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
2k views

Can I use a shock pump to inflate a tube?

I know that shock pumps are meant for high pressure applications so that they can withstand high pressures needed by suspension shocks. However, can I use a shock pump to inflate my tire in a pinch ...
4
votes
2answers
3k views

How do I determine my wheel size

Would someone explain wheel sizes. If I am not mistaken, the wheels on my Trek 520 touring bike are 700C. There are no markings, and of course, no documentation of any kind. I assume 700 means 700mm, ...
16
votes
22answers
10k views

What is a simple mnemonic for remembering the thread direction when removing pedals?

Given that pedal threads are different on the left and right pedals: the right side pedal has a right-hand thread (removes counterclockwise, installs clockwise); the left side pedal has a left-hand ...
1
vote
4answers
357 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
2answers
386 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 ...
5
votes
7answers
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 ...
3
votes
2answers
512 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 ...
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votes
1answer
113 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.
0
votes
3answers
588 views

Bike repair costs

I just started college and though it'd be nice to have a bike to get around and was looking at my mom's old road bike, but it definitely needs some work. It's a Fuji VALite 1769 frame with Suntour ...
2
votes
1answer
140 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. ...
21
votes
11answers
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
votes
2answers
104 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 ...
3
votes
2answers
503 views

Rear derailleur and front shifter are not indexing “together”?

So my rear derailleur and front shifter have stopped working together, my shift can shift once up and then nothing. My bike has essentially turned itself into a 2 speed. The shifter is a 2300 shifter ...
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 ...
5
votes
1answer
249 views

Repairing Carbon / Aluminum frame

My road bike is aluminum with a carbon rear triangle. The carbon rear slides into the aluminum, and I believe was bonded with some sort of epoxy. The pieces have begun to separate after 2.5 years ...
27
votes
11answers
2k views

Alternatives to buying a repair stand?

I'd like to buy a repair stand, but I can never seem to convince myself to drop the $100 minimum it seems I'd need to spend. Has anybody had any success building a stand themselves, or is it worth it ...
1
vote
1answer
129 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 ...
3
votes
2answers
306 views

Do I need to face my new frame?

I just purchased a new aluminum MTB frame. The headset is a standard "NECO, 142, 1-1/8” AHEAD". The BB is ... I'm not sure, but is internal and threaded. How do I determine if I need to face or ream ...
3
votes
3answers
7k 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 ...
2
votes
2answers
167 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 ...
4
votes
1answer
572 views

Hydraulic brake cable invisible leak. Possible?

I've crashed hard, handlebar rotated as much as it could and I guess rear brake cable was stretched. Braking became soft. Time to bleed I thought. But I'm completely unable to bleed it. Tried some ...
1
vote
3answers
1k views

How long does it take to replace bottom bracket bearings?

How long does it take to replace bottom bracket bearings? Is there anything that can make the procedure take more or less time? How does the type of mechanism affect repair time?
3
votes
2answers
287 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 ...
4
votes
2answers
139 views

Should I oil new cable housings?

When installing new cables and housing, is is wise to oil the housing? If so, how? Here Hicks recommends spraying (but for re-newing old cables). On the other hand, I have found it intuitive to put ...
1
vote
4answers
841 views

Plastic screw with ripped-off head stuck in the frame

So I attempted using a couple of shitty plastic screws to attach an air pump to the water bottle mounting holes in the frame. I was using a long-arm torque wrench and the head of one of the screws ...
1
vote
1answer
150 views

Will this fork crown race installation tool work?

I am looking to purchase a fork crown race installation tool, ant this one is the only one available online. The IceToolz thing is "to be delivered" someday. I am very skeptical of this tool, as it ...
2
votes
1answer
91 views

Derailleur problems - rear mech slipping forward

I have been riding my Trek Fuel Ex 8 for a few years now, and as I have improved, I have been attacking more challenging terrain. I have started to notice a problem in my rear mech - the link arm ...
2
votes
3answers
205 views

Treacherous ride - top half of fork points backwards, but the bottom points forward

I have a Kent Glendale with dual front suspension. The top half of the fork is turned around so the right shock was installed into the left stanchion and vice-versa. and I cannot figure out how to ...
1
vote
2answers
193 views

Is it cost efficient to Convert a Huffy Mens mountain bike to a road bike like the one I rented at Orange Peel in CO?

While on vacation in Steamboat Springs CO I fell in love with a road or trail bike I rented and so did my family. We road for miles on a trail and it was great. I want to convert the mountain type ...
3
votes
0answers
318 views

Pressure gauge on my pump stuck at one value, what is wrong?

I have a Specialized Switch Hitter I have used for several years on both Presta and Schrader valves. Recently, my wife tried to inflate her tubes (Schrader valve) and could not get the pump to ...
4
votes
2answers
745 views

How to Patch a Bike Tube?

Related (but more general): What steps should I follow to patch a tube? I have done this more than a hundred times, but am still not sure what are the correct steps. Here they show to put glue ...
4
votes
2answers
187 views

How many times to patch a tube before dumping? [duplicate]

Related: Patch or replace tube? This video asserts that: A properly patched area of a tube is stronger than intact tube area Never patch a tube more than 3 times Those are seemingly ...
16
votes
5answers
519 views

How do I align a wheel?

I broke a couple of spokes on my wheel, now it's all bent, how can I align it back again? What kind of tools do I need to do a good job?
2
votes
1answer
181 views

Yet another stuck BB. Help me save my frame!

So I have two bikes and a year ago I went through the challenge of unscrewing a stuck BB. The solution was to put the tool in a vice and twist the frame around it. Today I have an even more difficult ...
1
vote
1answer
114 views

Rear wheel wobbles

my rear wheel wobbles while it spins, like in this video. I read in the comments that it could simply be a badly mounted tire. What's your advice on this, what should I do?
9
votes
2answers
1k views

Restoring an old xUSSR bicycle for commuting… Feasible? Silly?

I've got a very old bicycle from the xUSSR days in my garage (outside UK atm). I'm not sure what year / model it is, to be honest... I've been commuting to work (8.5 miles each way) almost every day ...
8
votes
5answers
527 views

Fix / clean or throw away tire with 30+ thorn punctures?

I recently rode through a horrible thorn patch. I came out with 2 flat tires. Upon examination, I found that the tube was punctured in 10+ places. Throw away. The tire has 30+ small thorns in it. ...
0
votes
1answer
264 views

Can't get the drive side bottom bracket cup out

I have an older Raleigh frame that I converted to a fixed gear and the bottom bracket cup on the drive side has been painted over a few times and I can't get it out. This is the type of cup (the one ...
2
votes
1answer
170 views

Size of Pedal Threading on old German Glockenlager?

I removed the pedals of a Göricke bike from 1934 or 1935 (according to the bike number). It has a Glockenlager (What is that in English? Bell shaped bottom bracket?) as seen in the picture. The crank ...
3
votes
3answers
238 views

What are the most common causes for hysteresis in the rear derailler?

I have often seen derailleurs on cheap MTBs to degrade in performance by showing hysteresis. By that I mean that to switch to a certain cog, one needs to shift one cog further and then immediately one ...
0
votes
1answer
123 views

Caliper bolts after crash: repair or replace?

A few days ago, I was looking down checking out my crank while riding and drifted into the LA River Bike Path and ended up crashing bending my front brake caliper. Can the recessed bolt that holds ...
2
votes
1answer
313 views

What tool is needed to adjust this headset on a children's bike?

My daughter's bike has a threaded headset, and I don't know what tool I need to adjust it. As you can see from the picture, there are the following parts in the stack: a knurled ring, which ...
3
votes
2answers
587 views

How can I remove the bottom bracket from this old road bike?

I need some help removing this bottom bracket. I am obviously no mechanic, and watching several videos on youtube I found nothing that could help in this specific case. Basically after removing both ...
1
vote
2answers
377 views

Bottom bracket cup doesn't fit on non drive side

I'm replacing the crankset and bottom bracket on my old steel frame road bike, which looks like this one, so I'm guessing it's from around 1985. I picked up a 68 mm square taper bottom bracket and ...
0
votes
1answer
382 views

repair scratches on surly frame

I am a happy owner of a Surly Cross Check frame, two years old. Today I put it against a pole, but a strong wind blow made it slide along the pole and fall to the ground. As a result, there is one ...
11
votes
4answers
7k views

How do I know if it's worth restoring my bike?

I found myself in need of a bike, but buying a new one is out of the question. So two possibilities remain: buy a used one for a low price; fix one of my old bikes. But here comes another problem ...
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1answer
138 views

I'm worried about my derailleur snapping. The chain isn't running around the bottom pulley, it's running next to it

I'm worried about my derailleur snapping. The chain isn't running around the bottom pulley, it's running next to it, scraping against the bottom pulley and the frame. When I change gears it makes a ...
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vote
2answers
2k views

How to fix a stripped pedal crank

The threads on my bike's pedal crank just became fully stripped and the pedal fell off, though the pedal itself is fine. Is there any way I can fix this without fully replacing the pedal crank?
3
votes
1answer
155 views

How to replace a tube with only one quick stick?

So what is the correct number of quick sticks to swiftly change the tube? I had always thought that the answer is of course 2, but : I can do it twice as fast with one Quik Stick as you can with a ...
10
votes
7answers
12k views

When should you replace tires after getting a flat?

A nail punctured my rear wheel tire today while riding. My question is, how do you know if you need to replace a tire or simply repair it with a tube repair kit? The hole looks pretty nasty. The cap ...