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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4
votes
2answers
439 views

Left crank keeps coming loose

Often when I go to school on my bicycle the left crank arm starts to loosen up after one or two really gentle jumps. When this happens I just tighten it with the tool I have in my backpack. It went on ...
2
votes
1answer
57 views

Patching innertubes containing sealant

From my experience, I've learned that Slime will plug/seal a small hole in a tube. Sometimes the tube needs to be inflated 2 or 3 times for hole to seal. If a glueless patch is applied over a small ...
0
votes
1answer
49 views

Replace bottom tubes of Marzocchi fork with rigid tubes?

I have a KHS Montaña Comp mountain bike with 26" wheels. It has a Marzocchi fork that is completely shot, both left and right side of the fork. They hold no air, even spews oil and air if I move the ...
2
votes
1answer
87 views

Shimano SL-RS47 SIS handlebar shifter reassembly

How do I reassemble the Shimano SL-RS47-7 SIS left shifter on the handlebar after it became separated after an accident? The shifter became separated and I could only get it into first gear. It does ...
8
votes
3answers
900 views

Rear derailleur got caught in the spokes, what could be a root cause

I have several problems on this bike. Here are the elements that have failed and other pieces of information: the chain has derailed past the largest sprocket the rear derailleur has rotated 180 ...
3
votes
1answer
152 views

How to / is it possible to straighten a bent seatstay/chainstay on a steel frame? At home or inexpensively by a professional

I have a Genesis Croix de Fer 20 (725 Chromoly) and crashed with my friend on his bike. On one side the back of the frame bent out so the wheel drops out, it is bent but not crumpled. I would like ...
2
votes
1answer
90 views

A clicking every couple of pedal turns (video included)

I have been using a hybrid trek for a couple of weeks. The bike is still very new with only around 150 miles done. This morning on a ride it kept clicking every few pedal turns. I cut the ride ...
2
votes
2answers
508 views

Bent Peugeot Carbolite 103 Frame

I have a vintage Peugeot carbolite 103 frame which is really bent. The rear triangle is bent in the direction of the drive side to such an extent that the drive side crank arm is blocked by the frame ...
1
vote
1answer
66 views

Can't tighten thru-axle

Long story short, my cone nut came off while riding. Can I put it back without dismantling my freehub? And why I can't tighten my axle anymore? Only way I can tighten axle is without wheel. As soon I ...
3
votes
3answers
62 views

TRP quadiem brakes - lever not in place

Today I got my new YT Tues bike and I've noticed that front brake lever came off the piston and I have no idea how to get it in place if it is even possible? Is it defective or can I fix it? Rear ...
3
votes
3answers
346 views

Replacement stem cap and bolt

Our oldest son has been alternating between mine and my wife’s bike (Carreras from Halfords) whenever he has to go anywhere, but over the last week or so we noticed he had stopped using my bike, ...
1
vote
1answer
59 views

Keeping a 2006 Giant SCR 3 on the road - 9 speed to 11 speed?

I have a Giant SCR 3 which was a freebie from a mate, who had it new. It's approx a 2006 I think, and I've had it about 5 years. I've spend a relatively small amount along the way at the LBS, ...
1
vote
3answers
76 views

Do you need to remove the disc rotor to replace a drive side spoke?

Today I had a spoke break in the middle of a ride. I did notice it had a wobble but I don't have the experience to tell what's passable. Even new bikes can have a slight wobble. so I dismissed it. I ...
3
votes
1answer
58 views

How can I get a snapped gear cable out of my Shimano brifter?

Shimano's brifters that route the cables under the bar tape make the gear cable turn through a tight corner to get into that routing. This seems to weaken the cables and, if they're not replaced in ...
5
votes
4answers
1k views

Rusty chain and back cassette – Replace or repair?

Reference of the chain: KMC Z51 Reference back freewheel: Shimano TZ21 14-28 Teeth 7 Speed Reference of the bike: BTWIN Rockrider 340 I recently acquired a second-hand bike and decided to repair it: ...
2
votes
3answers
173 views

Can the Shimano front derailleur prevent a gear of my bike from working?

I recently bought a used rigid mountain bike, I'm very happy with it but I realized yesterday that I couldn't access the smallest chainring. This one has a total of 3 front gears, but only numbers 2 ...
12
votes
6answers
4k views

Should I replace my bicycle tires if they have not been inflated in multiple years

A little over 5 years ago I bought a Magna bicycle. Within the first summer of riding it the rear brake fell apart. I finally got around to having he brake fixed this past month but I am worried about ...
5
votes
4answers
2k views

Unidentified items in bicycle tube repair kit

What are these items in my bicycle tube repair kit for? I found them in several repair kits but I do not know what to use them for?
1
vote
1answer
61 views

Pedal sometimes getting stuck

Back story During this weekend we went on a trip with rented bikes, and observed the following problem on one of them: the left pedal would sometimes not spin on the shaft (i.e. it remained in the ...
2
votes
2answers
266 views

What replaces Shimano Deore LX rear derailleur RD-M570?

They stopped making my current derailleur in 2003. I need to replace it. How do I choose a replacement part? A good answer will tell me a specific part (with part number) that will replace the RD-...
2
votes
1answer
142 views

Clicking noise when cranks rotate

I've got an old `86 Raleigh fixed gear bicycle that is making a loud clicking noise when the cranks rotates. It seems to have just started doing this today. I'm looking for someone who, maybe has ...
-1
votes
2answers
115 views

Help identify this derailleur hanger

I need to buy a new derailleur but I can't find the same derailleur hanger, I checked all of the websites but I still can't find it. I don't want to buy it from a bike shop yet because it's more ...
-1
votes
2answers
62 views

Cause of dent on derailleur hanger?

I was cleaning my bike and when I take my rear wheel off I notice the quick release skewer is bent. I bent it back and when I lock my rear wheel back I notice the spin part of the skewer's plastic ...
2
votes
3answers
496 views

Is it ok to trim down a tube patch?

I got a 700x18-23 inner tube that just got punctured. The small round patch on my patch kit is a bit wider than the inner tube itself. Is it ok to cut around the patch so it fits? An added question: ...
1
vote
1answer
126 views

I need some help identifying a bike I just acquired

I need help identifying this bike.
4
votes
1answer
142 views

What is this part of a bicycle trailer called, and where can I find a replacement?

I have a Schwinn double bicycle trailer for my kids, but it is broken. The black plastic part pictured fits at the base of the right wall and connects it to the trailer frame. A bolt goes through the ...
2
votes
1answer
247 views

How to repair pedal snapped off crank arm? [closed]

The pedal snapped off the crank arm and there is a portion of it left inside. How do I dig this out and replace the pedal?
5
votes
2answers
136 views

Tubeless Tyre Repair

Last year I got a puncture in my tubeless tyre from a chunk of glass during a multi-day 500 mile ride (see photo below). The sealant did its job quickly and efficiently, and the seal has held without ...
2
votes
1answer
158 views

Disc brake keeps making ping-like shudder

I have a commuter bike with Tektro MD-285 hydraulic disc brakes. I commute about 14 miles every day (7 in, 7 out) in most types of weather, but I am not a performance cyclist by any means. It's just a ...
-1
votes
2answers
78 views

Need anti-rotational washer for Pedalease ebike

My Pedalease e-bike is missing one of the rotational washer and I have attached a photo of the the original ones it came with and I hope you could help me.
16
votes
5answers
2k views

Technique for self-adhesive puncture repair patches

Is there any special technique for using self-adhesive puncture repair patches? Today, I've had two different tubes fail within a minute of being inflated because the air pressure had split through ...
0
votes
1answer
48 views

Back wheel lock up, when got off wheel would move side to side [closed]

I have a 29 inch Iron-Horse/Sunday 24 speed. My back wheel locked up, when I got off the wheel would move side to side. I thought I lost bearings, took my freewheel apart and clean. Doesn't look like ...
1
vote
1answer
202 views

Which grease to use when servicing RST suspension fork

I would really need an answer because my forks got really stiff and I want to service them.
1
vote
2answers
126 views

Will any Shimano mountain bike shift cable set work with any Shimano mountain bike derailleurs and shifters?

(Forgive me if this question has been asked before - but I don't know if I'm searching with the correct keywords to find the answer...) My rear derailleur cable is stuck hard into the side of its ...
4
votes
2answers
176 views

How do I determine what types of maintainence I need to perform?

I just got a new bike and I want to make sure I’m able to keep it up properly. I am entirely new to this. Edit: thank you all for your responses, I’ll keep these all in mind and I’m adding them to my ...
5
votes
7answers
1k views

Bicycle Repair Stand Solutions for bikes with a Dropper style seatpost

Problem: I have at least one MTB with a dropper seatpost that does not allow for clamping on the seatpost itself and there is not enough room between the rear tire and seat tube to get the jaws in ...
0
votes
0answers
183 views

Shimano SPD pedal - visible seal ring

I recently got a pair of XTR M9120 pedals. Today I noticed an elastic ring visible on the axel, and bits of grease on it too. The ring can be seen on the service manual This has happened on both ...
3
votes
2answers
130 views

Old Sears Simpson bike bottom bracket replacement

Got the pedals out, but I'm struggling with both cups. I don't know which way the threading goes either. The bike was made in Poland, pretty old. Anyone know what I could do? I have a flat-shaped ...
3
votes
1answer
97 views

Can't fit damper back into suspension forks

I'm driving myself mad here trying to fix this. I work in a local bike rental / repair store, and took apart a bike's Suntour NEX 4610 V4 (2012?) forks from one of the rental bikes - now I can't fit ...
4
votes
3answers
766 views

Restoration project, help needed

I've been gifted this frame by a family member and would love to restore it to its former glory. I literally don't know where to start. The brake levers are frozen solid and don't move at all. The ...
1
vote
3answers
114 views

Bottom bracket replacement

I have an old '89 Trek Singletrack 950 with the original Shimano Mountain LX group bottom bracket. I'd like to replace the bottom bracket with something new. Can anyone help me determine what will fit ...
1
vote
1answer
471 views

My rear wheel axle has broken this is second time [duplicate]

Hi! my bike is Trek Marlin 4. I don't know why my axle broke so easy and this happened second time. its almost winter in my nation we don't have good bicycle shops. They will be close so soon. I can'...
1
vote
1answer
75 views

How to fix a crack in a silicone grip

I have a brand new pair of silicone grips. Somehow, one of the grips got a crack. Its mostly an aesthetic issue, as no fragments of the grip where lost. Is there any glue appropriate for silicone to ...
1
vote
1answer
180 views

What is causing my disc brakes to loosen when it rains?

I have Tektro Aquila disc brakes, and I have recently noticed that the brakes need tightening every time it rains. I don't see mention of this model in Are there any major outstanding recalls of ...
0
votes
6answers
656 views

Clicking sound on each rotation of the pedals only when riding

Let me prefix this by saying that I don't know much about bikes. Especially from the terminology perspective. When riding, I can hear a relatively quiet click when I push down on the pedals. It ...
2
votes
1answer
84 views

Fixing hub gasket squeal

I have a relatively new Salsa Journeyman, which has now, after about 200km, developed a squeal in the front hub. The squeal is relatively quiet on low speeds, but gets noticeably loud when riding ...
6
votes
2answers
348 views

Toothed plastic cup on bottom bracket got sheared off - still removable?

I messed up. I wanted to switch out the bottom bracket on my bike. When I tried to do that the toothed cup on the left side (non-chain side) sheared off. The entire thing is now plain with its housing....
5
votes
2answers
2k views

Derailleur hanger built-in/cast with frame — options if misaligned?

As per the photos below showing visible misalignment of the rear derailleur hanger: and secondly its construction (where it is built-in with the dropout and frame): Please could you help me and ...
3
votes
2answers
190 views

Is it possible to service rear derailleur pulleys?

The outer pulley of my RD-M735, when spun, sounds scratchy and feels slightly grindy as if there is a tiny piece of dirt/grit that has fallen inside. I have literally soaked it in WD-40 and then 3-in-...
7
votes
4answers
3k views

Bending back a bent head tube - is it worth trying?

I have a bike that was in a major front end collision (I T-boned a car). The frame is steel and the bike bent at the head tube, the welds seem to be fine. Pictures below. I am fully aware the ...