|Help! Noisy Front Wheel||wolfereeno|
Jan 13, 2003 8:52 PM
|I've been trying to find a buzzing sound, noticable when going over bumps or rough roads, on my front end. I thought it was cables, the plastic shift tabs on my Ultegras, etc. But I've isolated it to the front wheel which is a Mavic Cosmo. When I take off the wheel and bounce it or even whack it on the side with my hand, there's a buzzing vibration. The spokes seem tight. The wheel's totally true. I've got about 1000 miles on it. Any suggestions?|
|Could be valve stem rattling||spookyload|
Jan 13, 2003 8:54 PM
|I had this problem with my Ksyriums becuse the tubes didn't have threads to tighten the valve stem down.|
|The stems are threaded and the lock nut is tight. (nm)||wolfereeno|
Jan 14, 2003 11:57 AM
|re: Help! Noisy Front Wheel||JimP|
Jan 14, 2003 6:08 AM
|You might try to wrap a layer of black electrical tape around the valvestem before you insert it into the rim to act as a damper between the stem and the rim. I have done this to reduce a clicking caused when the valvestem touches the carbon rim on my Nimble Crosswinds.
Jan 14, 2003 7:16 AM
|One of the dust caps on my Ksyriums got a little loose and buzzed. I just pushed it in with my fingers and it went away.
|What/where are the dust caps? (nm)||wolfereeno|
Jan 14, 2003 11:55 AM
|The stem is threaded and the nut is tight against the rim. And the valve cap is on tight of course. (is that what you called dust caps?)
I will try wrapping some tape around the base of the stem.
Jan 14, 2003 1:17 PM
|Maybe the Cosmic hubs are different than the K's. Just a thought.
|small piece of stone in the rim ?||PeterRider|
Jan 14, 2003 1:51 PM
|... that could have entered through the valve hole ? |
|lost spoke nipple in the rim ? [nm]||Leroy|
Jan 14, 2003 3:28 PM
|update: took tire and rim tape off for a looksee||wolfereeno|
Jan 14, 2003 7:39 PM
|With the tire and tape off, not just some of the spokes buzz, they ALL seem to do it.
The sound seems to be coming from the small aluminum thimble like thing that sits in the rim's hole and is used to anchor the spoke to the rim. I tried tightening each spoke about 1/2 turn but the problem is still the same. Should I try tightening even more? The spokes didn't feel loosely tension wise when I started.
If it was something other than a bike wheel, say some trim on a car, I'd use silicon calk, teflon tape, etc to dampen the sound. But I'd like to keep my wheels light and would rather trade them for something else than take a chance ruining them.
First I'll try using some sticky cloth rim tape. Maybe that will help. The thin plastic factory rim tape had no adhesive at all. Just a tiny bit at the seam.
I hate this vibration, buzzy feeling. I really can notice it when I ride since the bike is otherwise so dampened (frame's a carbon kestrel 200sci).
I'm thinking about ditching these wheels if I can't fix this. Thanks for your suggestions.
|all this sounds like too much trouble||Leroy|
Jan 15, 2003 5:09 AM
|You're bound to be able to find some wheels that don't buzz!|
|starting to think along the same line||wolfereeno|
Jan 15, 2003 8:28 AM
|I'm thinking about SpeedDream or America Classic wheels. Something under $500.|
|It might be cracked, sounds like a weak spot nm||Paul|
Jan 15, 2003 5:37 AM
|re: Help! Noisy Front Wheel||JimP|
Jan 15, 2003 7:04 AM
|Ah, that's the problem with all those spokes ( in a W.C.Fields voice). Any spokes more than 3 can cause problems - all carbon fibre wheels only make wooshing noises in the wind.
|So what 3 spoke wheels to you ride ? :-) (mn)||wolfereeno|
Jan 15, 2003 8:30 AM
|So what 3 spoke wheels to you ride ? :-) (mn)||JimP|
Jan 15, 2003 11:31 AM
|I ride the Nimble Crosswinds - 1550 gm for the set. I have ridden them for over 10k miles in 4 years with no problems. They are very stiff - both laterally and in compression. You can tell the difference between them and a titainium spoked front wheel. They are very aerodynamic even though they aren't the deepest rim. Since they are lighter than most of the popular wheelsets with a rim weight about 325gms and since I ride on tubular tires, they feel lighter.
|A little expensive for me though||wolfereeno|
Jan 15, 2003 3:11 PM
|They look nice but I'd rather ride uncool spokes than to shell out $1400 for wheels. I'm thinking more along the lines of american classic or custom wheels under $500.|
|Not that bad||JimP|
Jan 16, 2003 5:32 AM
|At the risk of sounding very snobish - Since my two girls are educated and married I do have more disposable income than I did a few years ago. This may very well be the last bike and wheels I buy so I decided to buy what I wanted. Now, my wife has had some comments about my purchases like "Should we get a special rider on our insurance for your bike?" Actually, the wheels are 4 years old now so the amortization of the high entry price is working well since I read about different folks buying wheels yearly or so and the maintenance issues on them. Before the Nimbles, I had a custom build of Sun Mistral M14 rims on Phil Wood hubs that were great for a couple of years before the spokes started to break. I had the wheels re-spoked a couple of times and then got tired of having to do that every other year. I still have that front wheel about 15 years old with over 25k miles on it radial laced with titanium spokes and it still is lighter and faster than most new wheels - just not very sexy looking.
|Angry Bee Wheel !!!!||MR_GRUMPY|
Jan 15, 2003 1:55 PM
|Try taking the wheel off the bike and putting tape over different parts of the wheel. Bounce it to see if buzzes. Keep on trying until you find the spot. (Try the plastic dust shields on the bearings)
If nothing works, I think you have an angry bee wheel. Killer bees have infested your wheel, and protest whenever you ride or bounce it. Beware !!!!!!!!
|Update: Help! Noisy Front Wheel||wolfereeno|
Jan 15, 2003 10:47 PM
|OK, I looked over the wheel with the tire and rim tape off really carefully. The noise appears to be coming from the seam joint of the rim. I isolated the noise to be near two spokes and the seam is right between them. The two spokes are tight. So maybe there's some sort of fitting that forms part of the joint that's loose - or its just a bad weld. Anyway, I think I've got no choice but to replace the wheel. Then in the meantime if I'm lucky maybe I can get it fixed on warranty and keep as a spare.
As far as new wheels, I think I'll look for anything not Mavic. I'm thinking about a pair of American Classic or Speed dream's right now. Want to spend under $500 for the pair. Way under if possible if I buy something used.
|Noise at rim joint||KeeponTrekkin|
Jan 16, 2003 10:37 AM
|It sounds like that joint is the source of your noise when the wheel vibrates like a big round tuning fork with spokes. I don't remember the context, but I believe Jobst Brandt says, in his book "The Bicycle Wheel", that spoke tension will keep the rim together at the joint. If the joint is designed to not be welded, it might be OK but noisy.
|Noise at rim joint||wolfereeno|
Jan 16, 2003 12:06 PM
|Yeah, it resonates like a tuning fork. I think it's welded. Maybe it's defective. The back wheel is quiet.
At this point I'm trying to decide if I want to replace it with a new front wheel or just upgrade to a better set of wheels.
|Noise at rim joint||Chen2|
Jan 16, 2003 3:05 PM
|This sounds like the same problem that many people have had with the MAVIC Open Pros, a piece of metal that is used to align the joint during the welding process. There have been many threads and posts about the problem with the OP wheels. The standard fix is to get some super glue or other bonding agent inside the rim to keep that piece of metal from moving around. Maybe you could contact MAVIC and get their advice. I think they may have solved the problem with the OP's.|
|How could I get glue to the right place?||wolfereeno|
Jan 16, 2003 4:17 PM
|Any idea how to get the glue in there? The joint is halfway between two spokes.
I could drill a hole perhaps. Otherwise I'd have to take the two spokes off and then snake a tube in there. And I'd have to be careful not to put much glue so I don't throw off the balance of the wheel.
I think the wheel is shot (or is it shit?!)
|what about rebuilding with a new rim ?||PeterRider|
Jan 17, 2003 12:06 AM
|... or if you throw the wheel away, send me the hub ! :-) |
|what about rebuilding with a new rim ?||wolfereeno|
Jan 17, 2003 10:28 AM
|A cosmo front wheel is $140 new. If I can't get any satisfaction from Mavic or the store that built my bike, then maybe just for fun, I'll try rebuilding it myself.
But I'm going to replace them with something nice.
|what about rebuilding with a new rim ?||PeterRider|
Jan 17, 2003 5:58 PM
|if you rebuild: |
- if you choose the rim carefully, or use the same, you can reuse the spokes (not recommended, but if you used the first wheel only 1000 miles, I would do it).
- price will be quite low. Typically between 30 and 60$
- you will spend time doing it, do it carefully, and in the end typically have a good wheel, probably even better than what a shop would sell you.
Not trying to sell my stuff, but if you have any interest I have a set of CXP-33/chorus front and DA rear. 32h, laced 3x rear/2x front with DT14/15. I laced them and rode them 200 miles to test. They stayed true, are more comfortable than any wheel I've tried before, and CXP33 rims have the reputation of being bombproof. They make no noise, and I ask much less than 500$ (not even half) :-)