Questions tagged [bolt]
The bolt tag has no usage guidance.
47
questions
7
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5
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A small bolt/nut came off my mtn bike while washing it, can someone help me identify it?
I was washing my’12 specialized stumpjumper. When shaking it/drying it off, a screw/bolt came off and I can’t find where it belongs and don’t know what it is. It has threads inside and fits a 3mm ...
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1
vote
1
answer
144
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I cannot find the correct Crank Arm Bolt for my bike
Recently, when I was riding my bike, one of the crank arms fell off and I realized that the crank bolt wasn't properly adjusted when I ordered the bike, hence when it fell off, I was able to put the ...
5
votes
1
answer
186
views
Can I somehow make it possibly to attach a kids trailer to this e-bike?
So, my e-bike and trailer got stolen. I couldn't afford the same e-bike again, went for a cheaper. Thought kids seat would work. Didn't. The bike would sway so much with my kid on the back I actually ...
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11
votes
2
answers
2k
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What is this "padding" on screws?
I removed my rear brake caliper for the first time, and found this white soft-to-the-touch padding on the screws. What is it? It was quite difficult to remove the screws and this must have been the ...
- 778
3
votes
2
answers
414
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Remove Shimano 105 left crank arm
I'm trying to remove the left crank arm. I've previously been able to do this with a 10 mm Allen key. But as you can see, this time it's stuck.
Does anybody know which tool is best for the job? I fear ...
- 81
2
votes
4
answers
476
views
How to remove this stripped brake bolt?
I recently purchased an old road bike and I am trying to restore it. One of the main problem was a rubbish brake installation by the previous owner.
I tried to remove the nut and the bolt that hold ...
3
votes
1
answer
129
views
Bolt size for Sora BL-3500 flat bar brake lever
I purchased a pair of Sora BL-3500 brake levers second hand. These were sold without handlebar clamp bolts. I optimistically thought I could re-use the ones from my old mid 1990's Shimano brake ...
- 1,412
3
votes
1
answer
304
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How to Remove Square Taper Chainring Bolts
I have removed my chainring from my Bicycle, but I do not know how to remove the chainring bolts I have tried using an Allen key but I cannot move it.
Do I need a special tool?
Here is a photo
Any ...
3
votes
1
answer
332
views
Missing bolt in my brakes, how can I find a replacement?
I was braking in a downhill, the gradient was steep so I was using both brakes mostly the rear. When suddenly the rear brake shifter went totally soft. I did a full-stop using my front brake only and ...
2
votes
2
answers
233
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DIY ebike: what system to choose for adding space between frame and battery?
So, the project is to install this 5kg battery:
on this bike:
This is no joke. I'm serious.
Following up to this previous question, I'm going to use steel rivnuts (aluminium is really too light for ...
- 333
2
votes
1
answer
757
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Blind rivet nuts for ebike battery on frame: aluminium or steel?
I'm planning my first installation of an ebike battery by drilling/riveting the frame (photo of the battery below), here are some details about the project:
The battery weights about 5 kg.
It's a ...
- 333
21
votes
10
answers
8k
views
Stuck pedal, I've tried everything
I'm looking for suggestions, when basically everything has failed to remove a pedal. It's a pretty new bike (Trek 520). The drive side pedal came off fine, the non-drive side did not. I am aware that ...
- 311
6
votes
1
answer
596
views
How to remove a seized & snapped bolt and extractor from a welded titanium cage boss
I have a titanium frame with aluminium bottle cage bolts screwed into it. I tried to remove them the other day and one of them snapped off at the head.
I drilled a hole through the remains and tried ...
- 3,548
0
votes
1
answer
92
views
seat post bolts won't fasten + spares?
got into a slight accident at home and my saddle has slid off my seat post. It looks like the rear bolt is now bent out of shape and the front bolt won't tighten at all into the nut. I wasn't sure ...
13
votes
5
answers
4k
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Why are bolts on bikes so wide?
Most bolts to mount accessories and minor parts to bikes are M5. A good example are bottle cage bolts. Components are often attached by M5 and sometimes even M6 bolts (eg long bike in quill stems, ...
- 9,454
8
votes
4
answers
825
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Handlebar slips in quill stem clamp when going over bumps
I bought this new Kalloy quill stem, with Sakae 25.4mm handlebars as pictured below. The handlebars were purchased at an eBay auction.
Here's the setup from the side
I've tightened the handlebar ...
- 170
4
votes
6
answers
2k
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I stripped one of four bolts on the faceplate of my stem. Is the stem usable until the replacement arrives?
The aluminium stem on my road bike says the max torque for each of the four faceplate bolts is 6nm. So I set my calibrated torque wrench to 6nm... and one of the bolts stripped its thread.
I guess “...
- 309
4
votes
1
answer
346
views
Skipping bolts on seatpost , please help?
Couple weeks back I bought this aluminium single-bolt seatpost .
Now, just 20 days later, the nut that tightens the the mechanism to fasten the saddle rails to the seatpost is skipping around and not ...
- 322
4
votes
1
answer
478
views
What tool do I need for this bolt that holds the crank arm on this stationary bike?
I'm amateur and got this stationary bike. The crank arm, I think that's what it's called, fell off. I can put the bolt back (the one inside the red circle) and turn manually but can't tighten it. ...
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2
votes
3
answers
902
views
What is my bicycle flange nut size?
As stated in my previous question, I am still trying to find the size of my flange nut on my seatpost. I need a new one because the old one was worned out. I bought a 3/8-16inch g/8 flange nut off of ...
1
vote
1
answer
1k
views
What is the size of my seatpost clamp nut?
I have this bicycle given by me by a friend, I kept adjusting the height of the bicycle saddle for different members of my family and now the sides of the nut are rounded.
The nut is used to adjust ...
1
vote
2
answers
742
views
Rounded out top cap bolt
I've rounded out my top cap bolt by using a bad allen key. I've tried most solutions to removing stripped bolts but none of these have solved this issue. If I use a large adjustable wrench and place ...
- 121
1
vote
1
answer
470
views
Options for what to do if the star nut is spinning?
I've been working on getting my mirrors to sit still when riding. They screw into a rubber block that presses out against the inside of the handlebars which backs off over time.
So I bought some ...
- 111k
3
votes
1
answer
208
views
Rear derailluer broken bolt
I am trying to figure out the right part to replace this bolt that broke. It went through the rear frame of bike into derailleur to a shimano dyna sys II unit. I believe it is a hanger bolt but the ...
1
vote
1
answer
152
views
Where can I find vintage hardware to mount a Raleigh 3 bolt chainring?
I need hardware (3 short bolts) for my Raleigh Super Course 10 speed made in Nottingham England in 1973.
The bolts hold the front large chainring to the smaller chainring that the pedals are mounted ...
- 11
6
votes
2
answers
373
views
Why are bolts of brake discs using Torx sockets?
Most bolts on bikes are using hex sockets. However, there is at least one exception: the 6 bolts of brake discs, which usually have Torx sockets.
What is the reason for this? Has the Torx socket a ...
- 333
1
vote
2
answers
742
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Bottle holder - aluminium or titanium bolts?
I'm a "weight-weenie" and optimize the bolts I'm using. Replacing steel with aluminium or titanium, depending of the location (to summarize: exerted forces, and dangerosity in case of breakage). ...
- 333
4
votes
2
answers
2k
views
Replacing stem bolts
Rather than replace the stem on every rusty bike I come across, I want to replace some stem bolts which are rusted, cheap original ones. I know they can differ in size a bit so I would get some that ...
- 12.3k
1
vote
2
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302
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Less than perfect bike grease for bolts and pedals
I understand that a good grease for bike bolts is the Parktool grease.
The "gel squeeze threadlocker blue" pictured below is sold at my corner hardware store for curbside pick-up. Will this do to ...
- 7,616
2
votes
2
answers
402
views
What is this bolt called?
It's part of my front axle and I need another one like this to keep the wheel on. Links to where I could buy one would be appreciated too.
The bike is a fatbike with suspension.
Bolt threads into ...
- 123
3
votes
2
answers
1k
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M9 nut for rear wheel axle?
I have been trying to find a bike shop or anywhere that still sells M9 nut which holds on the wheel hub next to the back wheel cassette for the cassette on my back wheel. I have a Vintage Sears Free ...
- 31
1
vote
2
answers
541
views
Disc brake pad release allen bolt
I have an Tektro Auriga Comp Hydraulic Disc Brake System. It's been running worry free for ~10 years.
But now I need to replace the rear disk brake pads (for only the second time). However the 3mm ...
- 113
0
votes
2
answers
1k
views
What to use on saddle clamp?
I'm purchasing a new seat-post as my saddle refused to stay at the same angle with my current one; it was a second hand bike (B'Twin Triban 500) with a single bolt clamp. I'm going to switch to a two ...
- 137
3
votes
2
answers
2k
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How can I find replacement part for Mongoose scooter?
My daughter broke the quick release hinge bolt (I have no idea what to call it) on her Mongoose scooter.
Where can I go to find a replacement part or at a minimum, what is it called?
- 133
3
votes
3
answers
713
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Which threadlock on bottle cage bolts?
The bottle cage bolts on my bike (carbon frame) tend to unscrew easily. Instead of tightening harder (I stopped at ~2Nm), which could damage the bosses in the frame, I am thinking of using threadlock ...
- 1,783
0
votes
2
answers
733
views
Seat clamp keeps unscrewing, what is the preferred solution?
To prevent stealing of the seat, I replaced my "fast lock" seat clamp with a model using a regular screw:
The problem is that the screw keeps unscrewing, and I'm already tightening quite strong. I ...
- 333
5
votes
2
answers
25k
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Left crank keeps coming loose
Often when I go to school on my bicycle the left crank arm starts to loosen up after one or two really gentle jumps. When this happens I just tighten it with the tool I have in my backpack. It went on ...
3
votes
3
answers
6k
views
How to remove a stuck SRAM AXS (Dub) crankset
I wanted to remove my relatively new SRAM RED eTap AXS crankset from my bike and I'm having problems trying to loosen (meaning: being unable to) the main 8mm hex bolt on the drive side, the step shown ...
- 175
0
votes
2
answers
119
views
Raleigh 300 Crank Bolt specs for replacement
I have a Raleigh 300 and the crank bolt fell off and was lost.
I have no idea how to find out what size crank bolt I should get!
Can anyone advise?
2
votes
2
answers
488
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Not able to get crank bolt into bottom bracket spindle
I recently posted a question about changing my chainset, I was advised on this SRAM chainset which I could use which would fit my square tapered bottom bracket.
I have attempted to fit the new ...
- 167
3
votes
3
answers
6k
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How to remove hex crank bolt
I have been looking online for tutorials on replacing a chainring (or three) for my Scott mountain bike: https://www.thebikelist.co.uk/scott/aspect-40-2012
When trying to take off the chainset so ...
- 167
6
votes
2
answers
5k
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Is my carbon fork steerer tube damaged by overtightened stem bolts
As per the title: I've had my bike serviced by a bike shop, who helpfully tightened up the stem cap and pinch bolts on my headset. I rode it approx 15 km (9 miles) and I noticed some play in the ...
- 199
3
votes
1
answer
153
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How can I un-seize track nuts?
I bought a set of these about 18 months ago now and for a little while they continued to work as they should but then now they're seized up.
Is there anything (short of ordering another pair) I can ...
- 867
5
votes
2
answers
306
views
Adapter for a M5 screw for a 6mm hole
I have lost the fixtures required to attach a bike rack.
The hole at the bottom of the rack has a diameter of 6 mm. It requires an adapter which sits in that 6 mm hole so that a M5 bolt fits snugly.
...
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2
votes
2
answers
2k
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Help! I've rounded off my bolts!
I was working on my bike and was about to add some more tension to my SLX clutch mech. While trying to remove the clutch cover I accidentally rounded off the bolts, so I have no way of getting the ...
- 1,076
0
votes
3
answers
1k
views
Replacing bolt and nut
I want to change my bolt because it is rusty. I am concerned that something bad will happen if I remove the bolt completely.
Can someone please tell me if it is okay to remove this bolt completely?
...
- 35
3
votes
1
answer
226
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Can't identify this bolt. Please help. Bolt from adjustable stem
I found this bolt from my friends bike (from an adjustable stem).
And I need another bolt like this for my second hand bike because it didn't come with it. It would be much appreciated if you can ...
- 39