Repairing your bike when something is broken. REPAIR is not the same as MAINTENANCE, a separate tag. Repair is what one does only when something is broken. Maintenance is what one does on a regular basis.

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Dahon Vitesse frame latch

I am repairing a Dahon Vitesse. The frame latch was incomplete. I have the new frame latch parts but cannot work out where they go, particularly the washers and small springs. Does anyone have a ...
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4answers
5k views

“Quick Fix” Tyre Repair Spray Cans

I saw this in my local supermarket, as they are having a cycling event on at the moment. I was thinking this would be quite useful if I had a puncture away from home, the car or bike repair shop, or ...
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3answers
3k views

Is my derailleur hanger too bent?

I bent the (steel) derailleur hanger on my 9spd cassetted (steel) Bianchi Volpe about 1.5 yrs ago, and I just did it again, but worse. This time the derailleur got sucked into the wheel and really did ...
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6answers
26k views

Removing a stuck pedal

I'm sure this question must have already been answered somewhere here, but it doesn't show up in any search results I make... I'm changing the pedals on a 40 year old bike. Pretty sure the pedals are ...
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3answers
3k views

Best practice for patching snakebite pinch flats on skinny tubes

So, I tend to run 700x23c or 700x25c tires on my commuter bike. Sometimes I'm lazy and forget to check the air pressure and inevitably get a pinch flat when I hit some stationary object, pothole, or ...
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5answers
125 views

How can I tell if I have properly patched a tube? (specifically a 2" mt. bike tube)

I normally swap out a the tube on the trail if I get a flat and then patch at home. So that leaves me with a patched tube ready to put in a tire and I'd like to test it without having to swap out a ...
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5answers
2k views

What are the downsides of a twisted wheel?

After a collision where somebody fell on me, my front wheel is twisted to the point that it slightly touches the brake once per revolution causing a soft screech. Logistically, I can't get to the shop ...
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5answers
2k views

If a derailleur cable snaps on a long ride, how can I keep going?

A couple weeks ago I rode around Crater Lake, a 35 mile ride with over 4500 feet of cumulative elevation gain – the sort of ride you really want functional gears for. The night before my rear ...
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2answers
197 views

Catastrophic failure

My rear wheel suddenly became loose in traffic today. It is completely off axis. The axle looks fine from the outside. I remember being told something about loose cones. Should I bother to repair ...
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1answer
53 views

Vibrations in one of the pedals [closed]

I feel vibrations in one of the pedals when I put my weight on it. It feels like the ball bearing is broken or something. Is that possible? How difficult is it to fix the ball bearings on the pedals ...
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2answers
126 views

Should I change the tire and tube or can it be patched?

Someone deliberately pierced the rear tire of my fixed gear bike. It's a 700cX25 tire with 700cX18-23 tube inside. As you can see from the image the threads have come out. I am not sure about the ...
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3answers
127 views

Town bike intermittently harder to pedal

I have a Dutch town bike with backpedal brakes (omafiets). I live in Amsterdam where it's flat and have checked the tires are fully inflated. Originally the bike was very easy to pedal and often it ...
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1answer
1k views

Changing one of the chainrings on SR Suntour NEX crank?

I have a SR Suntour NEX (42x34x24) crankset and got my system really bad recently. But as I've used the second (34) chainring most of all I would like to replace only this one. Is it okay? Does my ...
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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 ...
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2answers
67 views

Change gear on a shimano Schwinn Ranger, not sure what Allen key size to use?

I've tried an Allen key 7/64 but that didn't work and the others on my Allen key set but none seem to fit this shimano on a Schwinn Ranger. One of the derailleur cogs broke in half. Here is an image ...
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3answers
265 views

Should I oil new cable housings?

When installing new cables and housing, is is wise to oil the housing? If so, how? Here Hicks recommends spraying (but for re-newing old cables). On the other hand, I have found it intuitive to put ...
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1answer
84 views

Why are my quill pedal cages “wobbling”?

The plates and connectors on my old quill pedals "move around" in relation to the pedal axle itself: In the photo below, I'm pushing the pedals to opposite sides to show how the pedal cage "distorts". ...
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1answer
52 views

Loose pivot bushing inside the brake/shifter hood

I noticed a slight clicking noise and a resistance when squeezing the right (from the bicyclist's point of view) brake. Inside the hood, I can see a white rubber thingy (pivot bushing, thanks mikes) ...
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2answers
195 views

Headset can't tighten enough without stiffening steering, damaged bearing retainers?

I've just cleaned and regreased my headset (which is the stock Cane Creek headset on my bike). In doing it I've noticed that the bearing retainers are out of shape; they are not perfectly circular or ...
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3answers
196 views

What's the strongest way to bond a cable stop to an aluminum frame?

I recently picked up another well loved GT road bike frame- it's in great shape aside from a missing downtube cable stop. The model is a ZR 4000 probably from 1999, it's 7005 heat treated aluminum. My ...
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3answers
24k views

When do bearings need to be replaced?

How do I know when bearings need to be replaced? Should I go by time? Or is there a symptom to guide me?
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3answers
90 views

Stripped threads on left crank on the first ride

I just purchased a new road bike and had a friend assist me in the assembly. There must have been a problem because it fell off after only 2 miles of riding for the very first time. I used a pedal ...
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1answer
128 views

Replacing Crankset

My dad bought a 2004 Fuji Absolute hybrid used and I rode it to a DIY shop to get everything checked out. On the way, the the chain came off once (1.5mi). Turns out the right crank arm is a little ...
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2answers
147 views

What to do about a broken rear derailleur inner cage plate?

The chain on my road bike got caught in the rear cassette and as it snapped it broke one of the guide tabs on the inner cage plate of my new Shimano Ultegra 6800-SS rear derailleur. My two questions ...
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4answers
434 views

Should an amateur attempt truing a wheel

I was in a bicycle crash recently, and noticed afterwards that the wheel was out of true (it hits the brakes once every revolution). The damage doesn't seem extreme to me though: it's not visible just ...
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1answer
26 views

On a bmx headset could an integrated bearing set be replaced with a caged bearing set?

I have a 20" eastern with a 1 1/8" integrated headset. The problem being is that my headset's top sealed bearing is no good and I only have some caged bearings currently on hand. Is there any possible ...
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1answer
138 views

Shimano Nexus 3 (SG-3C41) 2 and 3 gear problem - Ring Gear Unit Repair

I have this internal gear hub and i try to fix it. 1st gear is ok. On 2nd and 3rd gear, especially when I run faster, the hub is not engaging properly, missing engagement sometimes. It is not problem ...
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1answer
39 views

Repair fork or get new one?

Right now, I have a pretty old and terrible fork: 2006 Manitou Axel Elite 100. It's leaking oil like crazy, and I've almost eaten it a few times because of how easy it is to bottom out the forks. I ...
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1answer
48 views

How do I keep smallest gear on my crank shaft from contacting frame

I have an old Trek 8000 ZX that I am fixing up. I had to replace the bottom bracket and I believe I successfully did that. The bike did not have a crank set to work with so I salvaged one from a pile ...
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2answers
70 views

How to unscrew freewheel sprockets with 9 broken spokes

A friend of mine has this problem. I haven't seen the wheel, but I suppose that the broken spokes are in one "area". It's a 27 inch wheel. Is there any tool that can hold hub tight enough to use a ...
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0answers
90 views

Clear coat on top of old paint in order to preserve it/frame?

Using nail polish to touch-up scratched/rusted frames is more or less well-known (cf. Girls Biking to Work), but recently a hobbyist restorer of old bikes told me that you can "just apply clear coat ...
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1answer
121 views

Can this bike be saved from the rust?

So, I'm buying a bike to use during a summer before I go back home. I found this bike that I'm interested in buying however it's extremely rusty. I'd like opinions on whether this is a DIY clean up, ...
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0answers
27 views

Servicing RS XC30: oil overfill

This is the first RS fork I am opening. It is a steel spring XC30 from around 2013. I followed the manual and am currently at page 15 point 11. On a side note, my damper circuit is TurnKey, but look ...
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2answers
161 views

How to remove pedal bolt with round, smooth head

I'm trying to take the reflector off of some old French track pedals but can't remove one of the bolts holding the reflector on because the bolt holding the reflector onto the pedal rotates with its ...
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1answer
72 views

Identifying Rear Axle Size

I've got a bent QR rear axle and am looking for a replacement. Seems that these come in 9.5 and 10 mm sizes with a couple of different threadings. When I measure the OD of the threads I get around 9.8 ...
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2answers
196 views

Damaged Forks on Giant Tough Road 2

I have recently crashed my Tough Road 2 and slightly damaged the forks at the point where the pannier rack is attached. The retaining bolt is slightly lifted and I am concerned that the forks are ...
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3answers
1k views

Electra Shifter (Revoshift) is hard to turn

My wife has a hard time turning the Revoshift grip on her Electra Townie 7D due to arthritis issues in her hands. Is there a way to help with this issue?
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2answers
184 views

My back wheel will no longer spin freely

im new to this site and don't know anything about how to repair bikes. My Problem is I put my bike into my shed (the shed is cold and damp) and never used it for 3 weeks, it was ok when I put it in ...
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7answers
49k views

When should you replace tires after getting a flat?

A nail punctured my rear wheel tire today while riding. My question is, how do you know if you need to replace a tire or simply repair it with a tube repair kit? The hole looks pretty nasty. The cap ...
3
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2answers
6k views

Can I use a shock pump to inflate a tube?

I know that shock pumps are meant for high pressure applications so that they can withstand high pressures needed by suspension shocks. However, can I use a shock pump to inflate my tire in a pinch ...
3
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1answer
77 views

Replaced left crank arm but still comes loose?

A few weeks ago I bought a new (albeit cheap) self assembly bike from a local store, this bike to be exact http://tinyurl.com/gw77p9t . After about two weeks use (one and a half hours of cycling on ...
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3answers
556 views

Repair service specifically for bike commuters?

I'm not sure if this question is suitable for this site, Startups SE or neither, but here it goes: Is there already any sort of business model catering to bike commuters for expedited repair issues? ...
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2answers
54 views

Identify missing fender part

Let's play "identify the missing part"! While riding, something which holds the fender to the frame between the chainstays and just behind the bottom bracket fell off: Please help me make my bike ...
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4answers
254 views

Minimalist setup for a “travelling bike mechanic”?

I have very little living/working space of my own and so, in order to keep my personal bike in working order, I need to be able to transport "bike mechanic stuff" (e.g. tools, screws, cables, inner ...
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2answers
138 views

Bicycle crank is wobbly

My bicycle's crank is sorta wobbly - it tilts left or right, according to pressure applied to pedals. How do I fix it? What tools do I need? Video showing the wobble.
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3answers
10k views

How many years an aluminium frame lasts in a touring bike?

How long does an aluminium frame lasts in a touring bike? [Removed extra questions to be clear.] Background So far I preferred aluminium vs. steel for many reasons, but if steel lasts ...
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14answers
7k views

Alternatives to buying a repair stand?

I'd like to buy a repair stand, but I can never seem to convince myself to drop the $100 minimum it seems I'd need to spend. Has anybody had any success building a stand themselves, or is it worth it ...
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1answer
191 views

How many spokes can break before I need a new wheel?

3 of the spokes on my wheel are broken. How can I tell if the wheel is still good to use? Can I just replace the spokes or do I need to buy a brand new wheel?
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3answers
291 views

My rear wheel isn't properly spinning. How can I tell whats wrong?

I'm just getting back into cycling after a long hiatus. My bike is a little old and worn and its got some issues. The biggest one is the rear wheel. My rear wheel spins, but it seems to be off center....
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2answers
88 views

Diagnose grinding sound from single rear cog

I've got a '70s-era ten-speed road bike with (what I think is) a Huret Eco rear derailleur which shifts well, but for some reason a loud grinding sound emits from the rear of the bike when using the ...