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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8
votes
1answer
115 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
votes
1answer
81 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
108 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
97 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 ...
0
votes
0answers
27 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
votes
2answers
43 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
vote
1answer
49 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
votes
1answer
63 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 ...
2
votes
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
vote
2answers
57 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
214 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
votes
1answer
102 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
189 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
votes
0answers
83 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 ...
1
vote
5answers
141 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
votes
2answers
113 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
vote
0answers
48 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
vote
1answer
71 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
73 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
votes
0answers
21 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
votes
2answers
168 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
votes
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
votes
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
405 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
votes
2answers
39 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
votes
1answer
341 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 ...
1
vote
1answer
78 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
votes
0answers
102 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
votes
2answers
95 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
votes
2answers
596 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
votes
0answers
96 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
votes
3answers
572 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 ...
1
vote
1answer
70 views

How to get the fixed part of a bar-end shifter out of the handlebar when it is stuck?

I have a Shimano bar-end shifter where the fixed part is stuck in the handlebar. How can I get this part out in a way that I can reuse it in new handlebars? Note: I know that I have to loosen the ...
3
votes
3answers
207 views

How to measure and treat BSA bottom bracket housing misalignment?

I own an old Raleigh steel frame ('89) and wanted to install a cartridge bottom bracket (Shimano UN55). I noticed it was difficult to fit it in the housing. When installed, the square taper shaft ...
1
vote
1answer
82 views

Can I trust a carbon-fiber repair?

https://www.kijiji.ca/v-road-bike/city-of-toronto/felt-z4-carbon-road-bike/1497484952 That's the bike, I'm just concerned about the carbon frame repair. Seller said he did it himself and has done ...
6
votes
3answers
703 views

Recovery from a cycling mishap

I took my bike for the first ride of the season yesterday and unfortunately it was pretty short. As I was cycling through the rear gears I hear a plinking sound and then a large clunk. I stopped ...
1
vote
2answers
95 views

Quick release lever free spinning [closed]

I have a Stance 2020 27.5 MTB with Rockshox Recon front axle. My quick release lever will free spin when I try to lock in the front wheel. I have "fixed" it enough by tightening the screw, this ...
1
vote
1answer
166 views

Apollo Radar chain issues

I have an Apollo Radar MTB and its chain is beginning to look like it needs replacing seen as its worn. However after going to Halfords (as Apollo and Halfords appear to be together) and buying a new ...
0
votes
1answer
84 views

Is there a permanent (non-emergency) patch/boot for a tire, NOT for a tube?

I have a discontinued tire with a tiny hole in the sidewall. I’d rather keep/use the tire if possible. I’m very familiar with emergency tire boots, but those are for emergencies. I’ve left them on ...
1
vote
1answer
105 views

I can't track down the source of chain skip - what might it be?

Last summer it come to light that my bike is suffering extremely bad chain slip, to the extent I feel it is unsafe. From what I can tell, it only happens in the 50t ring, and the 34 may be ok, but it'...
3
votes
1answer
108 views

Replacing stem bolts

Rather than replace the stem on every rusty bike I come across, I want to replace some stem bolts which are rusted, cheap original ones. I know they can differ in size a bit so I would get some that ...
2
votes
2answers
131 views

Should “universal pedals” be avoided?

Are universal pedal axles weaker than standard axles? If so, should they be avoided? These are inexpensive pedals so let's focus on inexpensive normal, solid axles vs these universal pedals. Each ...
2
votes
1answer
42 views

Which are the best method to patch a gel saddle?

what are some ways to repair a gel saddle's hole? This is my problem is on this one: https://www.lidl.de/media/product/0/0/4/5/1/4/9/selle-royal-atb-trekking-sattel-show-gel-rio-mit-kantenschutz.jpg ...
2
votes
1answer
92 views

Help me fix play in Gossamer cranks

I just bought a used bike for cheap. The crank/pedals feel loose and wiggle a bit from side. I notice there's a hole straight through the crank where I feel like some part is missing, perhaps some ...
7
votes
3answers
1k views

What is the best approach to an again and again wobbling rear wheel

For the last ten years, I have been riding a mountain bike (Specialized/Rockhopper), and often rather wildly, through rough terrain (roots, jumps, ruts). I am around 110 kg (240 pounds). As a ...
6
votes
2answers
764 views

Lost left crank arm crank end cap

What parts do I need to put this back together? I've lost some pieces going for a ride but I'm not sure what exactly. I think I'm missing the end cap to the crank and maybe a spacer. I was heading ...
1
vote
1answer
59 views

Advice on correct spoke replacement

I need a replacement spoke for a Shimano WH-MT500 29er QR. Shimano dealer manual does not mention the spoke length. I've figued out its a 13G, double butted spoke but unsure about the length. I've ...
4
votes
2answers
222 views

Restoration after immersion - what needs doing?

I'm taking my usual approach to learning how to fix things - I've acquired a bike in need of repair (for free!), and am working it out as I go along. In this case, the bike got caught in a flood and ...
2
votes
2answers
1k views

Upgrading an old road bike

I own an old road bike from the 80’s I quite like. To this day, all the original parts are still on the bike, except the last mudguard that broke this year. The wear and tear is getting more ...
3
votes
1answer
602 views

Repair frame with crack by seatpost clamp

Is it feasible to repair a crack in a frame around the seatpost clamp? Being an aluminium frame I understand soldering is problematic. It doesn't matter if seatpost is fixed in place as per a solution ...

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