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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4answers
146 views

How do I stop punctures for good?

Last night I came out of work to a flat tire. This is the second time I've got a puncture with less than 100km done on a brand new set of schwalbe smart sam tires. needless to say I was quite annoyed. ...
4
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4answers
8k views

Shimano Revo Shift Gives No Clicks

I have a problem with my shifter. My bike is using Shimano Revo Shift(gripshift) RS-35 (see my picture). The one shifting the front derailer (the left shifter) does not click when I turn it but it ...
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8answers
4k views

Why does the glue in a puncture repair kit dry up so quickly?

With puncture repair kits, generally you get like 6-8 patches and a tube of glue. The only problem is I can really only use the glue for the first patch because once it opens, it just ends up drying ...
2
votes
2answers
78 views

The best way to deal with/prevent punctures on tubular tyres

I recently picked up some rather expensive tubular wheels on the back of a lot of advice to do with rolling resistance, comfort etc. However I've recently found I'm quite afraid to use them on long ...
21
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10answers
5k views

Do glueless tube patches work as well as glue ones?

Quite a few years ago I tried some glueless patches for repairing my punctured tubes while out on the road, and found that they rarely stayed on for very long. I know that technology has advanced a ...
4
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5answers
254 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 ...
17
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8answers
46k views

How to get a very tight tire back on the rim?

I needed to change the tube as a consequence of a flat tire and I am in the situation that it's just impossible to put the tire back on the rim. In almost ten years of experience with road bikes and ...
4
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1answer
133 views

Reoccurring Bent Axles, any reasons or upgrades?

Earlier this month I had a issue with a broken axle. It was the original that was sold with the bike and lasted around 5,000 miles. I went to my LBS and bought a new axle (unbranded, labeled, etc, ...
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1answer
185 views

What exactly happened to my rear derailleur?

I had installed my front derailleur and was adjusting the high/low when I noticed my rear derailleur was hitting the spokes of my wheel. Suddenly, I saw a screw pop out and then my derailleur popped ...
8
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1answer
6k views

Chain slipping off derailleur jockey (need suggestions ASAP)

Last week, I had to abandon a training ride due to my chain slipping off my rear derailleur jockey. This would only happen when shifting, and most often when either shifting chainrings or shifting ...
2
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4answers
116 views

Are there any permanent solutions for holes smaller than 1cm on outer tyre?

My road bike tire is damaged because of some biketrap I fell into. After a month I got a flat while riding. I found this hole at the damaged area while repairing the puncture on inner tube. After ...
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2answers
112 views

Fixing broken STI shifters - plastic gear cable surround

As pictured, after knocking over the bike I've broken one of the plastic surrounds where the gear cable enters the front derailleur shifter. Shifting between the lower two chainrings still works, but ...
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1answer
777 views

Shimano dual lever Ultegra ST-6600

The shifter cable broke on the way home from work. The break was inside of the dual lever assembly. I was able to fish out the cable end. But, with a new cable, I am not able to get the shifter to ...
8
votes
7answers
11k views

brake lever will not return

My friend has a mountain bike that survived last years Queensland's floods (Australia, that is), but is all battered and bruised after not being ridden for a year. With my beginner's repair skills, I ...
8
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3answers
316 views

There is a lip on my brake pad from bad positioning. Can I remove the lip?

One of my bikes had the brake pads positioned poorly and they developed a pretty pronounced lip where the pad hung off machined braking surface on one side. The bike is using cantilever brakes. These ...
4
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2answers
5k views

How do I stop my brake from sticking?

The rear brake (calliper) on my road bike sticks. When I pull the brake it pulls down but only half springs back and there's then slack in the leavers. This is causing rubbing on the rim. It's a ...
3
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3answers
188 views

Rear index shifting not staying in middle gears

I have replaced a chain (SRAM PC 830) and 7 speed freewheel (Shimano MF-HG37) on the back of my daily commuter bike about 300 miles/ 3 weeks ago with the same models. The old parts lasted me 4000 ...
7
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3answers
1k 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 ...
2
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2answers
610 views

How do I know the model of my Shimano Torney SIS Index Rear Derailleur, I have a Vertical Henox T3 bike?

I had a vertical henox t3 bike which I hadn't ridden in a long time I changed gear and the derailleur bent into the wheel spokes and the derailleur is now bent and doesn't work properly. The ...
2
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1answer
207 views

Selecting a compatible BB: spindle offset

Replaced Shimano Bottom Bracket, now front derailleur won't shift to largest gear How do I measure a bottom bracket? I thought the only thing that mattered when replacing a bottom bracket ...
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0answers
28 views

Shimano Inter7 axle unit disassebly

I am trying to disassemble Shimano Inter7 SG-7C26 unit to clean and repair after a bearing retainer that is situated between parts 1 and 2 broke. I am having problems removing part 2. Does anyone know ...
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0answers
68 views

Lowrider style bent forks techniques

Would a 24 inch bent fork fit on a 20 inch frame? Is there even a 24 inch fork? Would a 26 inch fit? Also if it doesn't fit in could I just add to the 20 inch - would you be able to extend it making ...
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1answer
103 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 ...
11
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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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4answers
295 views

Damaged (scraped) tire - what to do?

First of all, I am either inexperienced or very lucky because I have never had a flat bike tire in my life. Now comes the question. I have a basic "Specialized Sirrus 2013" hybrid bike which has run ...
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3answers
163 views

How to fix V-brakes

Somehow the little black rubber thing that goes with the brake got folded over the silver round clip... I tried various tools (After my fingers etc hadn't proved useful) in trying to drag it back but ...
2
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5answers
102 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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0answers
100 views

Mystery item broken on old Dawes. Help!

I was adjusting rear brakes last night and this little thing snapped in half (see image [right]). The linear indent holds my brake cable in place and a 5mm bolt holds this in place. I guess I need to ...
7
votes
1answer
240 views

Do I need to get a replacement bike for this broken chainring?

I wanted a cheap commuter bike, and just received this bike from Amazon. I have little knowledge about bikes, but looks like the middle chain-ring is broken to me. Is this indeed broken, or is it ...
0
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1answer
103 views

Slow lever return after shortening brake line and bleeding

I've just recently replaced the brakes on my MTB with a pair of Shimano XT hydraulics. The rear brake line was extremely long for my frame's routing, so I had to cut it and subsequently bleed the ...
2
votes
3answers
938 views

Best way to patch road bike tubes

I've scoured the internet for this answer, as I recently just tried to repair a tube on my Purefix fixed-gear bike which I assume uses tires and tubes similar to road bikes, as the tire size is ...
6
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2answers
636 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 ...
3
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4answers
561 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 ...
2
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1answer
177 views

What parameters are important when replacing a rear hub?

My rear hub is damaged. I have not yet inspected the source of the damage, but the wheel is moving sideways when rotating (a LOT), plus I rode it like this for about 35km. Therefore, I find it ...
39
votes
7answers
22k views

Can I ride home with a broken spoke?

I noticed a wobble in my back wheel while commuting in this morning. Broken spoke. Is this a problem that I should take care of before my 7 mile commute home, or can I pick up a spoke and repair it at ...
0
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0answers
72 views

Peculiar feel when pedaling

I ride an early 90s Scott Unitrack CST with the original Shimano Deore drivetrain it came with. Same as this one. When pedaling, the right pedal has a peculiar feel like a sudden inward jerk at a ...
1
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2answers
151 views

Why has my ride changed?

The bike is a Specialized Camber 29, about five months old, from a shop about 220km away. Something feels different in my ride, and I'm wondering what it is. the rear goes sideways in sand much ...
1
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0answers
111 views

Serial numbers on bottom of a pedal crank housing from a 50s era Schwinn?

Can someone please explain what these three numbers mean on the pedal crank housing? I believe this to be the pedal crank housing from a 1956 Spitfire Ladies Bike. The Schwinn Serial reads M0D502 ...
3
votes
3answers
294 views

Replacing a chainring - what did I do wrong?

TL;DR I thought I could figure out repairs myself but clearly I'm a moron. I replaced the chain and chainring on my fixie last Saturday, and this morning it got scary loose on me. I started to feel ...
3
votes
2answers
4k views

Deformed/uneven/bumpy wheel/tire/tube, how to diagnose or repair?

My bike has a deformation in the rear wheel, almost surely not due to the rim. At some point the tire has a "valley", causing it to bump instead of rolling smoothly. I'd like to understand if I have ...
2
votes
2answers
412 views

What does a “dished” wheel mean? How to tighten spokes on such a wheel, without a spoke tension meter?

Should all the rear wheel spokes have equal tension? Or should the spokes from the side of the cassette be tighter, in order to skew to wheel in that direction, and the wheel to be centered in the ...
1
vote
5answers
294 views

Tools and spares needed to repair a chain on the road

I'm increasingly riding long-distance randonees/audaxes and I'm pretty confident I can fix most simple things which might go wrong with the bike. However, I've never done anything with a chain apart ...
1
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3answers
150 views

How do I stop my rear derailleur from rubbing against my chassis?

I have a fairly new Shimano rear derailleur on a cheap department store MTB a friend gave me. Recently the derailleur (particularly the jockey wheels) have started to rub against the chassis in high ...
7
votes
5answers
321 views

Patching waterproof panniers

I've managed to tear a couple holes in my panniers. Nothing enormous; they can still hold their contents, but they definitely need patching. What would be a good way to patch them, keeping them ...
4
votes
1answer
1k views

How to reassemble spring assembly on Shimano M520 SPD pedals

I have a pair of shimano m520 pedals which were damaged in an accident. The springs rotated past the tension bolt and now the back section, usually under tension, now hangs free. How can I ...
0
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0answers
49 views

Planet Bike speedometer won't reset

I have a planet bike speedometer and after the winter season it seems that it is no longer functioning. It will come on when the bike starts to move but I cannot reset it and it seems to be frozen on ...
0
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3answers
237 views

Rebuilding a rear wheel

My rear hub is damaged. I have not yet inspected the source of the damage, but the wheel is moving sideways when rotating (a LOT), plus I rode it like this for about 35km. Therefore, I find it ...
2
votes
1answer
255 views

I broke my rear axle, apparently it's an old style. Is it easily replaceable?

My rear axle broke so I took my bike into a shop to see what they suggested. I had read a few posts that had said it should be fairly easy to replace the axle. The guys in the shop said that because ...
3
votes
2answers
175 views

Do bikes require a specific brake type?

I have a old bike of mine that I want to fix up for my younger brother. I don't know the brand, it just says Shogun racing on it (I haven't used it in ages and it was a gift.) It had the factory ...
1
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3answers
459 views

Cycle tyre and tube burst

I pumped my cycle front tyre to 105 psi (700*23c) 5 days back and cycled some 60 km on the same day without any punctures. Afterwards I parked the cycle in my bedroom for the last 5 days (due to ...