Questions tagged [damage]

Dents, tears, scrapes, scratches to your bike received in falls, crashes, parking failures, roof-rack collisions, etc.

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26
votes
9answers
6k views

How bad is switching derailleur gears under load?

I have heard several times the wisdom that you should not switch derailleur gears while pedalling hard ("under load"). The "right way", according to those people, is to pick up ...
26
votes
1answer
8k views

What is a taco?

I figure that "tacoing" is a typo but I can't work out what it should be. What is a taco, or tacoing a wheel? Originally from this question
19
votes
5answers
9k views

How does a bike 'degrade' whilst unused

What (if anything) will happen to a bike whilst it sits unused, that wouldn't happen to it whilst being used for a work commute over the same period? Suppose I take a 3 month sabbatical and leave my ...
18
votes
6answers
6k views

How is this damaged aluminium frame likely to fail?

I had an unplanned collision with a car yesterday (everyone is fine, thankfully) but my bike – a Giant Revolt 1 – now has a lovely new pair of dents. I cycled it home from the collision (~6km) and it ...
18
votes
6answers
7k views

Does riding high gear up a hill damage a recumbent bike?

I have a recumbent trike with 26 gears. While normally I would shift to a low gear when going up a hill, I found that I can go up hills in the highest gear, the configuration that gives me the fastest ...
15
votes
4answers
13k views

What options do I have if my rear derailleur breaks when I'm out on a trail?

I ran into an unfortunate situation earlier this week. I was out on a mountain bike trail, alone — just me and my hardtail. I'm pedaling, when I suddenly hear a CRUNCH and my bike stops. The hanger ...
13
votes
4answers
5k views

Front disc brake wobbling / grinding on pads after full braking and minor plunge

The front disc brake grinds after a light accident with full braking and plunge. To give an idea of the forces involved: The bike fell to the left, mostly cushioned by me. The bike had no more ...
12
votes
4answers
3k views

Big dent on frame: How did this damage happen?

I just bought this second hand Ridgeback Impulse folding bike for my partner. I'm a wheelchair user and it was dark and rainy when I collected the bike. So... I didn't check it (facepalm) I just got ...
12
votes
1answer
1k views

What do I do when I am unsure if a carbon fiber component is safe to use or needs replacing or repairing?

Intended as a canonical answer to the many questions we have about damage to carbon parts. It is well known that carbon fiber parts can be damaged and fail, and carbon parts can be fragile when ...
11
votes
6answers
4k views

Warranty on lock damaged during attempted theft

Someone attempted to steal my girlfriend's bike tonight and they damaged the lock. Do you guys know if we can use the warranty to get it exchanged? The lock has a 2 year warranty and I'm planning to ...
11
votes
4answers
24k views

How can I tell a bike is safe after a crash?

I was recently in an accident where a car pulled out on me. I hit the car around the front wheel and me and the bike went over the bonnet and landed on the road, the other side of the car. I was ...
11
votes
4answers
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://...
10
votes
5answers
2k views

Which parts of a wrecked bike would be OK to use or sell?

A few months ago I was in an accident with a car on my way home from work (oncoming car turned left in front of me). My bike was severely damaged, the frame broke in two and the front wheel is bent ...
10
votes
2answers
754 views

Method for shortening a damaged hydraulic brake hose?

I had an incident recently that resulted in a damaged hydraulic hose. It was munched by the chain. Curiously, the brake still holds pressure and functions, though I have limited confidence in it. I'...
9
votes
7answers
7k views

Can this crack in the steel chain-side dropout be welded?

I have a thru-crack on the driveside dropout near where it meets the chain stay. The bike is an early 1980's steel frame Trek mountain bike. See pics. Bike rides fine otherwise and I have invested ...
9
votes
2answers
2k views

Frame with bottle cage boss ripped out - how serious is the damage?

I'm a huge fan of Greg Lemond so naturally when this frame showed up in my local Facebook page with just the frame and headset, no fork. I got very excited. The seller says that the bottle cage boss ...
9
votes
6answers
6k views

Can chain-slap cause damage to a chainstay that is beyond superficial?

Yesterday a coworker insisted electrical tape on his chainstay was necessary, as "[he] gets so much chain slap [he's] literally snapped frames". Now there's a couple dubious aspects to this--but my ...
9
votes
1answer
261 views

Is this aluminium rim saveable?

I have an 8 inch rear wheel off an adult scooter. It appears to have suffered crush damage - at a guess someone's driven a car over the wheel while on its side. The bend is smooth and covers perhaps ...
9
votes
1answer
2k views

What does it take to damage an internally geared hub?

What behavior can easily damage an internally geared hub (Shimano Nexus or Alfine for example)? can one jump off high (say 50cm) curbs? can it be damaged by shifting gears under too much torque? ...
8
votes
7answers
4k views

Why is a damaged bike tyre a problem?

I have seen / heard of cases where bike tyres get damaged (like for example riding on a flat). But what I don't fully understand is why the damage becomes a problem or whether the tyre actually needs ...
8
votes
5answers
5k views

Rear Tyre torn at rim - what was the cause?

I had a blowout the other day. On investigation, it was a C-shaped cut in the tube. It patched okay and on reinstalling I found this culprit : The tyre is not new but its not old either - plenty of ...
8
votes
3answers
4k views

Why are 36-spoke wheels a touring thing?

I've been looking at tourers recently and they tend to have 36 spoke wheels (as does my hybrid on the back after I broke my original rim). What I don't understand is why high spoke counts aren't used ...
8
votes
3answers
12k views

How can I determine whether rust has made my bike unsafe?

I ride a 1972 steel frame bike year round through Canadian winters. When I got the bike it was in good shape, but after putting a few thousand km worth of commuting on it, it has a lot of scratches ...
7
votes
6answers
1k views

Tips for dexterously handling bike lights with winter gloves

I've got some battery-powered LED lights which are mounted using the typical "click-in" bike mounts somewhat like the one pictured below: Unfortunately, I've got the fine motor skill of an elephant. ...
7
votes
3answers
3k views

Why doesn't my (battery-powered) light work in the cold?

I've got a cheap LED lamp running on three AAA NiMH batteries which stops working when exposed to near-freezing temperatures; is there a likely reason for this? The lamp has been dropped a number of ...
7
votes
3answers
2k views

Broken rear brake - told it was unfixable

I have an older model Trek mountain bike. I took it to the shop for an annual tuneup and they called me to say that the rear brake broke off the frame and that it can't be fixed. The entire brake is ...
7
votes
5answers
1k views

Cracked rim around the spoke

I purchased a pair of Carrera Vendetta wheels, 27.5" with 2.8" tyres. I found a couple cracks where the spoke sits around the back rim. Is it okay to ride or is it okay to weld them?
7
votes
2answers
1k views

Cycled through pothole on carbon frame - damaged?

Yesterday while out on my daily exercise (I live in London) I had to cycle through a pothole (bus too close behind so couldn't swerve or stop) that jolted the whole bike. I then noticed a rattling ...
7
votes
3answers
771 views

What can I do to fix or replace this broken axle?

I cased a jump badly and I broke either my bottom bracket or crank, I’m not sure which. What can I do to fix or replace this? Picture is of my broken bottom bracket or crankset.
7
votes
1answer
11k views

Fixing damage to brake rim surface

somehow the alloy braking surface of my rear wheel's rim has got a series of quite shallow lacerations, less than a mil' deep bunched quite closely together (the effected area is no more than 1/8 of ...
6
votes
4answers
736 views

Should I replace the tyre or can I keep going?

I just noticed a small tear in my Continental GP 4000s. It does not bulge out from the side. The tyre have been on for some years now but dont have more than 1000km on them. I am worried though if I ...
6
votes
2answers
1k views

Shredded bits of material under my trainer

I'm starting to get a pile of what looks like tire rubber under my trainer. Could it be something else like dry chain lube coming off? Is this normal? Have I set up my trainer incorrectly? Do I just ...
6
votes
4answers
2k views

Cause of broken spokes (pictures included)

I never had this problem before. Two spokes on the drive side of my road bike's rear wheel broke at the J bend, and I'm trying to identify the cause. The wheel has 32 spokes total, made of steel, ...
6
votes
3answers
3k views

How bad is this broken brake cable strand?

I just bought a new bicycle. While I was fiddling with things (removing tags, mounting a light, etc.) I noticed that the boot on the rear brake cable was loose. When trying to reseat it, I found that ...
6
votes
3answers
804 views

Worried I damaged my fork fitting crown race

I'm an idiot. I've been working on building up a Surly LHT frame and was all going fine until I got to fitting the crown race. I couldn't get it to fit properly and instead of making a cup of tea and ...
6
votes
2answers
304 views

Is this rim safe?

The rim has a parting at the join: This is a brand new wheel, and I was wondering if this is a safe one. Could it split at the join?
5
votes
2answers
773 views

E-Bikes - Is it bad for the bike to run out of battery?

Today, I ran my e-bike out of battery for the first time. Interestingly enough, the bike didn't actually turn off, but automatically moved the mode from "Eco" (light pedal assist) to "Off" (no pedal ...
5
votes
2answers
2k views

How can I repair carbon damage near my bottom bracket?

I have had a few gnarly chain-drops that ate at my Open U.P. carbon frame. I thought I just had some chips in the carbon, but today I removed my crank for a full bike clean and realized that the ...
5
votes
1answer
350 views

Can I use fiberfix tape to reinforce this shoddy weld?

I recently built a hi-ten steel bike and I just realized that it had a large hole in one of the welds near the seat tube and the top tube. Tried taking it back to the shop that shipped me the frame ...
5
votes
2answers
3k views

Rode on a flat tire - how do I check for possible damage?

Took quite a fall today while riding, big divot in a gravel path right over the peak of a small hill. After replacing the chain and doing a quick inspection, I resumed the 10 mile trip to the car. I ...
5
votes
1answer
3k views

Can i stop my frame scratching my seatpost?

I have an On-One Scandal aluminium frame, into which i have put a carbon seatpost. I have been adjusting it to find the right height, and i have noticed that it is getting seriously scratched - see a ...
5
votes
3answers
736 views

Protecting Tires from House Cats [closed]

I have a friend with several cats, one of which destroyed the material of their bike tires and is presumed to enjoy doing so.. having acquired new tires and tubes (but not yet put them on), how can we ...
5
votes
1answer
2k views

Will I damage anything by not replacing my clicking bottom bracket?

I have a Specialized 2010 Sirrus Sport with a sealed cartridge square taper bottom bracket that makes a clicking noise. If I don't have it replaced, will I be harming anything apart from the bottom ...
5
votes
1answer
964 views

Dent in titanium MTB frame, is the frame OK to ride?

I have a early 90s Basso Ti Hardtail MTB bike (made by Litespeed I believe) which I bought from my room-mate back in the day. I've kept it going with regular maintenance and occasionally replacing ...
5
votes
2answers
808 views

Carbon cranks care?

I have carbon cranks (SRAM S-2200) on a new bike. The side is quite protected but the bottom part, where the pedals are fitted, is not. Hitting rocks on the bumpy road is sometimes inevitable. How ...
5
votes
1answer
832 views

To what extent am I responsible for stones flicked by my tires?

Every now and then when I ride over a peanut sized stone the tires squeeze and accelerate it to the side at up to 30m/s. So far I have only hit a building and a car which ended up with a scratch. Am I ...
4
votes
6answers
1k views

I stripped one of four bolts on the faceplate of my stem. Is the stem usable until the replacement arrives?

The aluminium stem on my road bike says the max torque for each of the four faceplate bolts is 6nm. So I set my calibrated torque wrench to 6nm... and one of the bolts stripped its thread. I guess “...
4
votes
3answers
1k views

Have I damaged my tyres?

I noticed after mounting some new tyres that part of the side wall, just above the bead, seems to have been damaged while I was fitting them (see photos below). These tyres were especially difficult ...
4
votes
2answers
860 views

Seat tube dents from Front Derailleur band-on. Is this gonna get worse over time?

I just noticed it on the seat tube yesterday. Looks like a front derailleur clamp mark though I'm running a 1x setup (my LBS might've tried something on it before I purchased). Just worried about the ...
4
votes
3answers
290 views

Is this cone nut in proper condition?

This is the original cone nut of a new coaster brake hub I bought recently. I didn't install it yet, it's new. What bothers me are those weird stains / corrosion signs on the bearing surface. It ...