Questions tagged [repair]

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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2
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2answers
273 views

Trying to repair avon roadster 2000 circa

Looking for a Manual or pictures to help put back together an Avon roadster circa 2000.
11
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2answers
2k views

How urgently do I need to replace my tire?

When I came home today from by bike ride I found my tire like this: I understand that I'll need to change my tire. My question is how urgent is this? Can I just keep using the tire until it stops ...
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2answers
563 views

Broken 105 shifter

Yesterday I went for a ride and unfortunately, as it was kind of wet, my wheel slipped while braking into one corner and I crashed. Speed of the crash was around 20 kmph (12 mph) (nothing crazy, most ...
5
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2answers
840 views

Why does my front brake cable push out of my brake lever?

Why is my front brake cable getting pushed out of my brake lever? Is a component of the lever itself broken? Crashed into a pole the other day, busted the front brake. Brand new to both riding and ...
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0answers
49 views

How to fix bearing cup for fixings loose wobbly wheel hub of old bicycle?

I have watched videos for Bicycle Freewheel Disassembly/Assembly, and disassembled my damaged bicycle. The back wheel of it started to Cranking, and by opening its part based of this video instruction:...
5
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1answer
565 views

Bike seat tube is messed up

I was testing my seat and as I was sitting on the bike on the highest level of the seat post. My seat post came off and bent my seat post, so I ordered another, but now my seat tube doesn't allow my ...
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1answer
42 views

How do I fix a left crank that has come off of my Pro Form 4.0 RT Stationary Bike? [duplicate]

The left crank has come off of my Pro Form 4.0 RT Stationary Bike. It is about 8-10 years old although up until this year, I would estimate I put only 200-300 km in total on it. This year I have put ...
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0answers
41 views

Fixing up a rusty old Rallye mountain bike

I bought a Rallye mountain bike from Facebook Marketplace last year and did most of the major overhauling then as well. It was covered in mud, gunk, rust, had broken pedals, etc. So I had replaced the ...
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2answers
123 views

Sticking points in the pedal stroke

During a stroke, I encounter one or two (not always in the same pedal position) where the resistance is high. If I spin the crank freely (on the bike, wheel off ground), it will quickly come to a stop ...
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0answers
56 views

Fluid trainer, repair leak?

I have a Travel Trac (Performance Bicycle) Century V fluid trainer, vintage c. 2005, that I've pressed into heavy-duty service during the pandemic. It's been working well these past months, but seems ...
5
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3answers
1k views

Did I pay too much for repairs?

So I left my road-bike (Specialized S-works) into a local bike shop (that deals in Specialized) to have its service, the only problem it was giving me was a little chain rub because of the front ...
5
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2answers
135 views

Can I remove my thru axle when the lever is disengaged?

I was changing a tube on my Breezer Doppler pro today, and when I went to reinstall the thru axle, everything threaded together smoothly but then the cam lever became disengaged from the axle. Now the ...
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1answer
79 views

Method to remove and prevent rust on a Reynolds 531C bike frame?

The frame of the 531C Reynolds tubing is rusting, What is the most appropriate method to remove and prevent the rust? Would it be removing the rust and repainting? If so could you like me to resources ...
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1answer
73 views

Rear derailleur adjustment

I have a 7 speed Shimano derailleur. It shifts really good from 1 to 6 but when I try to shift from 6 to 7 it just doesn't want to shift. Can someone help me?
1
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1answer
59 views

Shimano M355 part broken

Was riding my bike over a jump when i lost control and bailed. This led to a tiny part on top of the brake lever to snap and come off. Cant find any details on the part and its not on any diagrams or ...
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10answers
3k views

How to transport an unusable bike AND a set of wheels without a car?

So as you may know, I have recently assembled a bike, with great help from my friend. Problem is, wheels didn't arrive on time, rear rack wasn't available to buy until recently, and saddle post clamp ...
5
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2answers
147 views

Seat post bolt sheared off - twice

I use a BMC TM02 on CycleOps Magnus. The seat bolt has sheared off twice while riding on the trainer. The seat is attached to the post by a single stainless steel bolt. KSFC 12.9 appears on the head ...
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1answer
45 views

Replacing limit screw on R8050 Di2 front derailleur

I recently bought a second hand R8050 Di2 front derailleur as part of my slow migration to going Di2. However, having got all the bits together and started building up I noticed that the H-limit screw ...
8
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1answer
122 views

Freewheel engaging sporadically when turned backwards at low speed

I noticed that when going at low speed without pedalling the freewheel sometimes seems to engage anyway and pulling the chain until there is enough tension ( as the rear derailleur contracts due to ...
3
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1answer
86 views

Too much movement in the stem

Basically what is going on with my bike is that I tried to fix a creaking problem in the area where the stem and the bike frame meet. I took apart the front of the bike and some of the headset pieces ...
3
votes
1answer
122 views

I just banged up my bike, what damage should I look for?

I'm sort of looking for a "generalized checklist" of damage types to look for on a bike that I recently slammed and dragged against a lot of things and now runs a little slower than before. ...
1
vote
1answer
106 views

Front wheel is not aligned and touching the brake line

On my bike the front wheel is not centered below the handlebars, instead it seems to be more on the left side. Weirdly that's also the side where the disk brake is located and the wheel is touching ...
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0answers
41 views

Ribble CGR Ti - Replacement Gear Hanger

The gear hanger on my bike broke about 3 weeks ago. This is a sacrificial part, but Ribble are out of stock and seem to have no idea when this critical part will be in stock again. I have looked on ...
3
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2answers
48 views

Rockshox Pike Scratch

I have a rockshox pike with scratches on the fork stanchion. I would like to know if there was anything I can do without buying a new one. Any suggestions would be greatly appreciated! Here is a ...
1
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1answer
245 views

SRAM BB30 cranks - how to remove crankarm from spindle?

I have SRAM S2200 (X.0) cranks with a BB30/PF30 spindle. They are 3-piece ones, with the self-extracting mechanism on the right (drive) side, and a regular non-puller bolt on the left side. I want to ...
5
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1answer
75 views

Hollowtech II BB alternative for stripped frame threads [duplicate]

I removed the BB (Shimano BB-93) from my Canondale Trail and found the drive side thread is stripped on BB and frame. See and What are the options for me to replace the BB? Is there an alternative ...
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0answers
22 views

Options to fix a stripped driveside BB thread- Shimano BB-93 [duplicate]

I removed the BB (Shimano BB-93) from my Canondale Trail and found the drive side thread is stripped on BB and frame. See and What are the options for me to replace the BB? Is there an alternative ...
1
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2answers
113 views

Campagnolo Super Record H Screw

I am having trouble adjusting the shifting on my Campagnolo Super Record rear derailleur. I have set the high and low limit. I think the main problem now is that the jockey wheels are too far away ...
5
votes
2answers
302 views

Quick link won't 'click'

I'm brand new to bicycle maintenance/repair and just replaced my chain for the first time which I'm very excited about. I do, however, have a problem. I used a quick link to attach the chain and I ...
0
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1answer
188 views

Direct mount vs. hanger derailleur

Currently repairing a bike that I got off the road for free years ago. Around three years ago, a stuck link caused a chain jam while pedaling at high speed, causing the metal around the b-knuckle on ...
5
votes
3answers
200 views

Should my pedal be this shape or is it bent?

I took my pedals off my old bike to grease them and I noticed that they were both splayed outwards on the outside edge. This means that either they sit on the top of the axle cup (if that is the name)...
2
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0answers
149 views

Bosch eBike wiring diagram, where to find?

My RieseMüllerPackster80 refused to start today. I guess there is a bad connection somewhere but as all I could do was plugging the battery and computer in and out, I am not wiser whether cabling has ...
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5answers
150 views

Professional bike mechanics & maintenance training courses

Recently I have been doing some small fixes in own bikes, I have enjoyed it a lot, then comes to my mind the idea that would be nice to help others as well, but in a more professional way. What is the ...
4
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2answers
210 views

Movement in head tube/fork?

I have a BH road bike and it has some movement with the tube that connects to the fork. I took it to a bike shop for a tuneup. When I picked it up the guy mentioned the issue. He said he tightened ...
1
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0answers
77 views

Rear wheel keeps ending up squint, axel on cassette side lateral movement?

I have an old(?) 2010 Carrera Vulcan MTB and the rear derailleur hanger broke a few months ago (my son accidentally bashed it with his bike). Even though the bike is old, it has not really seen much ...
1
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1answer
81 views

Bottom bracket compatibility

After two LBS's, a blowtorch and a tyre shops impact driver I finally have my bottom bracket out. It an aluminium frame if that makes a difference. On the drive side some of the thread is gone, ...
2
votes
1answer
100 views

Does the glue in tyre repair kits expire?

I have a tyre repair kit that I bought ~4 years ago. I never used it. In fact, I never used such a kit in my life. Does the glue expire after some time, or is it good indefinitely? The tube is still ...
2
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0answers
22 views

Hercules Mixte 5-speed hub repair spring

I pulled apart a 5-speed coaster hub on a Hercules bike. It has 2 cables, one on each side. After removing a few internal parts, I came to what appeared to be a spring that was just a mangle of wire ...
5
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2answers
397 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 ...
14
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4answers
2k views

How to mount tires without tire levers?

Videos like this give the impression that mounting a tire with your hands only is stupidly easy. Now during my life I've mounted quite a few tires myself (probably ten times at least), always trying ...
2
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2answers
161 views

What tools to bring for road side chain maintenance

I've been making a lot of kilometers recently. Although I do proper maintenance on my chain (replacement, cleaning and lubing). It can always happen that one of the links break, or that I am with ...
5
votes
2answers
1k views

Chain stuck between chainring and frame

My chain fell out while switching the gears and now it is stuck between the chainring and the frame. (I'm not a native speaker nor a bicycle expert, the terms may be wrong) I tried to unscrew the ...
2
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2answers
54 views

how to remove broken grommet from recumbent seat (without damaging mesh)?

summary: Note this question is not about installing a new grommet: I know how to do that is about removing a grommet, so that I can install a new grommet in the already-existing hole details: I ...
2
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1answer
372 views

Aluminum fork dropout potentially compromised - advice?

I hope y’all can give me some advice. I bought a bike, had it shipped, looks great except one thing — the fork was slightly damaged in shipping. It’s carbon but the aluminum part that attaches to the ...
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1answer
146 views

Diagnosing hub wobble (Shimano Nexus)

I have a Babboe City cargo bike with a Shimano Nexus 7 rear hub. Just coming into home on my last ride there was a bit of noise from the drivetrain and, on closer inspection, some other symptoms. The ...
4
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0answers
178 views

Hole cover under bottom bracket: what is it and how do i screw it back in?

So I got curios what is behind this cover and had a look. Turned the bike upside-down, unscrewed it and took it off. When trying to screw it back in, I realized that there is nowhere for the screw to ...
0
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2answers
176 views

How to install a Hollowtech II crankset if it does not fit the top hat?

In threaded 2-part bottom brackets there is a plastic top hat/bearing insert/dust cover that goes between the BB's bearing and the spindle, so that they fit tightly and the spindle does not wobble. ...
2
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2answers
598 views

Repair parts from Shimano - What are these part for?

I got a new Cannondale bike with hydraulic disc brakes and Tiagra set from Shimano. With the bike came seom parts which I cannot identify. I think they have to do with the brakes, but can't find ...
4
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1answer
138 views

Carbon frame chipped by chain - how to repair?

I found out my chain is damaging my frame near the cassette. How can I repair this? It was damaged by my cassette in the indoor trainer which I am not using anymore. This is how it looks:
3
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3answers
969 views

How can I remove a stuck bottom bracket cup?

I am repairing the bottom bracket of a US$100 bike with hard 2,000 miles (3,200 km). At approximately 1,800 miles (2,900 km) the bottom bracket made a crunchy sound, and after that there was a lot ...

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