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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3
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2answers
169 views

Feeling of suddenly missing chain in bike while pedalling

I can't pinpoint the problem with my bike, but the feeling is that it suddenly feels like I have no chains, and then it comes back, like it's "skipping". UPDATE: From the comments, I think the ...
6
votes
1answer
124 views

Can I fix a bad tube patch?

So I did a hasty fix this morning when I had a puncture. It got me to where I needed to go, but by the evening it was flat again. I checked under water and there is that tiny little air bubbles ...
2
votes
1answer
25 views

upgrading components on a Brava late 80 early 90

I want to switch to STI gear shifters for this 7 speed bianchi brava, that has sun tour components. I know that sun tour is not compatible with Shimano. I also would like to upgrade wheels, etc. ...
3
votes
1answer
115 views

Chain slips off biggest cog under torque

I have a relatively new Bottecchia bicycle, about a year and a half year old and underwent about 8,000km. I almost always use the biggest cog on the front cassette. Lately I noticed that as I apply a ...
1
vote
1answer
78 views

What non-metric fastener heads are left on a standard bicycle?

I believe that we've for the most part made the transition to metric on contemporary bicycles -- at least for the tools we use to repair them, am I right? For example, while many screw threads are ...
6
votes
1answer
175 views

What is the name of this type of bolt for the front crank on my bike?

I recently had to take the front gear off of my bike and had some difficulty undoing the bolts. Because of their poor condition, I have decided to replace them. However, I have no idea what they are ...
4
votes
1answer
151 views

What caused this seat clamp / frame failure?

Here's my "long distance" ride, which is an old steel MTB without suspension. I picked it up by the saddle to move it and felt some play, I thought the saddle rails might have been loose, but as per ...
4
votes
3answers
81 views

Tire casing appears damaged

The casing of my back tire appears to be damaged. There is one spot where it is torn, and the tire bulges out when the it is inflated. I want to know what causes this so that I don't do the same thing ...
-7
votes
2answers
108 views

How bad is it **really** to bend aluminium rims? Requesting evidence based answers [closed]

Context: Bicycle wheels can become untrue if the rim is bent, e.g. from hitting a curb. The usual question: Can a bent aluminium rim be bent back straight? The two camps (figuratively): 1. Sure, go ...
2
votes
1answer
69 views

Stuck Bottom Bracket

I have an 80's Fuji bike and It's definitely well past time to replace the bottom bracket. The adjusting cup came off fine, but the crank side cup is super stuck. I've tried stacking lockring washers ...
0
votes
2answers
96 views

Renovating bike, are there addon to make the rims look thicker? [closed]

I have an older road bike and I am looking to renovate it. The rims on my wheels are pretty thin, and I very much like the look of deeper rim wheels. Can I produce this effect without buying new ...
0
votes
1answer
169 views

Campagnolo Ergopower inaccurate shifting on high and low cogs

I replaced the G-Spring and G-Spring carrier on my 9 speed Chorus Ergopower. Now it is shifting better and the clicks are sharper, but I can't adjust the derailleur to shift good on all gears good. ...
3
votes
1answer
109 views

Replacement of cup that holds bearings on huffy beach cruiser

I have a 1980 Huffy "Good Vibrations beach cruiser which has been in parts for a little while. I was able to find and put back together everything except I am missing one of the metal cups which are ...
3
votes
2answers
252 views

Shimano Claris shifter double/triple shifting up (when moving to smaller, harder cogs) on the rear derailleur

Although my rear derailleur is properly indexed it's suddenly started to double or even triple shift on an upshift - i.e. when moving to harder, smaller cogs on the cassette. This happens whether I'm ...
1
vote
2answers
85 views

Cyclocross tyre patching problems, bulging inwards

I bought a new cyclocross bike, very good very handsome. 2 days ago I rode it on quite a rough road composed only from rocks. Two punctures (slow leaking ones, cause only realised after coming home 2 ...
1
vote
1answer
82 views

Frozen lockring

I have been trying to get a lock ring off of an old wheel. I have the correct cassette removal tool and (homemade) chain whip. I've gone so far as to use a vise but to no avail. I'm attempting to turn ...
2
votes
2answers
125 views

Campagnolo Athena - Lost plastic part on front derailleur. Now the chain is droping on upshifting

Somehow the plastic part on the side/front of the derailleur is lost. Now I can't shift properly because the chain drops to the outside on an up shift. The plastic part is visible in this image. Its ...
1
vote
1answer
68 views

Controlling the state of bicycle components

I tried to formalize the maintenance of a bicycle. Every component must be periodically checked using the following algorithm: Begin 1: Wait for appropriate time Measure the component wearout ...
2
votes
2answers
142 views

How to fix precession in pedal axle?

The axle on my bike that supports the pedals appears to have loosened, so that there is precession in it - I can slightly jiggle the pedals back and forth in a perpendicular direction to the axis. ...
7
votes
5answers
643 views

What is the necessary equipment on longer bike rides?

Let me provide some context to the question. I mostly cycle alone and cover distances in the range from 45 km to 65 km; depending on the route, these rides last from less than 2 hours to well over 4 ...
6
votes
2answers
219 views

What's in this patch kit?

I have a patch kit (from Bike Hand) and it includes: Rubber solution Metal rasp Patches Along with the aforementioned supplies there are two small rubber tubes, hollow, and about 1cm long. ...
1
vote
1answer
142 views

Cateye Computer Probe Wire Repair

I snagged the wire on my Cateye Mity 8 computer on the rack the other day and broke it mid wire. I'm going to fix it by splicing them back together. I'm worried about effects of getting the wires ...
0
votes
0answers
27 views

Best way to connect a wagon/ hitch [duplicate]

I welded a wagon for a bicycle. What is the best way to connect it so there will be free movement, but it will stay strong
7
votes
4answers
213 views

Bicycle maintenance notes, technical book: do you have one?

Well, I drive a car and I have a technical book (maintenance) and automatically I want to do the same for my newly bought bicycle. I would love to track repairs, maintenance schedules, changed / added ...
1
vote
4answers
476 views

Chain falls to the outside of the chainring, but I can't reproduce the problem

I have a Dahon Speed P8 that I use for touring Japan, which has about 3000km on it. The bicycle has 8 gears on the back, and 1 gear on the front. Note: I love riding my bike, but honestly (and ...
1
vote
1answer
145 views

Twist shifter cannot shift down – what might be the cause?

My son's bike is stuck on 7. When we try to shift down to 1, there are no clicks. It just shoots right back to 7. This is a dial/twist/grip shifter, not a trigger shifter. I do not think it has ...
1
vote
1answer
116 views

Campagnolo Ergopower Chorus 9 inaccurate shifting

My Chorus 9 Speed Ergo-power (~2005) got inaccurate during shifting. The local bike repairman couldn't get the dérailleur to shift properly. Sometimes the chain don't jump down or up after shifting. ...
2
votes
1answer
212 views

What thread is the rear wheel axle nut?

My father is trying to repair his old '65 (we think) Schwinn 3 speed. The only problem is he has not been able to get a replacement nut for the rear wheel axle. Local hardware stores have been unable ...
1
vote
2answers
252 views

Cannot locate mysterious crunching/grinding noise

I've seen other posts on this general subject. My BB seems tight, new chain installed by bike shop, gears all checked ... I am second owner of this Raleigh so no knowledge of past usage or ...
0
votes
3answers
342 views

Why does my Rear bike tire slow down when Pedaling?

I just replaced a flat on my rear road-bike tire. I had also tried to replace the rear axle, By removing the axle completely, to a quick release lock but realized the axle that had been installed with ...
6
votes
1answer
426 views

How do self-sealing inner tubes work?

How do self-sealing inner tubes work? I understand it protects against objects up to a certain length, but do I need to still remove the offending object eventually? Or do I need to leave it in? Are ...
10
votes
6answers
2k views

How can I learn to take care of an old (70s era) road bike/get it back to working condition?

I found my mom's old road bike from the 70s tucked away in a corner of our attic. It's not in great condition and is pretty rusty. I don't know a lot about bikes from a mechanical or upkeep point of ...
2
votes
1answer
249 views

Damaged (bent) fork dropout - what are my options?

I have an old Dunlop mountain bike - I'm not sure whether it's a steel or aluminium frame. (I have had the bike since I received it as a kid probably 20 years ago.) For some time, I've had it stored ...
0
votes
2answers
129 views

cable too short to reattach into a sturmey archer 3 speed shifter

I've just been given a Rayleigh Chiltern. The only problem is, the cable has unattached from the gear shifter. I Googled how to re thread, but the cable isn't long enough at the top end to slide right ...
-1
votes
2answers
180 views

How did this happen to my chainring?

So, this happened. All of this group of bolts but the one you see came out of my crankset: My question is.. how exactly do all those bolts wriggle themselves loose !? How do I determine what ...
0
votes
1answer
132 views

Is my six-year old touring bike worth repairing?

My touring bike (which I use for commuting) needs repairs which will cost £200... half the price of a new one. I am not mechanically-minded.... and I am too busy and too old to learn! A new bike ...
3
votes
1answer
126 views

Mtb weld repair Al frame

I am looking at a full suspension MTB with an Aluminium frame. It's cheap but needs to be welded as the frame is cracked. The bike is a Cult Insomnia 52 inch. It's cracked at the lower bracket, is it ...
1
vote
1answer
201 views

Repairing a damaged cone nut

So I've got a nice hybrid bike that I picked up secondhand, was doing some maintenance on it to get it up and running and thought I'd replace the bearings in the rear axle. In doing this, I've found ...
0
votes
1answer
99 views

creaky sound when cranking [duplicate]

My bike seems to all of a sudden developed a creaking sound when I pedal. It appears to be there in every gear. Bu t I noticed it appears to only happen when I put pressure on the left pedal. What ...
0
votes
3answers
353 views

Trouble Removing bottom bracket. Is it my Tool?

I'm having trouble removing my bottom bracket. I'm using quite a bit of force as far as I can tell. But neither side is budging. The bike is a 2011, and I've never removed the bottom bracket, but ...
0
votes
2answers
137 views

How to fix gears on a Kilimanjaro bike

I've just bought a Kilimanjaro bicycle for cheap. One reason it was cheap, I expect, was the gears system. It's only partly functional, and I don't understand why. I would go to the bike shop with it, ...
0
votes
1answer
457 views

guide to correctly assemble a Walmart bike [closed]

I bought a genesis max air from Walmart last fall used it a few times before the winter and two weeks ago brought it back out. For the last two weeks me and the wife have been riding about 8 miles ...
0
votes
3answers
363 views

Water inside bike frame

My latest "project" involves my bike, i.e. I want to perform a complete renovation of it. This involves changing rim, complete shift group, brakes, hubs, carrier etc, just keeping frame, seat post and ...
1
vote
2answers
65 views

Restoring a 16"

This here is my 16" bike which I'm going to at least try restore. I've put some wider bars on it, fixed loose things etc. My friend removed the pedal back but I don't think he has put it back ...
0
votes
1answer
178 views

replacing tires and tubes [duplicate]

I own a trek 7000 hybrid and was wondering if there are aftermarket parts i.e. inner tubes and tires that will work for it. the wheels, tubes and tires are all bontrager if this helps any suggestions? ...
0
votes
2answers
112 views

Shifting 1>2 does nothing, shifting 2>3 puts me into 2nd. What's wrong?

I'll be in first gear on my front derailleur, and shift up to 2nd. Nothing will happen at all. Then I'll shift up to 3rd, and I'll finally switch into second. 3rd gear is inaccessible. What could be ...
3
votes
2answers
509 views

Rebound doesn't work on a Rock Shox Recon Air

On my Trek Fuel Ex6 I have a Rock Shox Recon Air fork with rebound valve. The valve has a 2,5mm allen key for adjustment, but it seems broken. The Trek Suspension Setup Guide tells me to set the ...
0
votes
1answer
473 views

Fixie chain stuck between cog and hub

I had my chain jump off on my fixed gear when I hit a pothole, and it's gotten completely wedged between the cog and the flange of the hub. I've removed the lockring but can't get a chain whip around ...
3
votes
2answers
659 views

I have a broken my drive side crankarm - what do I need to do?

I recently had to dash home for a minor emergency. I noticed that one pedal was a bit wobbly but I had no choice but to push on. Once I got home and the emergency had been dealt with I noticed that my ...
1
vote
1answer
2k views

Replacing Tiagra 9-speed shifter with 9-speed 105 or Sora shifters

So my handlebars were stolen from my Salsa Casseroll the other night, levers and all. (Argh.) The bike has a Tiagra 9 speed triple drivetrain, and Shimano discontinued Tiagra 9 speed hardware, leaving ...