0 answers
295 views

Should every cyclist feel a resonance frequency at a given speed?

On a stand When I hoist the bike on a stand and spin the rear wheel with all I've got on the highest gear, then sit back and watch it slow down gradually, there is a point where the bike + stand start ...
Sam7919's user avatar
  • 9,246
10 votes
7 answers
2k views

Choosing parallel side or main road when route mapping

When mapping routes, I often come across sections where there are roads that run parallel to each other with a block or two separating them. Often if one is a main road the other is a secondary road ...
Ponzo's user avatar
  • 151
17 votes
8 answers
4k views

What is the purpose of a tread pattern on city/road tyres?

What is the purpose of tread patterns on city/road tyres? I think I've understood (perhaps wrongly) from this site that they're unnecessary on paved roads: Grip (friction) is more-or-less contant, or ...
ChrisW's user avatar
  • 12.1k
5 votes
4 answers
2k views

Helmet cover starts peeling off: ok or not?

Today I noticed that in the back of my helmet the plastic cover of the EPS is starting to detach/peel off from the underlying layer (see photo) I know that attempting to glue it back is a no no as it ...
L.Dutch's user avatar
  • 7,131
32 votes
5 answers
6k views

Can Cycle Camera Evidence be Used by Police to Enforce Dangerous Motorists?

The (UK) Highway Code dictating that motorists should pass a cyclist no closer than 1.5 meters is only useful to protect us if it can be enforced. Indeed, it's hardly the odd occurrence that I'm close-...
F1Linux's user avatar
  • 2,203
19 votes
10 answers
5k views

Should cyclists on a bike path separated from the road overtake each other on the right or on the left?

I am going to assume right side traffic for this question. Switch all the left and right if you are in the UK. If you are cycling on a road with or without a designated bicycle lane you should stick ...
quarague's user avatar
  • 454
8 votes
1 answer
3k views

Bike helmet expiration

I have a bike helmet, Specialized Align. By the manufacturer's sticker, it was produced in 2013. Most of the time, it has been stored in the garage, only saw a very light use (several hours in a month ...
lukeg's user avatar
  • 183
3 votes
1 answer
231 views

Steering torque

What defines the steering torque? What is an average value for e.g. city bikes and downhill MTB? Is the static torque largest for returning the steering to zero position, depending on (radial) load ...
handle's user avatar
  • 301

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