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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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 ...
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How long will this alum frame last?
I picked up this very cool 96-97 GT rage from Craigslist with the intention of restoration- a few rusty pinch bolts, spider eggs in the brake hoods, grinding bearings and pitted races, and all the ...
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How to get this dustcap off?
I have this problem where my pedals seem to be able to be able to rotate on an axis perpendicular to the straight travel of the bike. To take off the cranks, I need to get past a dustcap. ...
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Rear wheel seizing
I Have a modern road bike, all has been good for 2 to 3 years. This morning my rear wheel/pedals/chain seized completely. I eventually found out the problem was the the wheel and/or axel thread and ...
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Kalkhoff Agattu (e-bike) Panasonic 24v engine dead - worth repairing?
UPDATE:
http://www.kalkhoff-bikes.com/en/bikes/e-bike/e-activity/agattu-impulse-8-hs-8-g-1.html
I went with one of the above. It's not a 2016 model though. The Impulse 2 drive is awesome.
My three ...
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Tire pressure decrease when the bike is idle [duplicate]
I ride a Btwin MyBike 7s.
Yesterday morning I noticed (for the first time since purchase) that in my rear tire, the tire pressure has decreased to a flat. I thought it was a puncture, so I refilled ...
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How to select cog for emergency single speed conversion with a broken derailleur
I broke the rear derailleur on my surly karate monkey recently. I had the bike setup 2x9. I decided to try and get home by converting to single speed via trail side repair (made easier by the ...
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How often do you need to bleed your Avid Elixir 1
I have a Trek bike with Avid Elixer 1 hydraulic brake. Not sure if it's a manufacture defect but I have returned to the shop 3 times since I bought the bike this April, for them to rebleed.
The ...
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Bicycle's inner-tube got puncture right next to the valve, How to patch it there?
There is a very small cut 1-2 millimeter or less long in the inner-tube, right next to where it's the bottom of the Schrader valve. The cut is only 1-2 millimeters far away from the valve's bottom.
...
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Separating the gear hanger from the derailleur
I am trying to exchange my rear derailleur. Now I have the problem of detaching it from the hanger, as you can see in the attached image, I was able to detach the gear hanger from the frame, but I ...
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How to replace derailleur cable housing?
My derailleur cable housing (sheath) has exploded:
I bought a new sheath of the exact same length:
PROBLEM: Now I realize that unlike brake cables that are like []------, derailleur cables seem to ...
- 353
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2
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Should I be able to peel off a glued tire patch?
One of the things that I've noticed with the low-cost tube patch kit that I bought is that I'm able to catch an edge of the glued patch with my knife or fingernail and peel the patch off the tube like ...
- 29.2k
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Dahon Folding bike, seat came right off!
I was adjusting the seat on my Dahon Vitesse D8 when the seatpost quick release simply fell off (yellow piece in the images I supply)
The piece that bends to stop the seat from moving came off ...
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Is rubber cement in stationery stores the same as in tire patch kits?
Is the rubber cement that you can buy at the stationery shop:
the same as what's in the little tubes of cement that come with your patch kit:
If not, then exactly what is different? What makes tire ...
- 29.2k
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4
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Sound when pedalling
I have got a new mountain bike(hardtail wtih powerspline bb) and it is on 100 kms. When I push the pedals I hear little sound from the left side. It is only from the left and I think it can be the ...
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Is it usual for a freehub to have play? [duplicate]
I have a new rear wheel (Shimano Ultegra WH-6800) and the freehub has about 1mm-2mm of play in it. When the cassette is installed and the wheel is on the bike I'm getting a lot of wobble which is ...
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Fix a wobbly Shimano freehub?
I have a brand new Shimano Ultegra WH-6800 rear wheel. The freehub has about 2mm of play in it. I can feel the play without the cassette installed by grabbing the freehub body and moving it. It moves ...
- 267
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Feeling of suddenly missing chain in bike while pedalling
I can't pinpoint the problem with my bike, but the feeling is that it suddenly feels like I have no chains, and then it comes back, like it's "skipping".
UPDATE: From the comments, I think the ...
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Can I fix a bad tube patch?
So I did a hasty fix this morning when I had a puncture. It got me to where I needed to go, but by the evening it was flat again.
I checked under water and there is that tiny little air bubbles ...
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1
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upgrading components on a Brava late 80 early 90
I want to switch to STI gear shifters for this 7 speed bianchi brava, that has sun tour components. I know that sun tour is not compatible with Shimano. I also would like to upgrade wheels, etc. ...
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Chain slips off biggest cog under torque
I have a relatively new Bottecchia bicycle, about a year and a half year old and underwent about 8,000km.
I almost always use the biggest cog on the front cassette. Lately I noticed that as I apply a ...
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What non-metric fastener heads are left on a standard bicycle?
I believe that we've for the most part made the transition to metric on contemporary bicycles -- at least for the tools we use to repair them, am I right?
For example, while many screw threads are ...
- 29.2k
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What is the name of this type of bolt for the front crank on my bike?
I recently had to take the front gear off of my bike and had some difficulty undoing the bolts. Because of their poor condition, I have decided to replace them. However, I have no idea what they are ...
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What caused this seat clamp / frame failure?
Here's my "long distance" ride, which is an old steel MTB without suspension.
I picked it up by the saddle to move it and felt some play, I thought the saddle rails might have been loose, ...
- 124k
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3
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Tire casing appears damaged
The casing of my back tire appears to be damaged. There is one spot where it is torn, and the tire bulges out when the it is inflated. I want to know what causes this so that I don't do the same thing ...
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How bad is it **really** to bend aluminium rims? Requesting evidence based answers [closed]
Context: Bicycle wheels can become untrue if the rim is bent, e.g. from hitting a curb.
The usual question: Can a bent aluminium rim be bent back straight?
The two camps (figuratively):
1. Sure, go ...
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1
answer
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Stuck Bottom Bracket
I have an 80's Fuji bike and It's definitely well past time to replace the bottom bracket. The adjusting cup came off fine, but the crank side cup is super stuck. I've tried stacking lockring washers ...
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Renovating bike, are there addon to make the rims look thicker? [closed]
I have an older road bike and I am looking to renovate it. The rims on my wheels are pretty thin, and I very much like the look of deeper rim wheels. Can I produce this effect without buying new ...
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Campagnolo Ergopower inaccurate shifting on high and low cogs
I replaced the G-Spring and G-Spring carrier on my 9 speed Chorus Ergopower.
Now it is shifting better and the clicks are sharper, but I can't adjust the derailleur to shift good on all gears good.
...
- 707
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Replacement of cup that holds bearings on huffy beach cruiser
I have a 1980 Huffy "Good Vibrations beach cruiser which has been in parts for a little while. I was able to find and put back together everything except I am missing one of the metal cups which are ...
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Shimano Claris shifter double/triple shifting up (when moving to smaller, harder cogs) on the rear derailleur
Although my rear derailleur is properly indexed it's suddenly started to double or even triple shift on an upshift - i.e. when moving to harder, smaller cogs on the cassette.
This happens whether I'm ...
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2
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Cyclocross tyre patching problems, bulging inwards
I bought a new cyclocross bike, very good very handsome. 2 days ago I rode it on quite a rough road composed only from rocks. Two punctures (slow leaking ones, cause only realised after coming home 2 ...
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Frozen lockring
I have been trying to get a lock ring off of an old wheel. I have the correct cassette removal tool and (homemade) chain whip. I've gone so far as to use a vise but to no avail. I'm attempting to turn ...
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Campagnolo Athena - Lost plastic part on front derailleur. Now the chain is droping on upshifting
Somehow the plastic part on the side/front of the derailleur is lost. Now I can't shift properly because the chain drops to the outside on an up shift.
The plastic part is visible in this image. Its ...
- 707
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Controlling the state of bicycle components
I tried to formalize the maintenance of a bicycle. Every component must be periodically checked using the following algorithm:
Begin
1: Wait for appropriate time
Measure the component wearout
...
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2
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How to fix precession in pedal axle?
The axle on my bike that supports the pedals appears to have loosened, so that there is precession in it - I can slightly jiggle the pedals back and forth in a perpendicular direction to the axis.
...
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What is the necessary equipment on longer bike rides?
Let me provide some context to the question. I mostly cycle alone and cover distances in the range from 45 km to 65 km; depending on the route, these rides last from less than 2 hours to well over 4 ...
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What's in this patch kit?
I have a patch kit (from Bike Hand) and it includes:
Rubber solution
Metal rasp
Patches
Along with the aforementioned supplies there are two small rubber tubes, hollow, and about 1cm long. What ...
- 5,508
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Cateye Computer Probe Wire Repair
I snagged the wire on my Cateye Mity 8 computer on the rack the other day and broke it mid wire. I'm going to fix it by splicing them back together. I'm worried about effects of getting the wires ...
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Bicycle maintenance notes, technical book: do you have one?
Well, I drive a car and I have a technical book (maintenance) and automatically I want to do the same for my newly bought bicycle. I would love to track repairs, maintenance schedules, changed / added ...
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Chain falls to the outside of the chainring, but I can't reproduce the problem
I have a Dahon Speed P8 that I use for touring Japan, which has about 3000km on it. The bicycle has 8 gears on the back, and 1 gear on the front.
Note: I love riding my bike, but honestly (and ...
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1
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Twist shifter cannot shift down – what might be the cause?
My son's bike is stuck on 7. When we try to shift down to 1, there are no clicks. It just shoots right back to 7. This is a dial/twist/grip shifter, not a trigger shifter. I do not think it has ...
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1
answer
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Campagnolo Ergopower Chorus 9 inaccurate shifting
My Chorus 9 Speed Ergo-power (~2005) got inaccurate during shifting. The local bike repairman couldn't get the dérailleur to shift properly.
Sometimes the chain don't jump down or up after shifting. ...
- 707
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1
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What thread is the rear wheel axle nut?
My father is trying to repair his old '65 (we think) Schwinn 3 speed. The only problem is he has not been able to get a replacement nut for the rear wheel axle. Local hardware stores have been unable ...
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2
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Cannot locate mysterious crunching/grinding noise
I've seen other posts on this general subject.
My BB seems tight, new chain installed by bike shop, gears all checked ... I am second owner of this Raleigh so no knowledge of past usage or ...
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3
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Why does my Rear bike tire slow down when Pedaling?
I just replaced a flat on my rear road-bike tire. I had also tried to replace the rear axle, By removing the axle completely, to a quick release lock but realized the axle that had been installed with ...
- 133
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How do self-sealing inner tubes work?
How do self-sealing inner tubes work? I understand it protects against objects up to a certain length, but do I need to still remove the offending object eventually? Or do I need to leave it in?
Are ...
- 407
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6
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How can I learn to take care of an old (70s era) road bike/get it back to working condition?
I found my mom's old road bike from the 70s tucked away in a corner of our attic. It's not in great condition and is pretty rusty. I don't know a lot about bikes from a mechanical or upkeep point of ...
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Damaged (bent) fork dropout - what are my options?
I have an old Dunlop mountain bike - I'm not sure whether it's a steel or aluminium frame. (I have had the bike since I received it as a kid probably 20 years ago.)
For some time, I've had it stored ...
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2
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cable too short to reattach into a sturmey archer 3 speed shifter
I've just been given a Rayleigh Chiltern. The only problem is, the cable has unattached from the gear shifter. I Googled how to re thread, but the cable isn't long enough at the top end to slide right ...
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