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.

Filter by
Sorted by
Tagged with
3
votes
1answer
178 views

How can I find replacement part for Mongoose scooter?

My daughter broke the quick release hinge bolt (I have no idea what to call it) on her Mongoose scooter. Where can I go to find a replacement part or at a minimum, what is it called?
3
votes
1answer
679 views

Fiido D2: shock absorber broken

I bought almost an year ago a Fiido D2 bike. I use it everyday for my commute to work and unfortunately it broke. I brought it to a bike repairer and he said that there's nothing he can do. The only ...
1
vote
3answers
184 views

Sram X5 RD limit screw

A RD was recently lightly smashed in. I straightened the derailleur hanger "by hand" and now it is "good enough" with some chain rub on the cogs. I set out to readjust the rear gears but am facing the ...
11
votes
3answers
2k views

Busted my bike hub & derailleur (I think) - how bad is it?

I screwed up :( Background leading to my foolishness: I've been straining my bike quite a bit with hills and inclimate weather, and I haven't been able to find my maintenance kit since I've moved, so ...
0
votes
0answers
65 views

Bicycle pedaling resistance on single speed e-bike

Recently, I've bought an ebike that is about 2 months old now, I've maybe gotten 100-150 miles off of it as a daily commuter. When I pedal, it would have a lot of opposing force or friction, and ...
11
votes
4answers
5k views

Why is a derailleur guard present only on more affordable bicycles?

Looking at http://decathlon.co.uk, I see a derailleur guard only on more affordable bicycles, e.g. this one. This one does not have it, and there seems to be no obvious way to install one. Are ...
3
votes
3answers
200 views

Welding steerer tubes

I've cut my bike's steel steerer tube too short. The bike has a fully integrated headset. I've asked both a neighbour who's an ex Specialized concept (Certini) mechanic now with his own shop (...
3
votes
3answers
130 views

How do I troubleshoot a cycle computer?

I have a cheap velo cycle computer made by cateye. It is a simple read out of velocity and clock and has no fancy functions at all. It worked fine for months, and then started "blipping" to double ...
5
votes
3answers
150 views

What can be done to seat post too long/saddle too high?

Recently a mountain bike --someone's hand-me-down--, came in my way. Size wise it might be slightly big for my ideal but within the range of manageable, I accessed. After trying a few times, however, ...
2
votes
0answers
119 views

Help identifying this $25 ebike

I picked up this folding bike for $25 thinking I would google it and have all the info I needed to get it functioning. Any help finding documentation would be great, what kind of battery can I plug ...
0
votes
0answers
59 views

Spin doctor Essentials II pump not working properly

I attach the pump head to the presta valve. It attaches properly and even a few PSI, like about 10 psi, go in and then the pump handle just wants to spring up and is very difficult to push down. I can ...
3
votes
1answer
37 views

How to loosen eccentric BB shell?

I have a one-year-old REI CTY 1.3. Aluminum frame, belt drive, with an eccentric BB shell for tensioning the belt. The bottom bracket itself is a standard Shimano BB-RS500, but I cannot identify the ...
2
votes
2answers
213 views

Can you fix a tube with a lighter?

I was thinking about a patching tiny puncture I got from a metal sliver in the road. I usually don't even attempt to patch tubes, I always carry a spare, put that on and recycle the tube and forget ...
3
votes
5answers
261 views

Is my Trek FX2 really toast?

I have a 2016 or 2017 Trek FX2 (if critical I'll look up exact year). Ride it daily for shopping, going to the gym and such. Store it outside, unprotected from rain. Took it to the store I bought it ...
0
votes
1answer
59 views

Why has my inner tube enlarged after moving from bicycle to repair

I got two punctures in my front inner tuner of my bike and when I have gone to reassemble, the inner tube appears to have stretched a significant amount and no longer fits along the rim of the bike, ...
0
votes
0answers
70 views

Is the Trek Navigator 200 too hard to restore

I got a freecycled Trek Navigator 200 that based on my assessment seems to be from 2004. I have repaired one bike before and was thinking about taking the this one as a new challenge but it seems to ...
1
vote
1answer
21 views

Hub compatibility for Felt Nine 60 2017

I have Felt MTB Nine 60 2017 and I want to change my rear hub but don't know how to look for compatibility. It says 6 bolt QR x 135.
0
votes
3answers
415 views

Why is my new front wheel not spinning?

Today my front wheel got flat. I took it for repair and when I went back home cycling it was very hard. It felt so heavy and that was not normal for speed 4, when I changed down to speed 3, 2, 1 it ...
3
votes
2answers
130 views

How to find a replacement and replace a broken kickstand?

My bike came with a kickstand, but today after a ride I noticed part of it had fallen off somewhere, as shown in the picture below: It used to look like this: As I don't have the part of kickstand ...
3
votes
2answers
329 views

Carbon fiber fork scratched. Paint over or replace?

I'm new to carbon fiber in general. The other day my fork scraped up on some concrete. I'm not too worried if it's a scratch; however, I am worried if it means the fork is a goner. I've posted a ...
0
votes
1answer
86 views

Fox F120 RL fork mystery fluid - with pics

The fork of the bike I bought used - a Fox F120RL (installed on a 2011 Trek Fuel 8 EX) has started leaking a weird see-through fluid from the side where you adjust compression and rebound. Does anyone ...
1
vote
1answer
204 views

How to repair a twisted Presta valve?

On one of my old bike, I have a twisted Presta valve: Unlike this user, I can't put glue on my valve because the air is leaking at the tip of the valve (where it is twisted). So, I want to know if I ...
4
votes
2answers
716 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
63 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
63 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
101 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
975 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
233 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
93 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
565 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
78 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
88 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
439 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, ...
2
votes
3answers
180 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
83 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
64 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
192 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
103 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
731 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
209 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
132 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
67 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
549 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
127 views

I need some help identifying a bike I just acquired

I need help identifying this bike.
4
votes
1answer
148 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 ...
4
votes
1answer
567 views

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

The pedal axle snapped just where it enters the crank arm. This left the threaded portion of the pedal axle in the crank arm hole. How do I remove this to replace the pedal?
5
votes
2answers
155 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 ...