Questions tagged [bolt]

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votes
3answers
346 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
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1answer
63 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
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2answers
63 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 ...
1
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1answer
94 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 ...
2
votes
1answer
46 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
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1answer
89 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 ...
4
votes
1answer
195 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 ...
1
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2answers
153 views

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). ...
3
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1answer
156 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 ...
1
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1answer
114 views

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 ...
1
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2answers
204 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 ...
2
votes
2answers
190 views

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 ...
1
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2answers
131 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 ...
0
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2answers
298 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 ...
3
votes
1answer
352 views

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?
2
votes
2answers
238 views

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 ...
0
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2answers
177 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 ...
4
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2answers
7k views

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 ...
2
votes
1answer
2k 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 ...
0
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2answers
46 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
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2answers
190 views

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 ...
2
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3answers
2k views

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 ...
5
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2answers
2k views

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 ...
3
votes
1answer
138 views

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 ...
5
votes
2answers
144 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. ...
2
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2answers
872 views

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 ...
0
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3answers
506 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? ...
3
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1answer
210 views

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 ...