What is causing this sound?

[united4ever]

View: https://imgur.com/gB2hNOu


So bit of Background. Halfords did a brake bleed about 2 months ago and seems to have started soon after. I thought it was hydraulic disc brake pads rubbing so removed them, pushed pistons back and put pads back in. When i have the bike in bike stand and spin the wheel it spins fine with no noise so I think it's not brake pads now.

Went to Halfords again today since I was passing. The staff also tried spinning the wheel and agreed it was not brake pads. He then had a ride of it in car park and thought it was the bottom bracket and showed me there is a tiny bit of play there when you move it laterally. He said when he stopped pedalling and coasted the sound stopped which helped him reach that conclusion. But when i rode it afterwards and in the video above it still makes the noise when i coast/stop pedalling. He suggested new bottom bracket and bearings.

Any thoughts? I know Halfords are not the greatest. I used the fix my bike scheme and they did a brake bleed and called in this morning since it was on my route.

It's not so bad that I cannot ride it or anything but been like that all week and getting annoying.

 

[raggydoll]

I take it you can't pin point where the sound is coming from?

I've never known a bottom bracket to make that sound. In my experience when my bottom bracket needed replacing it physically had play in it, but no sound.

I'd be weary of taking it back to halfords for a new bottom bracket unless you are 100% sure. Halfords guy didn't sound convinced and as you say it is doing it when you coast too then his findings of the sound stopping when coasting are wrong.

Sounds more like a rubbing sound to me.

Could it even be as simple as a part of you mudguard rubbing on the tyre?
Or something like that?

If it was me I'd get it on the stand and do a process of elimination.

Take both mudguards off and see if the sound is still there etc..

 

[united4ever]

Yeah, it's funny because when I spin the wheels in the stand it does not make that noise. Not sure exactly where it is coming from because i have to be riding it for the noise to occur.

 

[ColinJ]

I've had noises happen like that. I think that it is when something is very close to rubbing but doesn't when there is no weight on the bike. When the rider is sat on the saddle their weight causes the frame and/or fork to flex ever so slightly and the rubbing starts.

Disc brakes often do drag slightly and can be fiddly to stop. I wouldn't rule that possibility out... (see above!)

 

[FrankCrank]

As Raggydoll says, sounds like the tyre rubbing on one of the stays, or on the mudguard itself? Prise the stays out a little and see if that helps. I strongly suspect the BB theory to be a red herring.

 

[PaulSB]

I think we can rule out the bottom bracket if only because the noise is coming from the front wheel. My money is also on the mudguard.

My first thought is to bend the stays out slightly and check if the attachment point to the forks is as high as possible. Then try removing the mudguard and go for a quick ride. If the noise continues you've eliminated the mudguard as the siurce, if it stops - bingo!

Then of course you have the miserable job of reinstalling the mudguard ensuring there is clearance everywhere. A miserable job.

These noises are usually only apparent when rider weight closes a small gap fractionally - very frustrating!

Good luck.

 

[Punkawallah]

If the above is a bust, I’d check the wheel position in the drop outs, then see if the wheel is true. Could be a ‘lump’ in the wheel which causes the tyre to hit the mudguard when your weight is on the bike.

As an aside, anyone else have imigur needing you to enter your machine pass code? Found it disturbing, so re-set the iPad.

 

[cyberknight]

I take it you can't pin point where the sound is coming from?

I've never known a bottom bracket to make that sound. In my experience when my bottom bracket needed replacing it physically had play in it, but no sound.

I'd be weary of taking it back to halfords for a new bottom bracket unless you are 100% sure. Halfords guy didn't sound convinced and as you say it is doing it when you coast too then his findings of the sound stopping when coasting are wrong.

Sounds more like a rubbing sound to me.

Could it even be as simple as a part of you mudguard rubbing on the tyre?
Or something like that?

If it was me I'd get it on the stand and do a process of elimination.

Take both mudguards off and see if the sound is still there etc..

my thoughts too sounds like mudgaurd rub i would do the above 1st and eliminate it as a potential problem

 

[Deleted member 1258]

Sounds like mudguard to me to, is the wheel slightly out of round or the tyre unevenly seated on the rim? is there a high spot thats rubbing on the mudguard, sounds like its once every revolution.

 

[pawl]

I had a noise that I couldn’t identify When I peddled it occurred not when I free wheeled .Standing on the pedals no sound,To cut along story short it the source was the saddle Sprayed the fixings attaching the seat to the seat pillar Checked fixings were tight Result noise had gone

 

[gasinayr]

If there are rubber "cones " on the wheel spindles. put a drop of oil on them. I had this on my Dawes and it drove me crazy trying to find noise

 

[Big John]

Mudguards are often a nightmare. As everyone else has already said it sounds like a rotational noise which would point to the tyre catching the guard somewhere. Remove the mudguard and see if the noise goes. Check the wheel for trueness and if there's a high spot then use YouTube to show you how to correct it. Getting a high spot out takes a bit of patience so don't rush it. If, however, the noise is still there when the guard is off then swear repeatedly for about 30 seconds and come back on here for more suggestions 👍

 

[glasgowcyclist]

Also check the sides of the tyre for any material that may start flapping while the wheel rotates. I had a similar experience when a strip of the reflective piping on the sidewall of my Marathon+ tyre started peeling off and hitting the stays.

Definitely sounds like mudguard fouling but, rather than bend the stays, I’d take it off completely to see if that eliminates the problem. If not, then I’d be looking carefully at the brake caliper alignment and its mountings being properly secure in case it’s something there that’s moving out of proper alignment once there’s weight on the bike. I would even take the front pads out and take a gentle trundle around a car park to see if that narrowed it down.

That’s just made me wonder, is the noise any different when you brake?

 

[Cycleops]

Sounds like mudguard to me to, is the wheel slightly out of round or the tyre unevenly seated on the rim? is there a high spot thats rubbing on the mudguard, sounds like its once every revolution.

That mudguar stay in the pics is suspiciously close to the tyre. Maybe even remove the guards to check.

 

[raggydoll]

Could also be a little stone or piece of plastic that has flipped up between the mudguard and tyre.

Lots of things to check but I don't think it's anything serious.

That mudguar stay in the pics is suspiciously close to the tyre. Maybe even remove the guards to check.

It really does. When you zoom into the video it does look like the mudguard stay could be rubbing on the tyre.

I would defo take the mudguards off and see if the sound stops.

When they are off, also give them a good clean. They can pick up a lot of dirt and little bits of debris and stones even.

Just shows you, if it is something as simple as the mudguard stay rubbing on the tyre and harry halford would happily charge you for a new bottom bracket!