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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2answers
125 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 ...
10
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2answers
1k 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 ...
4
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3answers
125 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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2answers
65 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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1answer
50 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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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 ...
3
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2answers
137 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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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 ...
3
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1answer
25 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
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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4answers
433 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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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 ...
3
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0answers
84 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 ...
3
votes
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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1answer
83 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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2answers
151 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 ...
3
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2answers
188 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 ...
3
votes
2answers
182 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 ...
6
votes
1answer
133 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 ...
3
votes
1answer
75 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
554 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
53 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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votes
2answers
137 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
187 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 ...
8
votes
4answers
252 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 ...
5
votes
1answer
126 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 ...
5
votes
1answer
189 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?
3
votes
3answers
289 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....
3
votes
3answers
173 views

What are my options for correcting a bent aluminum fork?

I have a Cannondale ST700. A few weeks ago, I had a head-on collision. At first glance, the bike was fine. But the next time I went to ride it, it pulled to the side when I turned. Turns out my fork ...
4
votes
1answer
285 views

Vintage 1979 Peugeot roadbike rear derailleur change

Hello guys, The rear derailleur (6 speed) on my bike (picture attached) shattered all of a sudden while biking uphill after a few months of problems with the chain not fitting immediately on the ...
4
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2answers
87 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 ...
2
votes
2answers
78 views

Wobbly wheel/hub even when I tightened the cones

The wheel has a sideways wobble eminating from the hub. I tried adjusting the cones to the point its too tight but the wobble continues. Upon closer inspection there is play in the point where the ...
4
votes
1answer
119 views

How to re-shape a bent steel fender

I've got an old road bike with polished steel fenders, the rear one of which unfortunately got bent during transport: As you can see in the lower half of the photo, the two sides of the fender were ...
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1answer
50 views

MTB gear xx1 repairable?

I have an XX1 cassette, and broke the cog with 24 teeth, is this replaceable or repairable?
2
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2answers
186 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 ...
1
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2answers
74 views

Feasability of repairing '70s-era welded-steel luggage rack

I've got a '70s Motoconfort (Motobecane) with the original "French randonneur-style" front luggage rack (it looks like a very small porteur rack): In the photo above, the rack is mounted to the ...
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1answer
73 views

Bottom bracket feels rough, should I replace it

My bottom bracket feels rough when I turn it with my fingers. I don't notice any problems when it's all assembled, but it's definitely not smooth like the other parts of much bike like my pedal axles. ...
1
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1answer
66 views

When I shift to the smallest cog, it's suddenly too loose

The other day I was riding with the chain on the smallest cog in the back (and the middle chainring in the front) and suddenly something felt like it slipped and the chain was suddenly way too loose. ...
4
votes
1answer
56 views

Correct setup of Huret rear derailleur

I've got (what I think is) a Huret Eco rear derailleur which seems to somehow get "stuck" in an "open" position when shifting on the front chainrings, i.e. the return spring somehow stops "working" ...
5
votes
6answers
349 views

What to do with my old bike?

I have an old, cheap, second hand bike which I use for commuting. I have to leave it on the street for 10 hours every day, it is old with damaged stickers and dirty which makes it less likely to be ...
2
votes
1answer
112 views

Can 'Zefal All in 1' really doall of those: cleaning, degreasing and oiling?

Can someone tell me if 'Zefal' All in 1 Spray is good for: degreasing, oiling and cleaning? Link It seems suspicious because it covers 4 very distinct functions in a single spray; eg: Degreasing, ...
6
votes
1answer
97 views

How to assemble '70s-era center-pull brake

I've (supposedly) got a 1976 Motobecane Le Champion with what appears to be the original center-pull rim brakes, which unforunately are not in one piece and need to be re-assembled: As you can see ...
4
votes
4answers
131 views

How to fix folding lock holder

I've got an ABUS Bordo Lite folding lock and the holder it came with which attaches to the bicycle's frame using two thin metal strips and/or two Velcro straps is now broken: As you can see, the ...
4
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2answers
255 views

How can I fix the hook of a weather proof pannier?

I have a pair of Mainstream panniers (msx sl 55) but the rivet that holds the hook on the bag fell off. You can see it on images outside and inside How can I fix it while maintaining it weather ...
4
votes
1answer
106 views

What am I looking at in my rear hub?

I had a broken axle, and on the side where it broke (I think) these are the bearings that looking at. As you can see, there is a track of bearings, and then on the other side, two more bearings ...
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1answer
80 views

Can I convert freewheel hub to use cassette?

I'm converting a 1989 Trek 830/Antelope MTB to a commuter and it has a freewheel. Can I convert it to a cassette with the same hub?
2
votes
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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0answers
71 views

Rear Hub Axle Appears Bent – Causes and Repair Strategy

I had my rear wheel off of the bike noticed that as I spin the axle it appears to be bent – the freewheel end of axle, for lack of a better way to describe it, orbits the centerline of the axle. ...