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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145 views

Where can I find a Shimano cs50 stopper fixing bolt?

Somehow I lost a single 'stopper fixing bolt' on my down tube cable stop. I have a set of Shimano sm-cs50 outer down tube cable stops, and I don't want to buy new ones because I only need one bolt. ...
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2answers
404 views

Can a 120mm fork be mounted on Specialized Myka?

I have this fork available: RST Gila T8 (120mm travel option). The 80mm XCT fork on a 2-year old Specialized Myka is getting worn. I am considering installing the fork. Here it is explained that ...
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1answer
2k views

What does vulcanizing solution in patch kits consist of? Can I buy it?

I have a pile of old patch kits for inner tubes that are complete except for the little tube of "vulcanizing solution" that comes in patch kits. With time, these tubes crack, or have a cap fail to ...
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3answers
259 views

Fork shakes on braking

I reanimated an old city bike. The front brakes work fine but the brakes squeaks. So I cleaned the rim and brakes, now the fork shakes on braking. What is wrong and how can I fix this? Change the ...
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2answers
521 views

Disc brake producing noise after a crash

After little crash I'm hearing strange knife-like sounds from my disk brakes, but the wheel and brakes doesn't look damaged. What should I do?
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2answers
605 views

What does a “dished” wheel mean? How to tighten spokes on such a wheel, without a spoke tension meter?

Should all the rear wheel spokes have equal tension? Or should the spokes from the side of the cassette be tighter, in order to skew to wheel in that direction, and the wheel to be centered in the ...
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3answers
882 views

Cycle tyre and tube burst

I pumped my cycle front tyre to 105 psi (700*23c) 5 days back and cycled some 60 km on the same day without any punctures. Afterwards I parked the cycle in my bedroom for the last 5 days (due to ...
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2answers
1k views

How to determine if my rear axle is bent?

When riding, the rear wheel feels as if there is a tiny pebble, stuck within the thread. The wheel is one week old, the hub is Shimano FH-M475. I have done only very tiny jumps - for example from ...
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3answers
145 views

Why would each patch produce a new leak before resintalling tube?

I got a puncture in my tube (size 700c x 23c, Kendra, came with bike) and applied a vulcanizing glue and patch, then checked it. Before reinstalling the tube, there was now a new leak right next to ...
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1answer
566 views

Bottom bracket mysteriously squeaking

Somewhere from the non-drive side of the drivetrain is coming loud squeak when I pedal hard. The story is long. First I threaded the BB-ES25 incorrectly, and had to spend half an hour with a file to ...
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2answers
221 views

How can I fix panniers that have got holes in

I've got some Crosso panniers that have got quite a few holes in. I once fixed a drybag backpack with patches of leather and industrial strength glue which worked like a treat, but I've forgotten what ...
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2answers
610 views

Way to fix outward dent in rim?

On a ride today I ran over a water run off too fast and have caused an outward bulging dent in both sides of my rim. The bulge is hardly noticeable to see or touch but I "think" I can feel it when ...
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3answers
2k views

Broken rear axle. Why does it happen and is it worth trying to repair?

So I'm taking the time during the holidays to overhaul my commuter bike. The whole drivetrain was full of old oil, road salt and grime so I decided to take the whole thing apart starting with the back ...
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1answer
129 views

Handlebars are slipping and the stem is cutting into my bars. How do I fix this? New bars and stem or just a new stem?

I bought a 2014 kink curb and I think I may need to buy new bars because my stem is cutting into them. I don't know though. If anyone could please help me with this.
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2answers
110 views

Why would tube patch sometimes peel off with backing?

Sometimes, when patching a tube, the newly placed patch will peel off when removing the backing. Sometimes I have this problem and sometime I don't and I'm not sure what the difference is. Is it the ...
2
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1answer
210 views

How to securely connect cable to AXA Quattro dynamo?

See the image: How do I securely attach the cable to the dynamo? I tried the obvious, threaded the cable through one of the holes in the plastic cover, and pressed the cover snugly onto the socket. ...
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4answers
616 views

New headset cups loose against the frame

Trying to replace the headset cups and race faces on a steel frame for 1" fork. Removed the old cups by gently knocking them in a circle with a steel pipe of the correct diameter. However, the new cup ...
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4answers
3k views

How can I remove a stuck rear cassette?

I've been trying in vain to remove a rear cassette that I myself installed about a year ago. I may have over-tightened the lock ring and now I can't remove it no matter what position I hold the ...
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1answer
186 views

Threaded headset wobbles after riding

This is my first time adjusting a threaded headset. After thoroughly cleaning, inspecting and greasing the bearings, I attempted to re-assemble the headset. The piece is interesting in that the lower ...
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2answers
181 views

Suitable remedy for chain damaged by bike shop

I've got a fairly old Dawes Discovery 301 (not sure of the year); earlier today I took it to a shop to have a replacement bottom bracket fitted. I rode it 2 miles home, and noticed a slight ...
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1answer
376 views

Maintenance of Fork springs on Marzocchi Bomber Dirt Jumper

I recently took my fork into my mechanic for service because it was making a rattling noise in one of the fork legs. Upon initial assessment he thought it was a broken return spring for the air ...
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2answers
446 views

How to route cables aroung the head tube?

Consider this illustrative picture: The cables are routed "across" the heatube. Id est the cable leaves the shifter, crosses the headtube and then curves back under the top or bootom tube. I often ...
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2answers
162 views

Should I oil new cable housings?

When installing new cables and housing, is is wise to oil the housing? If so, how? Here Hicks recommends spraying (but for re-newing old cables). On the other hand, I have found it intuitive to put ...
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1answer
171 views

Will this fork crown race installation tool work?

I am looking to purchase a fork crown race installation tool, ant this one is the only one available online. The IceToolz thing is "to be delivered" someday. I am very skeptical of this tool, as it ...
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1answer
216 views

Selecting a compatible BB: spindle offset

Replaced Shimano Bottom Bracket, now front derailleur won't shift to largest gear How do I measure a bottom bracket? I thought the only thing that mattered when replacing a bottom bracket ...
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1answer
1k views

Hydraulic brake cable invisible leak. Possible?

I've crashed hard, handlebar rotated as much as it could and I guess rear brake cable was stretched. Braking became soft. Time to bleed I thought. But I'm completely unable to bleed it. Tried some ...
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4answers
2k views

Plastic screw with ripped-off head stuck in the frame

So I attempted using a couple of shitty plastic screws to attach an air pump to the water bottle mounting holes in the frame. I was using a long-arm torque wrench and the head of one of the screws ...
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3answers
2k views

Best way to patch road bike tubes

I've scoured the internet for this answer, as I recently just tried to repair a tube on my Purefix fixed-gear bike which I assume uses tires and tubes similar to road bikes, as the tire size is ...
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1answer
153 views

Derailleur problems - rear mech slipping forward

I have been riding my Trek Fuel Ex 8 for a few years now, and as I have improved, I have been attacking more challenging terrain. I have started to notice a problem in my rear mech - the link arm ...
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3answers
235 views

Treacherous ride - top half of fork points backwards, but the bottom points forward

I have a Kent Glendale with dual front suspension. The top half of the fork is turned around so the right shock was installed into the left stanchion and vice-versa. and I cannot figure out how to ...
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2answers
290 views

Is it cost efficient to Convert a Huffy Mens mountain bike to a road bike like the one I rented at Orange Peel in CO?

While on vacation in Steamboat Springs CO I fell in love with a road or trail bike I rented and so did my family. We road for miles on a trail and it was great. I want to convert the mountain type ...
2
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2answers
218 views

Can you rebuild a Sram gear hub?

I bought a used bike with Sram 7 gear hub and after a few weeks, the chain started falling of all the time. I took it to a bike shop and they told me that the problem is in the gear hub, that it's not ...
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2answers
9k views

Deformed/uneven/bumpy wheel/tire/tube, how to diagnose or repair?

My bike has a deformation in the rear wheel, almost surely not due to the rim. At some point the tire has a "valley", causing it to bump instead of rolling smoothly. I'd like to understand if I have ...
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1answer
383 views

Repairing Carbon / Aluminum frame

My road bike is aluminum with a carbon rear triangle. The carbon rear slides into the aluminum, and I believe was bonded with some sort of epoxy. The pieces have begun to separate after 2.5 years ...
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2answers
444 views

Do I need to face my new frame?

I just purchased a new aluminum MTB frame. The headset is a standard "NECO, 142, 1-1/8” AHEAD". The BB is ... I'm not sure, but is internal and threaded. How do I determine if I need to face or ream ...
8
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1answer
370 views

Help please to identify my Tandem

I have just purchased an old tandem, but don't know the make or year. Can anyone help me to identify it. The frame is steel and it has a frame number of 452599. There are no decals fitted but I attach ...
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3answers
2k views

Is my derailleur hanger too bent?

I bent the (steel) derailleur hanger on my 9spd cassetted (steel) Bianchi Volpe about 1.5 yrs ago, and I just did it again, but worse. This time the derailleur got sucked into the wheel and really did ...
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3answers
1k views

Bike repair costs

I just started college and though it'd be nice to have a bike to get around and was looking at my mom's old road bike, but it definitely needs some work. It's a Fuji VALite 1769 frame with Suntour ...
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2answers
240 views

How many times to patch a tube before dumping? [duplicate]

Related: Patch or replace tube? This video asserts that: A properly patched area of a tube is stronger than intact tube area Never patch a tube more than 3 times Those are seemingly ...
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2answers
2k views

How to Patch a Bike Tube?

Related (but more general): What steps should I follow to patch a tube? I have done this more than a hundred times, but am still not sure what are the correct steps. Here they show to put glue ...
4
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2answers
10k views

How do I determine my wheel size

Would someone explain wheel sizes. If I am not mistaken, the wheels on my Trek 520 touring bike are 700C. There are no markings, and of course, no documentation of any kind. I assume 700 means 700mm, ...
2
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2answers
926 views

How do I know the model of my Shimano Torney SIS Index Rear Derailleur, I have a Vertical Henox T3 bike?

I had a vertical henox t3 bike which I hadn't ridden in a long time I changed gear and the derailleur bent into the wheel spokes and the derailleur is now bent and doesn't work properly. The ...
2
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1answer
235 views

Yet another stuck BB. Help me save my frame!

So I have two bikes and a year ago I went through the challenge of unscrewing a stuck BB. The solution was to put the tool in a vice and twist the frame around it. Today I have an even more difficult ...
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1answer
121 views

Rear wheel wobbles

my rear wheel wobbles while it spins, like in this video. I read in the comments that it could simply be a badly mounted tire. What's your advice on this, what should I do?
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1answer
644 views

Pressure gauge on my pump stuck at one value, what is wrong?

I have a Specialized Switch Hitter I have used for several years on both Presta and Schrader valves. Recently, my wife tried to inflate her tubes (Schrader valve) and could not get the pump to ...
4
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1answer
3k views

Upgrade/Replacement options for Cannondale Headshok DD50?

I have an older Cannondale that I love. It's an F600 comp (the special edition one in pumpkin orange), with a DD50 front shock. The problem is that the DD50 is WORN as all heck. Even when locked ...
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5answers
680 views

Fix / clean or throw away tire with 30+ thorn punctures?

I recently rode through a horrible thorn patch. I came out with 2 flat tires. Upon examination, I found that the tube was punctured in 10+ places. Throw away. The tire has 30+ small thorns in it. ...
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1answer
555 views

Can't get the drive side bottom bracket cup out

I have an older Raleigh frame that I converted to a fixed gear and the bottom bracket cup on the drive side has been painted over a few times and I can't get it out. This is the type of cup (the one ...
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3answers
426 views

What are the most common causes for hysteresis in the rear derailler?

I have often seen derailleurs on cheap MTBs to degrade in performance by showing hysteresis. By that I mean that to switch to a certain cog, one needs to shift one cog further and then immediately one ...
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1answer
152 views

Caliper bolts after crash: repair or replace?

A few days ago, I was looking down checking out my crank while riding and drifted into the LA River Bike Path and ended up crashing bending my front brake caliper. Can the recessed bolt that holds ...