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.

learn more… | top users | synonyms (2)

2
votes
4answers
104 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 ...
0
votes
2answers
82 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 ...
4
votes
1answer
87 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, ...
3
votes
3answers
158 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 ...
0
votes
0answers
27 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 ...
1
vote
0answers
60 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 ...
0
votes
1answer
72 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
votes
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 ...
1
vote
3answers
157 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 ...
1
vote
4answers
279 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 ...
1
vote
0answers
96 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 ...
2
votes
5answers
99 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 ...
0
votes
1answer
82 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 ...
3
votes
4answers
398 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 ...
6
votes
2answers
450 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 ...
0
votes
1answer
173 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 ...
0
votes
0answers
71 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
vote
2answers
147 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
vote
0answers
95 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
281 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 ...
1
vote
5answers
251 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
vote
3answers
137 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 ...
0
votes
0answers
46 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
votes
3answers
231 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
163 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 ...
2
votes
1answer
204 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
172 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 ...
8
votes
2answers
677 views

Disk brake squealing after bike shop changed my pads. Is it enough reason to ask them to re-service (for free)?

I recently took my bike to the shop, since it started making a weird metal on metal (not squeal, just hard brushing sound). After checking it out the saw that the back brake pads where really (REALLY) ...
0
votes
0answers
96 views

Where can I find a Shimano cs50 stopper fixing bolt?

Somehow I lost a single 'stopper fixing bolt' on my down tube cable stop. I have a set of Shimano sm-cs50 outer down tube cable stops, and I don't want to buy new ones because I only need one bolt. ...
1
vote
2answers
199 views

Can a 120mm fork be mounted on Specialized Myka?

I have this fork available: RST Gila T8 (120mm travel option). The 80mm XCT fork on a 2-year old Specialized Myka is getting worn. I am considering installing the fork. Here it is explained that ...
2
votes
1answer
380 views

What does vulcanizing solution in patch kits consist of? Can I buy it?

I have a pile of old patch kits for inner tubes that are complete except for the little tube of "vulcanizing solution" that comes in patch kits. With time, these tubes crack, or have a cap fail to ...
3
votes
3answers
180 views

Fork shakes on braking

I reanimated an old city bike. The front brakes work fine but the brakes squeaks. So I cleaned the rim and brakes, now the fork shakes on braking. What is wrong and how can I fix this? Change the ...
5
votes
2answers
454 views

Disc brake producing noise after a crash

After little crash I'm hearing strange knife-like sounds from my disk brakes, but the wheel and brakes doesn't look damaged. What should I do?
2
votes
2answers
366 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
3answers
391 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 ...
6
votes
2answers
665 views

How to determine if my rear axle is bent?

When riding, the rear wheel feels as if there is a tiny pebble, stuck within the thread. The wheel is one week old, the hub is Shimano FH-M475. I have done only very tiny jumps - for example from ...
2
votes
3answers
135 views

Why would each patch produce a new leak before resintalling tube?

I got a puncture in my tube (size 700c x 23c, Kendra, came with bike) and applied a vulcanizing glue and patch, then checked it. Before reinstalling the tube, there was now a new leak right next to ...
1
vote
1answer
295 views

Bottom bracket mysteriously squeaking

Somewhere from the non-drive side of the drivetrain is coming loud squeak when I pedal hard. The story is long. First I threaded the BB-ES25 incorrectly, and had to spend half an hour with a file to ...
0
votes
1answer
103 views

How can I fix panniers that have got holes in

I've got some Crosso panniers that have got quite a few holes in. I once fixed a drybag backpack with patches of leather and industrial strength glue which worked like a treat, but I've forgotten what ...
3
votes
2answers
371 views

Way to fix outward dent in rim?

On a ride today I ran over a water run off too fast and have caused an outward bulging dent in both sides of my rim. The bulge is hardly noticeable to see or touch but I "think" I can feel it when ...
3
votes
2answers
582 views

Broken rear axle. Why does it happen and is it worth trying to repair?

So I'm taking the time during the holidays to overhaul my commuter bike. The whole drivetrain was full of old oil, road salt and grime so I decided to take the whole thing apart starting with the back ...
-3
votes
1answer
116 views

Handlebars are slipping and the stem is cutting into my bars. How do I fix this? New bars and stem or just a new stem?

I bought a 2014 kink curb and I think I may need to buy new bars because my stem is cutting into them. I don't know though. If anyone could please help me with this.
4
votes
2answers
105 views

Why would tube patch sometimes peel off with backing?

Sometimes, when patching a tube, the newly placed patch will peel off when removing the backing. Sometimes I have this problem and sometime I don't and I'm not sure what the difference is. Is it the ...
2
votes
1answer
152 views

How to securely connect cable to AXA Quattro dynamo?

See the image: How do I securely attach the cable to the dynamo? I tried the obvious, threaded the cable through one of the holes in the plastic cover, and pressed the cover snugly onto the socket. ...
1
vote
4answers
403 views

New headset cups loose against the frame

Trying to replace the headset cups and race faces on a steel frame for 1" fork. Removed the old cups by gently knocking them in a circle with a steel pipe of the correct diameter. However, the new cup ...
2
votes
4answers
1k views

How can I remove a stuck rear cassette?

I've been trying in vain to remove a rear cassette that I myself installed about a year ago. I may have over-tightened the lock ring and now I can't remove it no matter what position I hold the ...
1
vote
1answer
137 views

Threaded headset wobbles after riding

This is my first time adjusting a threaded headset. After thoroughly cleaning, inspecting and greasing the bearings, I attempted to re-assemble the headset. The piece is interesting in that the lower ...
2
votes
2answers
169 views

Suitable remedy for chain damaged by bike shop

I've got a fairly old Dawes Discovery 301 (not sure of the year); earlier today I took it to a shop to have a replacement bottom bracket fitted. I rode it 2 miles home, and noticed a slight ...
0
votes
1answer
223 views

Maintenance of Fork springs on Marzocchi Bomber Dirt Jumper

I recently took my fork into my mechanic for service because it was making a rattling noise in one of the fork legs. Upon initial assessment he thought it was a broken return spring for the air ...
3
votes
2answers
325 views

How to route cables aroung the head tube?

Consider this illustrative picture: The cables are routed "across" the heatube. Id est the cable leaves the shifter, crosses the headtube and then curves back under the top or bootom tube. I often ...