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.

16 questions with no upvoted or accepted answers
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70 views

Hole cover under bottom bracket: what is it and how do i screw it back in?

So I got curios what is behind this cover and had a look. Turned the bike upside-down, unscrewed it and took it off. When trying to screw it back in, I realized that there is nowhere for the screw to ...
3
votes
0answers
85 views

Carbon frame chipped by chain - how to repair?

I found out my chain is damaging my frame near the cassette. How can I repair this? It was damaged by my cassette in the indoor trainer which I am not using anymore. This is how it looks:
3
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0answers
5k views

Shimano STX rear shifter, broken spring

I have to repair a Shimano STX shifter 7 speed (from a Raleigh MT200 bike from 1995). It has a broken spring, and I am almost sure that is the only thing to be repaired. It is similar to that ...
2
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0answers
148 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 ...
2
votes
1answer
2k views

Identifying Rear Axle Size

I've got a bent QR rear axle and am looking for a replacement. Seems that these come in 9.5 and 10 mm sizes with a couple of different threadings. When I measure the OD of the threads I get around 9.8 ...
1
vote
1answer
101 views

I can't track down the source of chain skip - what might it be?

Last summer it come to light that my bike is suffering extremely bad chain slip, to the extent I feel it is unsafe. From what I can tell, it only happens in the 50t ring, and the 34 may be ok, but it'...
1
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0answers
144 views

Plastic Seat for Vintage Kids Tricycle

Anybody can tell me where to find this type of plastic seat? It sits directly on the tube, and holds on with a bolt on the middle. Thanks.
1
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0answers
1k views

Lowrider style bent forks techniques

Would a 24 inch bent fork fit on a 20 inch frame? Is there even a 24 inch fork? Would a 26 inch fit? Also if it doesn't fit in could I just add to the 20 inch - would you be able to extend it making ...
1
vote
1answer
4k views

How to reduce pedaling resistance

I brought my hybrid bike to Evans Cycles recently to get the rear gear mech replaced after I broke it. When I got the bike back, it was significantly harder to pedal. I tried moving my gears lower ...
1
vote
1answer
145 views

Why are my quill pedal cages “wobbling”?

The plates and connectors on my old quill pedals "move around" in relation to the pedal axle itself: In the photo below, I'm pushing the pedals to opposite sides to show how the pedal cage "distorts". ...
0
votes
1answer
91 views

How to dismantle RST 381L forks

I have cannot remove the elastomer/spring adjuster assembly from the top of the forks. I can remove the bottom of the forks. You undo the assembly for adjusting the tension with a 10mm hex key. ...
0
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0answers
75 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 ...
0
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0answers
68 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 ...
0
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0answers
91 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 ...
0
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0answers
518 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 ...
0
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0answers
1k views

Rear Hub Axle Appears Bent – Causes and Repair Strategy

I had my rear wheel off of the bike noticed that as I spin the axle it appears to be bent – the freewheel end of axle, for lack of a better way to describe it, orbits the centerline of the axle. ...