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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10
votes
6answers
760 views

Repair service specifically for bike commuters?

I'm not sure if this question is suitable for this site, Startups SE or neither, but here it goes: Is there already any sort of business model catering to bike commuters for expedited repair issues? ...
1
vote
2answers
73 views

Identify missing fender part

Let's play "identify the missing part"! While riding, something which holds the fender to the frame between the chainstays and just behind the bottom bracket fell off: Please help me make my bike ...
4
votes
3answers
17k views

Bicycle crank is wobbly

My bicycle's crank is sorta wobbly - it tilts left or right, according to pressure applied to pedals. How do I fix it? What tools do I need? Video showing the wobble.
6
votes
4answers
3k views

What's the strongest way to bond a cable stop to an aluminum frame?

I recently picked up another well loved GT road bike frame- it's in great shape aside from a missing downtube cable stop. The model is a ZR 4000 probably from 1999, it's 7005 heat treated aluminum. My ...
12
votes
7answers
917 views

Minimalist setup for a “travelling bike mechanic”?

I have very little living/working space of my own and so, in order to keep my personal bike in working order, I need to be able to transport "bike mechanic stuff" (e.g. tools, screws, cables, inner ...
4
votes
1answer
305 views

Replacing Crankset

My dad bought a 2004 Fuji Absolute hybrid used and I rode it to a DIY shop to get everything checked out. On the way, the the chain came off once (1.5mi). Turns out the right crank arm is a little ...
8
votes
2answers
7k views

How many spokes can break before I need a new wheel?

3 of the spokes on my wheel are broken. How can I tell if the wheel is still good to use? Can I just replace the spokes or do I need to buy a brand new wheel?
3
votes
3answers
708 views

My rear wheel isn't properly spinning. How can I tell whats wrong?

I'm just getting back into cycling after a long hiatus. My bike is a little old and worn and its got some issues. The biggest one is the rear wheel. My rear wheel spins, but it seems to be off center....
3
votes
3answers
2k views

What are my options for correcting a bent aluminum fork?

I have a Cannondale ST700. A few weeks ago, I had a head-on collision. At first glance, the bike was fine. But the next time I went to ride it, it pulled to the side when I turned. Turns out my fork ...
3
votes
1answer
2k views

Vintage 1979 Peugeot roadbike rear derailleur change

Hello guys, The rear derailleur (6 speed) on my bike (picture attached) shattered all of a sudden while biking uphill after a few months of problems with the chain not fitting immediately on the ...
4
votes
2answers
578 views

Diagnose grinding sound from single rear cog

I've got a '70s-era ten-speed road bike with (what I think is) a Huret Eco rear derailleur which shifts well, but for some reason a loud grinding sound emits from the rear of the bike when using the ...
2
votes
2answers
370 views

Wobbly wheel/hub even when I tightened the cones

The wheel has a sideways wobble eminating from the hub. I tried adjusting the cones to the point its too tight but the wobble continues. Upon closer inspection there is play in the point where the ...
3
votes
1answer
2k views

How to re-shape a bent steel fender

I've got an old road bike with polished steel fenders, the rear one of which unfortunately got bent during transport: As you can see in the lower half of the photo, the two sides of the fender were ...
1
vote
1answer
204 views

MTB gear xx1 repairable?

I have an XX1 cassette, and broke the cog with 24 teeth, is this replaceable or repairable?
3
votes
2answers
2k views

Headset can't tighten enough without stiffening steering, damaged bearing retainers?

I've just cleaned and regreased my headset (which is the stock Cane Creek headset on my bike). In doing it I've noticed that the bearing retainers are out of shape; they are not perfectly circular or ...
1
vote
2answers
146 views

Feasability of repairing '70s-era welded-steel luggage rack

I've got a '70s Motoconfort (Motobecane) with the original "French randonneur-style" front luggage rack (it looks like a very small porteur rack): In the photo above, the rack is mounted to the bike ...
0
votes
1answer
718 views

Bottom bracket feels rough, should I replace it

My bottom bracket feels rough when I turn it with my fingers. I don't notice any problems when it's all assembled, but it's definitely not smooth like the other parts of much bike like my pedal axles. ...
1
vote
1answer
463 views

When I shift to the smallest cog, it's suddenly too loose

The other day I was riding with the chain on the smallest cog in the back (and the middle chainring in the front) and suddenly something felt like it slipped and the chain was suddenly way too loose. ...
3
votes
1answer
2k views

Correct setup of Huret rear derailleur

I've got (what I think is) a Huret Eco rear derailleur which seems to somehow get "stuck" in an "open" position when shifting on the front chainrings, i.e. the return spring somehow stops "working" ...
4
votes
6answers
1k views

What to do with my old bike?

I have an old, cheap, second hand bike which I use for commuting. I have to leave it on the street for 10 hours every day, it is old with damaged stickers and dirty which makes it less likely to be ...
2
votes
1answer
298 views

Can 'Zefal All in 1' really doall of those: cleaning, degreasing and oiling?

Can someone tell me if 'Zefal' All in 1 Spray is good for: degreasing, oiling and cleaning? Link It seems suspicious because it covers 4 very distinct functions in a single spray; eg: Degreasing, ...
6
votes
1answer
480 views

How to assemble '70s-era center-pull brake

I've (supposedly) got a 1976 Motobecane Le Champion with what appears to be the original center-pull rim brakes, which unforunately are not in one piece and need to be re-assembled: As you can see in ...
3
votes
4answers
436 views

How to fix folding lock holder

I've got an ABUS Bordo Lite folding lock and the holder it came with which attaches to the bicycle's frame using two thin metal strips and/or two Velcro straps is now broken: As you can see, the soft ...
3
votes
2answers
325 views

How can I fix the hook of a weather proof pannier?

I have a pair of Mainstream panniers (msx sl 55) but the rivet that holds the hook on the bag fell off. You can see it on images outside and inside How can I fix it while maintaining it weather proof?...
3
votes
1answer
120 views

What am I looking at in my rear hub?

I had a broken axle, and on the side where it broke (I think) these are the bearings that looking at. As you can see, there is a track of bearings, and then on the other side, two more bearings ...
0
votes
1answer
900 views

Can I convert freewheel hub to use cassette?

I'm converting a 1989 Trek 830/Antelope MTB to a commuter and it has a freewheel. Can I convert it to a cassette with the same hub?
2
votes
1answer
1k 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 ...
0
votes
0answers
851 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. ...
4
votes
2answers
420 views

Seat Stay Replacement - Bridgestone MB-3

I am working to restore my first mountain bike frame, a "vintage" 1993 Bridgestone MB-3. Early on, I swedged the left seat stay so that it buckled a bit & rotated about 15 degrees inward. I have ...
1
vote
1answer
595 views

24 gear SRAM shifters- PROBLEM

So recently i bought a carrera vengeance for £45 which is a bargain and the only problem was the gears(24 gear SRAM shifters) for the left side. When i got it i tried to shift but it just clicks and ...
3
votes
4answers
532 views

Ease of servicing brifters

How easy are "brifters" (e.g. Shimano Total Integration or Campagnolo ErgoPower) to maintain and adjust as a hobby cyclist at home?-- Although quite a lot of road bikes have them (including even light ...
4
votes
4answers
940 views

Are all vintage bikes difficult to work on?

I have had a couple of vintage bikes (from the '80s and earlier) and all have been absolute nightmares to work on: They always seem to have weird dimensions which aren't available anymore or in the ...
1
vote
2answers
325 views

Where to get replacement bolt for rod brakes

Well, I did it again: While working on a bike with rod brakes I lost the bolt which connects the two "actuating" rods to each other (I have no idea what these parts are even called; The measuring tape ...
3
votes
3answers
12k views

Hard to pedal even on flat street

I have a woman's cruiser bike with pedal brakes only. Everything has been working great but when I took a bike ride the other day I was on a flat street and it was extremely difficult to pedal...why ...
3
votes
6answers
2k views

List of tools to take apart a bike to minimise space for storage

I have a bike that I would like to take apart to store for the winter. I live in a college dorm and don't have much space. What are the basic tools that I would need to take it apart? I think taking ...
3
votes
0answers
4k 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 ...
5
votes
6answers
2k views

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 ...
2
votes
2answers
1k views

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. ...
1
vote
1answer
147 views

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 ...
3
votes
2answers
2k views

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 ...
0
votes
2answers
827 views

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 ...
4
votes
1answer
2k views

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 ...
4
votes
2answers
3k views

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 ...
5
votes
4answers
10k views

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. ...
2
votes
1answer
235 views

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 ...
2
votes
2answers
121 views

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 ...
5
votes
2answers
3k views

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 ...
2
votes
1answer
479 views

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 ...
25
votes
6answers
32k views

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 ...
2
votes
4answers
642 views

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 ...