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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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Replacing brake lever on Shimano Nexus integrated shifter/brake lever

I have a Shimano Nexus Revoshift shifter with brake lever, part number SB-C6000-8, to use with a Nexus 8 internally geared hub. The brake lever has been sheared off where it joins the body of the ...
Ainlina's user avatar
  • 21
4 votes
1 answer
193 views

Seatstay eyelet cracked on carbon frame

I have noticed that the seat stay eyelet for my rack has developed a crack. I'm not sure if this is just in the veneer or if it's cracked the actual carbon fibre too. I only installed the rack a few ...
Harry's user avatar
  • 41
2 votes
0 answers
65 views

Warped MTB Tyres

I recently bought a used Canyon Spectral, which came with Maxxis minion and highroller 27.5 x 2.3 TR tyres. Both tyres appear to be warped. The rims are fine and I’ve tried installing with several ...
Neil Atkinson's user avatar
0 votes
0 answers
17 views

Shimano Dynamo DH-3N31-NH broken lead wire

The lead wire broke between the coil and the connector. The repair joint must fit into the axle groove. I have failed X2 to mend it. Can the lead be repaired at the coil?
Jim Hannley's user avatar
5 votes
3 answers
2k views

Is zip tie a durable way to carry a spare tube on a frame?

I have a number of bikes/scooters for which I want to be able to repair a puncture while riding. For the bikes I use the most, 622mm rim diameter bikes with 28mm-40mm tubes, I carry a spare tube in my ...
juhist's user avatar
  • 20.1k
3 votes
1 answer
19 views

Bottom bracket tightening old Mercier bike

(I don't know much about bike repair and I may have gotten some words wrong!) I inherited this old Mercier. Everything else is good but the pedal spindle is quite loose. I want to tighten it but it ...
ChatK's user avatar
  • 33
7 votes
4 answers
4k views

Why is my bike clunky, and what is this loose string?

I have a black sport trail all terrain Rockrider that I bought from Walmart for around 150 dollars. All was well for a few months, until I noticed a loud clunky sound with my pedals that made it hard ...
Muzzldmongrel's user avatar
0 votes
1 answer
72 views

Replacement crankset for a Specialized Sirrus X 3.0

I am looking for a replacement crankset for my Sirrus X 3.0, preferably a cheaper option. The stock crankset appears to have a spindle diameter of 24mm, spindle length of 107mm and 40 teeth. I have ...
414Sigge's user avatar
0 votes
0 answers
66 views

Rear wheel resistance but moves freely when not biking?

Hi all I'm at a bit of loss trying to trouble shoot my Surly Long Haul Trucker.I recently bought it used about 3 months ago and then had a new chain and cassette installed. Commuting back from work ...
Adrian's user avatar
  • 1
1 vote
1 answer
120 views

Bike repair put a 700-20 tire on my 700-25 road bike, should I replace it?

I had a flat tire in my rear wheel, so I took my road bike to the repair shop. They had to replace both the inner tube and the tire. After using it for 2-3 times. (mostly just going in to the gym or ...
hboogie's user avatar
  • 11
0 votes
0 answers
25 views

Confused about tire leakage, valve not attached

I’ve gotten a second hand mountain bicycle (felt brand), now the back tire is leaking air and is unusable. First, I thought that the tube was burst and would need replacing. But now I am just confused ...
Felt_mountain's user avatar
2 votes
0 answers
72 views

Rear hub is sticky and clacking when backpadeling

I'm having trouble with my Nexus 8 Hub. It started to feel strange recently after a tour. I got help by someone in a free bicycle garage. We opened up the hub, gave it an oil bath and greased all the ...
alveeoyn's user avatar
1 vote
1 answer
62 views

Fix slight twist in rim

I'm restoring a wheel from the local used bike shop. Over the space of 4 spokes there's a slight left and right twist in the rim. Think of it as a left tilt with an offsetting right tilt on either ...
Macfast's user avatar
  • 11
4 votes
2 answers
647 views

Disc Brakes disengage when braking, why does this happen?

I have a fairly heavy e-bike and I'm a fairly heavy rider. My bike has mechanical disc brakes, and around 5 months ago I was having an issue where the brakes became useless, as in when I applied them ...
John Tracey's user avatar
1 vote
0 answers
49 views

New tire tube and grinding noise?

I punctured my tire tube so i had to remove my back wheel out and replaced the tube, when reassembled, derailleurs started making grinding noises. I checked where the sound was coming and it was ...
user74879's user avatar
2 votes
1 answer
615 views

Reynolds double butted 531C top tube rusted, worth repair or not?

Pictures show underneath of top tube. Tube made of 25.4 mm (1 in) Reynolds 531C steel. Rusted through, cleaned a little with file, and most material is still there. Is it worth repairing? Carbon fibre ...
Fosgen's user avatar
  • 23
1 vote
0 answers
38 views

Need help with Columbia Lauderdale electric mountain bike

I was recently riding my bicycle, and hit a speed bump when it turned off under me. I checked out the bike and in the front motorhub there was a silver wire coming out of the bolt part. It looks sort ...
Gino Jinx Torres's user avatar
5 votes
2 answers
700 views

I need help fixing my axle

Here is my bike: https://www.trekbikes.com/gb/en_GB/bikes/hybrid-bikes/fitness-bikes/fx/fx-1-disc/p/27987/ What appears to have happened is that the axle through my hub has sheared off due to some ...
Joe Hearsey's user avatar
3 votes
2 answers
98 views

Shift lever can’t move cage to large chain ring. Shimano Ultegra 11 speed hydraulic

The large lever can’t be moved more than a short distance to where it would normally start moving the cage but won’t move any farther. It doesn’t move the cage at all. Something in the shifter is ...
Chuck White's user avatar
1 vote
1 answer
104 views

Play in headset

I serviced my headset few times on my new bike, each time without problems. But when I was serviced it few days ago, I had play in the headset that I couldn't get rid of. First I unscrewed top cap, ...
janko's user avatar
  • 11
2 votes
1 answer
191 views

Shigura - Can i use a Shimano XT Lever on A Magura HS33 Hydraulic Rim Brakes

Good day to Everyone, My Magura HS33 Lever on my ZHI Z3R trials bike broke, and i was wondering if i could replace it with a Shimano Deore XT BL-M775, as i have it stocked on my parts bin. And if i ...
Anni's user avatar
  • 316
4 votes
1 answer
239 views

Rear dropout nut constantly slipping

I've had this issue with my Kalkhoff Agattu (now out of warranty) basically since day one. The nut on the drive side of the rear dropout doesn't hold the wheel tightly enough, and it gets gradually ...
user72619's user avatar
6 votes
3 answers
311 views

Fixing a winter tire with poking studs using tube patches. Will it work?

My rear tire, a Schwalbe Marathon winter K-guard 120 studs, had some studs poking through the inner casing of the tire after approximately 1300km/1 winter season. It happened on two separate occasions ...
WornChain's user avatar
  • 2,201
1 vote
1 answer
54 views

Promax Headset Adapter 1", 1-1/8

I have a broken Cannondale 2007 Bad Boy Ultra, will the Promax Headset Adapter 1", 1-1/8" give me the opportunity to replace it with a non-shock standard fork.
Steven Lovelace's user avatar
1 vote
1 answer
113 views

Replacement for VP-BC73E Bottom Bracket

I cannot find my bottom bracket online anywhere. It's called "VP-BC73E ". However, I can find loads of "VP-BC73" (E is missing). Would it still fit/work? I found this information ...
James's user avatar
  • 13
7 votes
2 answers
128 views

Freehub removal

I need to remove this freehub (see picture), to replace a broken spoke, however, it is an old bike and I am unsure how to proceed? I've managed to removed the cassette using a chain whip and a 32mm ...
Luna 's user avatar
  • 73
5 votes
2 answers
186 views

Mavic Helium clincher wheels: Replacement Spokes

I have a Mavic Helium clincher wheels and a broken drive side spoke. I need a new one (and would be happy to buy a couple of them including non-drive side) but everywhere I look it seems I would need ...
Jack's user avatar
  • 51
3 votes
2 answers
144 views

Do I need a specific Sturmey Archer indicator chain/rod and cable?

Like the title says, I have an old refurbished bike from the 50's I want to get working again. It has a Sturmey Archer 3 speed shifter and internal gear hub, and that's about all I know about it. It ...
user2649681's user avatar
1 vote
1 answer
83 views

Can someone please give some advice to help find a new crankset?

I apologize in advance if I mix-up some lingo, I have almost no experience in fixing bicycle drivetrain. Previously I had Comet CKM-7159 as crankset (I managed to find this datasheet that seem to ...
kazaker's user avatar
  • 13
8 votes
3 answers
2k views

How to put a tube in a used tubeless tire

I switched to tubeless tires about a year ago and I love them. A couple months ago I had a problem with the back tire and had to pull it off the rim for the first time. There were literally hundreds ...
user66598's user avatar
  • 1,127
4 votes
1 answer
87 views

Stainless steel ladies bike frame failure?

i am new to this group and this is my first post. My Japanese Miyata ladies bike had this problem for so long time. The down tube had come out for about 3mm from its connecter. It looks like there ...
Samitha Niduwara Bandara's user avatar
3 votes
2 answers
176 views

Carbon Damage on bridge, repair possible? If so, what steps are needed?

This is a follow up question to: Attachmentpoint rim brakes carbon bike, sratches/crack? So. My bridge on my x lite 4 seems to be delaminating. Unfortunately Rose does not want to honor their six year ...
roverhendrix's user avatar
0 votes
2 answers
115 views

What color can I spray on top my green bike?

I want to do this without having to remove/strip having to strip paint from the frame which is already flaking off slowly.
Boniface munene's user avatar
0 votes
1 answer
121 views

Can I fit a damper to sr Suntour spring forks?

I bought a GT avalanche 3 second hand with seized forks. When I stripped them down to clean, there is a coil spring in one side only and no damper fitted. Can I buy a sr Suntour damper and fit that to ...
user70888's user avatar
5 votes
3 answers
688 views

Shop replaced my chain, bike had less than 400 miles

This past spring brought Canyon Endurace8 with just under 400 miles on it in for a tune up to get it good to go for a bike fit and to fix anything I may have not done properly when I assembled it, ...
Ponzo's user avatar
  • 151
3 votes
1 answer
80 views

Front hub motor makes clacking noise only when nut tightened

I have a Bafang SWXK2 e-bike front hub motor. It has been use for 7 years, about 10 000 km ridden and has worked well so far. But now it is making a clacking noise. Symptoms: Clacking noise ...
jpa's user avatar
  • 1,847
4 votes
2 answers
2k views

Glue for carbon fibre

Can anybody recommend a glue (perhaps a type of cyanoacrylate) for bonding carbon fibre? I'm not looking for advice on how to do the repair itself. I just want to know what brand or type of product (...
Jim's user avatar
  • 247
2 votes
1 answer
104 views

Bent Reynolds 531 Simplex stays at dropouts

I have just bought a Reynolds 531 Simplex bike frame and noticed the left chainstay and right seatstay look slightly bent at the dropouts. The right dropout appears to be incompletely inserted into ...
Ted Burgess's user avatar
8 votes
3 answers
511 views

Replacing crank/spider on belt drive bike (stripped pedal hole)

Edit: The bike is in a place with good mechanics but few shops. As I'm visiting the USA soon, I was thinking perhaps of getting the parts there and having someone competent locally do the repair. I ...
jonathanjo's user avatar
1 vote
0 answers
568 views

Shimano 105 r7000 front derailleur hard and clunky shifting, shifter harder to shift

A total newbie to DIY bike repair here, and my Shimano 105 r7000 FD is shifting really harshly after a wash. Washed it with dish soap plus water solution, however I did not give the FD any specific ...
justafred's user avatar
9 votes
7 answers
2k views

Is it possible to repair a dent on an aluminum frame using carbon fiber?

Every dent is unique so I think it is ok to ask this question once more. I have a Stevens Superflight 2020 which has a dent on a frame: My plan is to create some carbon fiber sleeve around the dent, ...
Євген Волощенко's user avatar
5 votes
2 answers
468 views

Mounting a tubeless tire using fire/explosion?

When I try to inflate a tubeless tire which I have just installed, it may or may not work: some tires leave a wide gap near the rim through which the air escapes without doing anything useful. This is ...
anatolyg's user avatar
  • 1,263
5 votes
1 answer
624 views

Nut dents on stamped dropout

Problem with stamped dropouts on singlespeed. There were dents from the nuts. It became inconvenient to operate the bike (the wheel is poorly fixed and constantly moves out). It is impossible to ...
ayr's user avatar
  • 153
5 votes
1 answer
800 views

Shimano Deore front derailleur return spring broken?

For a couple of days now, I am no longer possible to shift to the smallest chainring of my bicycle. There is simply no response at all (no resistance, no click-sound, nothing happens. The indicator at ...
user69238's user avatar
2 votes
2 answers
2k views

Bleeding Promax Decipher Hydraulic Brakes

I have a Promax Decipher Hydraulic Rear Brake on a bike I am trying to repair, but no idea how to bleed the brakes. I have tried to find something out there in internet land but the two videos I found ...
Brian B's user avatar
  • 21
1 vote
1 answer
163 views

What are the dimensions of a Trek Marlin 7 rear wheel quick release skewer?

My Trek Marlin 7 is size large and has 29-inch wheels. I want to replace the broken quick release skewer of the rear wheel and I need help finding a suitable replacement.
Chimp's user avatar
  • 11
0 votes
2 answers
122 views

My chain tool left a divot on my replacement pin. Is this normal?

I recently did a deep clean of my shimano 8 speed road bike chain by removing it from the bike. I used a chain tool to push out one of the pins (not the black one). I then replaced it with a 8 speed ...
TheLubeNinja's user avatar
21 votes
7 answers
5k views

14 "Trashed" bikes acquired for free. Worth repairing and reselling? What do I look for?

Very new to this, bike repair specifically. I tried my best with the tags. I'm mechanically inclined, like to tinker, and have many tools (not bike specific). Learning and time aren't really an issue. ...
PlayfulShad0w's user avatar
3 votes
1 answer
215 views

Why does a chain riveter have 2 separate pins to hold the chain

My (broken) chain riveter has 4 pins to hold the chain I always used the 2 on the left side since there is the possibility to apply counter-pressure with the screw. What is the purpose of the right ...
CuriousIndeed's user avatar
9 votes
1 answer
453 views

How should I go about getting parts for this bike?

Backstory I moved into a place and there was an old bike with the wheels & handlebar off. The landlord said I could throw it away but instead I want to try and fix it but it turns out I don’t know ...
Jacksonkr's user avatar
  • 251

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