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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3answers
886 views

How exactly are pedals attached to crank arms?

Recently I tried to unscrew the left pedal of a bicycle by turning it counter-clockwise with a spanner lengthened with a piece of pipe. The net result is the spanner broke apart and the pedal is still ...
2
votes
1answer
2k views

Front brake lever will not stay tightened

I have a 2011 Trek Cobia with Hornet brakes. About an hour and a half into my trek through the woods this morning I noticed that (once again) my left brake lever was hitting my knuckle when I fully ...
3
votes
3answers
13k views

When do bearings need to be replaced?

How do I know when bearings need to be replaced? Should I go by time? Or is there a symptom to guide me?
3
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3answers
3k views

Is my local bike shop asking to much money to change a rear cog?

I normally have much love for my LBS, but I've moved recently and am a little unsure about this new one due to the fees he is asking. I have a flip flop hub with a fixed gear (18 tooth) cog on one ...
11
votes
7answers
20k views

How to remove a crank arm with stripped threads?

A friend called me up yesterday after a mis-adventure during his attempt at a bottom bracket overhaul. He stripped out the threads on the (left) crank arm while using a Park crank puller. In a pinch, ...
7
votes
2answers
266 views

What do I do when I don't trust my LBS to repair a problem they caused?

I have a Sturmey Archer 3-speed hub on an ex-single speed. I got a flat on my way to work and couldn't ride any more. So I jumped on the train and took it to the bike shop near work (the shop who ...
0
votes
2answers
320 views

RS Revelation '11 dual air fork leaks

I have a RS Revelation dual air fork. It's new, never used before. I installed it and after a few days I noticed, that it loses air. Maybe 20-30 psi over night. So at morning it's just too soft and ...
0
votes
1answer
797 views

pedal falling off axis

One of the pedal arms in my bike is loosening off the crank every so often. When it starts to happen, the pedal arm, that has square ends, and the nut will end up detaching from the crank, so I have ...
14
votes
13answers
2k views

What are the most important things to bring on a ride?

On one of my recent ride, my bike broke down. My rear derailleur got pushed into the rims and broke. Since I have never gotten stuck like that before, I've never bothered to take anything with me ...
2
votes
1answer
736 views

Front derailleur doesn't change from grear 1 to gear 2

I have a Shinamo Tourney front derailleur that doesn't change well from gear 1 to gear 2 (I'm new to bicycles so I don't know standards, so I think I should specify that gear #1 is the smallest). In ...
3
votes
2answers
4k views

How to take apart this rear BMX hub?

As shown in the photo, what tool do I need to take this rear hub apart? I assume I need a tool which will fit in the 4 notches. The problem I am trying to fix is that if you pedal, the rear cog spins ...
8
votes
2answers
405 views

I was in a collision the other day. What should I check?

I was making a left hand turn the other day when a u-turning vehicle t-boned me. I somehow managed to land on my feet, but the bike didn't fare as well. It landed on the drive side. My back wheel ...
15
votes
13answers
532 views

What tips do you have for making temporary “get me home” repairs?

I do some mountain biking in remote parts of wales. I usually carry a minimal tool kit: pump, spare inner tube, and multi tool. I'm wondering if you have any temporary 'get me home' repair tips I ...
3
votes
4answers
540 views

What to Look for In a Fixer Upper

I have decided to buy an older worn down bike and fix it up as my commuter. What things should I look for? I know I should check the frame for rust. But, that's about it. For example, is it easy ...
1
vote
2answers
125 views

How can I find inexpensive salvage repair (frame) parts?

I've got a 2008 or 2009 Titus X. I cracked one of the struts (probably the wrong term) in the rear suspension triangle. I'm hoping I can find a salvage part (still waiting to see how expensive a new ...
4
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2answers
2k views

I assambled rear wheel hub, but now rear wheel is not turning freely

I disassambled/assambled rear wheel hub, but now rear wheel is not turning freely, what have i done wrong?
3
votes
3answers
2k views

Best practice for patching snakebite pinch flats on skinny tubes

So, I tend to run 700x23c or 700x25c tires on my commuter bike. Sometimes I'm lazy and forget to check the air pressure and inevitably get a pinch flat when I hit some stationary object, pothole, or ...
5
votes
1answer
209 views

Unused puncture repair patch - what's its useful shelf life?

Sometimes I fish around in my shed for a repair kit and pull out a pair of patches which have been sat around for a while (a year?) I find the patches are stiff (even though they're still in their ...
0
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0answers
40 views

What sort of bike chain do I need for my bike? [duplicate]

Possible Duplicate: How can I tell which size chain my bike uses? I have a vintage Ross road bike, and the chain recently snapped during one of my rides. The bike has 2 gears in the front ...
0
votes
1answer
447 views

Clicking gears on new Electra Townie 8i

I asked a similar question related to slipping gears here: Slipping gears on new Electra Townie 8i but now I no longer get slipping, but clicking noise when the pedals are rotated either forward ...
4
votes
4answers
3k views

LBS said creaking under torque is normal?

on my last question i asked about a creaking/tick i was getting when i was stand pedalling on a climb. I took it to my LBS today and they said they had stripped all the crank and bb and re greased it ...
2
votes
4answers
2k views

Strange noise coming from bottom bracket/crank? any ideas?

ive just bought a trek 6300 and im getting a strange creaking coming from the crank/bottom bracket when im stand pedalling. it only happens when im stand pedalling, and only what appears to be on my ...
2
votes
2answers
1k views

Maintenance/Upgrades for Gary Fisher Joshua MTB

Let me start from the beginning: About three years ago, I broke my leg after buying a Gary Fisher Joshua MTB, when I was just getting into road and cross-country riding. I've only started riding ...
1
vote
3answers
16k views

How to fix problem with mountain bike chain falling off gears?

The chain on my girlfriend's bike came off the front gear today, it looks like the back gear changing mechanism isn't handling back-pedaling properly, whenever she pedals backwards the chain slacks ...
4
votes
3answers
8k views

Adivce on what to do next with crunching / slipping gears

About two weeks ago I took my bike to the local bike shop to get serviced. It was previously slipping gears under load and at the end I couldn't use the lowest gear going up hill it would just slip ...
2
votes
2answers
1k views

Does a hybrid truely have a wider tire or does a mountain have a wider tire?

I'm looking around my local bike shop and saw that the hybrids have a slim tire while a mountain has a more fatter tire. And when i researched it says the opposite. Please help me.
5
votes
1answer
980 views

Bottom bracket repair stand experience

Does anyone have direct experience with the ParkTool Team Race Stand or other brands/models of bottom bracket repair stands? If so, do you like it and why? A good answer for me will include the ...
1
vote
2answers
519 views

Small amount of wobble in wheel

If I grab my [suspension] forks tightly and push against the wheel sideways, there is a slight amount (few millimeters on 26" wheel) of play/wobble from the axle/hub. The QR is done up tightly. Is ...
3
votes
4answers
5k views

My crank fell off, how do I re-attach it?

I was out riding on my mountain bike when my crank unexpectedly fell off (video). How do I reattach the crank? There's a torque range specified (25-30 Ft-Lbs): how critical is this? I don't own a ...
3
votes
2answers
1k views

Repair superficial damage to a carbon frame

I have a carbon frame with an integrated seatpost. The saddle sits on a clamp that is meant to secure the saddle on the seatpost and NOT hold the weight of the rider too. I went on a ride and my knees ...
3
votes
2answers
674 views

Possible to repair a pushed in braze-on?

I have a Trek 7200 (Alpha aluminum frame) and it has two water bottle holder mountings, the top braze-on on the seat tube seems to have broken from over-tightening and has sunk into the frame. These ...
1
vote
3answers
864 views

Where is the proper location to measure the tube size?

I need to replace a tube in my bike. I know there are many tire sizes. I bought 26', assuming that my bike was that size, and realized when I got home that I didn't even know where to measure from. ...
5
votes
3answers
410 views

Shaky Freewheel

I posted a question some time ago about vibrations in the frame of my road bike (a 1973 Sekine). Recently, I determined that the rear wheel is sliding back and forth across the axle, with about 0.5cm ...
7
votes
3answers
677 views

What am I supposed to do when my chain falls off?

It happened when I "stepped on it" (on an empty residential street). It left the chain on the road. What tool(s) and parts should I have had with me, to fix it? It was replaced (new) two months ago, ...
3
votes
4answers
4k views

Which size spoke tool. Currently size 14

I have this spoke tool. The number I use on this tool is 14. I use it on a hybrid mountain bike. . I want to get one which is easier to use but I do not know which size. Here are the available ...
8
votes
5answers
564 views

Is a tire patch kit really necessary for urban commute?

I'm cycling for urban commute, on well-maintained roads and bike paths, Vittoria Randonneur "puncture resistant" tires, and at no point on my ride am I more than 1/2 mile (usually within 1/4, I bet) ...
6
votes
6answers
7k views

For a slightly warped wheel, is it worth getting it repaired?

My son has a relatively cheap kids mountain bike, no suspension or anything flash, and after a minor crash into a friend the back wheel is slightly out of true. It only causes issues under braking ...
3
votes
2answers
4k views

Slipping gears on new Electra Townie 8i

I just got an Electra Townie 8i bike and the gears are acting weird. I hear clicking noises when pedaling and sometimes it slips down to a lower gear. This is especially true for 4th gear. Is this ...
2
votes
2answers
683 views

How do I know if the tandem bicycle I've inherited is worth repairing? It has a serial # 459310 on it, no other identifiers

I've inherited a vintage tandem. It looks as if it has been spray painted, and has no identifiers, etc remaining on the frame. The serial # on the bottom reads -459310. Any ideas on a make or model, ...
2
votes
2answers
10k views

Shimano Revoshift repair

My bike has a grip shift (Shimano revoshift) which isn't shifting through all 8 gears. Even with the gear cable removed (it recently broke) it will only shift through half of the gear numbers and ...
4
votes
2answers
1k views

Squeaking sounds after lubricating the cogset and chain

My bicycle didn't produce any squeaks until the last weekend, when I decided to make a little maintenance. First, I used "Easy Clean" spray from the White Lightning brand to clean the cogset and the ...
3
votes
6answers
7k views

Adjusting rear derailleur - shifts to lower gear, but not to higher

Well, it will shift to a higher gear, but it takes two clicks of the shifter and it skips over a gear when it does shift. With one click the chain hangs on the current gear by the slimmest if threads. ...
3
votes
2answers
1k views

Electra Shifter (Revoshift) is hard to turn

My wife has a hard time turning the Revoshift grip on her Electra Townie 7D due to arthritis issues in her hands. Is there a way to help with this issue?
3
votes
5answers
14k views

How to straighten a bent derailleur hanger?

I've bent (again) my derailleur hanger. It's a replaceable hanger but for this summer I can't get an original one and I know that the non-original one I can get is made in a harder material and could ...
4
votes
1answer
652 views

Is my Fox RP23 Rear Shock blown?

I let all the air out of a used Fox RP23 shock (which I haven't ridden yet) to remove it from a frame, and a small amount of oil sprayed out along with the air. Is this normal or is my shock in need ...
5
votes
2answers
1k views

Is torque relevant for steel/aluminium? Where do I find torque specs?

When you are not dealing with carbon, is torque relevant? I've never seen it mentioned on the hundreds of answers here, or the hundreds of how-tos I've read elsewhere. Should I just tighten ...
1
vote
2answers
529 views

Repairing a twisted front rim in emergency?

The front rim got somewhat twisted. I do not have here the rimmer or the small tools to adjust the pins. According to my friend's version, the outer tire and the inner tire are in fine condition. The ...
4
votes
3answers
2k views

Fixing off-center Caliper brakes

The brakes pads of my front brake are off center, so far that when the brake is disengaged the right pad rubs slightly against the wheel even though there is plenty of clearance between the wheel and ...
10
votes
2answers
209 views

Buying a CO2 tyre inflater

I am thinking about buying a CO2 tyre inflater. I have never used one before and have 3 questions: Do they have enough pressure to get a road tyre up to full pressure (~100psi) When you use a ...
3
votes
3answers
302 views

Bike Repair Information in Germany

I have been riding a bike for many years now, but I am embarrassed to tell you all that I am an novice when it comes to repairing and maintaining bikes. I have always had a problem with repairing ...