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Sound of unknown origin - From front wheel, as if brakes are rubbing

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Sound of unknown origin - From front wheel, as if brakes are rubbing

Old 08-08-16, 03:42 AM
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Jamie_39
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Sound of unknown origin - From front wheel, as if brakes are rubbing

Hi, I have developed a problem with my front wheel, and I was wondering if any of you have had similar, or could help diagnose it! For the past 3-4 rides, there's a noise coming from my front wheel as if the brakes are rubbing continuously (they're not, that was the first thing I checked) when I am riding. It's present throughout the whole revolution, but maybe increases a little in intensity once/turn.


Factors that can be taken into account:
I just changed out my tyres (old ones were cracked) and noise started 2 rides after the change (one of which was in semi-wet conditions)

There is a very slight rattle when I spin the wheel very slowly as if there's something in the rim, but this noise goes away when I spin it fast, as you'd expect, and in any case it's different to the noise I hear when riding.

If I take the wheel off and hold it by the axle, it spins great, and I don't hear anything. If I put it on the bike, turn the bike vertical and spin the wheel, it spins fine, no rubbing, and, no noise. I only hear the noise when I'm riding, and it increases in frequency with increasing speed.


Any ideas? (It's a Mavic Ksyrium SLR if that makes any difference)
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Old 08-08-16, 05:00 AM
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cny-bikeman 
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Overhaul the hub. It's likely wear or similar that only shows up under load, but there's no point in guessing the specific cause, as the hub is the only moving part. Just open it up, inspect parts for damage and repack with fresh grease and bearings.
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There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
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Old 08-08-16, 05:35 AM
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As a "hub" newbie, do I require any special tools for this? I've got the standard things you would expect in an everyday toolbox, but nothing more specialised. Should I be looking to take it to a shop to do? I've got my 2 biggest rides of the season coming up in 3 days!!!!
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Old 08-08-16, 05:49 AM
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As you probably now realize, unexplained noises should be addressed immediately when possible, certainly before 3-4 rides, and especially well before a big ride. In my haste I did not notice that you have cartridge bearings in that wheelset. A bike shop may or may not have what you need, a bearing/industrial supply business likely would (but you need the info that is written on the bearing itself, not always visible until removed). I would suggest you make a call to some local shops and see if they can help in the time frame you have available. Yes, one can replace the bearings oneself, but I would not suggest that to a relative novice on a $1000 set of wheels with a short deadline. If a shop can't help in time perhaps a riding partner has done the procedure before.

There's no way to predict if you will have a problem on your rides, but I personally would have concerns going on a long ride with such an issue.
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There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!

Last edited by cny-bikeman; 08-08-16 at 06:12 AM.
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Old 08-08-16, 06:06 AM
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Cartridge bearing seem to always give you little noises when they are going bad.
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Old 08-08-16, 06:09 AM
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Jamie 39, I have to ask, is there a broken spoke?

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Old 08-08-16, 06:34 AM
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Hi, again - thanks for all the advice so far! Regarding the noise, I heard it first on Saturday, when I was riding to a race, raced with it (didn't notice the noise during the race, probably ears full of water...), and then took it out again yesterday for a sunday saunter. Shops here are shut on Sunday so today is my first chance to get it looked at!


As you've worked out, I'm a complete novice, but I don't *think* there's a broken spoke. The wheel is pretty true, and all the spokes make the same sound when I hit them. I haven't noticed any pings or anything whilst riding either. If there's a better way to tell, then let me know!!!!


I think I'll try and take the wheel/bike into the shop if I can, but in the meantime, all suggestions are welcome!
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Old 08-09-16, 05:30 AM
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Check your tires for little rubber hairs that are whacking on the brakes.

It sounds stupid, but I've spend way too long chasing down rubbing sounds before only to discover that it was just a new tire with the little dangly things still on.
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