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Old 03-31-09, 06:29 PM   #1
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Loud grinding noise only when turning right?

When I turn right, even just the slightest, such as to move to the right 2 inches, it makes a LOUD (and rather embarassing) grinding noise. Again, only when turning right. Took to local bike store, they said it was the chain rubbing the deraillieur. (I think they said front..) The one guy "repaired" it for free. Took out of store, went 3 blocks, happened again. Second guy "repaired???" it. Made it worse.. said I need a new derailleur, $85 part. OR I can let him try to figure out the problem, since it may not be the derailleur, for $85 an hour. HAHA. YEAH RIGHT. So, any ideas? Please and thanks
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Old 03-31-09, 06:31 PM   #2
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Do you have a threaded steerer? Sounds like the headset is too tight. Too tight of a headset will result in more tightening when turning right.
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Old 03-31-09, 06:32 PM   #3
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It is threadless. And just got a new fork, BB, headset. It sounds like its coming from the drivetrain.
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Old 03-31-09, 07:17 PM   #4
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Maybe you are too close to the curb.

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Old 03-31-09, 07:35 PM   #5
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Does the grinding noise only happen when you are pedaling or anytime you turn right, no matter what?
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Old 03-31-09, 07:52 PM   #6
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Since it only happens when you turn right I'd suspect the headset or maybe the front hub. Since you said that you recently got a new fork and headset, I'd check those parts first before I started messing with the drive train.
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Old 03-31-09, 08:05 PM   #7
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Thing is i feel it in the pedals. and it is very obviously coming from back there. And at the bike store they did say the chain on derailleur. And it happens when both pedalling and not. No matter.
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Old 03-31-09, 08:08 PM   #8
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And at the bike store they did say the chain on derailleur. And it happens when both pedalling and not.
Hard to imagine it being chain and/or derailler if it happens when coasting. Maybe the rear hub/freehub/freewheel?
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Old 03-31-09, 08:15 PM   #9
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Maybe, what will that cost to fix/get replaced?
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Old 03-31-09, 08:19 PM   #10
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What kind of bike? Does it have fenders and/or racks?

Some clues would be nice.
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Old 03-31-09, 08:27 PM   #11
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Specialized mtb, No fenders or racks. It's something with the derailleurs or crankset or cassette i'm 90% sure.
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Old 03-31-09, 08:29 PM   #12
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$85 for a derailleur?

My shop sells a Deore for around $50 +$10 labor to put it on and adjusted.
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Old 03-31-09, 08:31 PM   #13
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Does it make noise only in the small ring, or in all of them?

I had a Specialized Rockhopper 29 last year and the clearance from the front derailleur to the tire was so slight it would occasionally rub even though adjusted correctly. The fix was upgrading to a narrower 9-speed front derailleur and redishing the rear wheel.
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Old 03-31-09, 08:35 PM   #14
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Holding onto the seat-stay or seat-tube, take hold of the rear wheel on the top of the tire. Now push it back & forth. If you can feel the wheel moving back & forth - your rear hub needs to be overhauled and adjusted. While you're at it, do the same with your front wheel - holding onto the stem.
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Old 03-31-09, 08:51 PM   #15
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No, the wheel doesn't move. And yes, all gears.
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Old 03-31-09, 08:52 PM   #16
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Wait, What do you mean by "move"
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Old 03-31-09, 09:08 PM   #17
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Is your bike equipped with disc brakes? if so, you could have an issue with your rotor rubbing on the caliper. Could be caused by loose hub, flexy or cracked frame. If your disk caliper comes close to your spokes, it could be touching as the result of low spoke tension. Good Luck
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Old 04-01-09, 02:48 PM   #18
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Nope, v brakes
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Old 04-01-09, 10:19 PM   #19
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Make sure the cable for the v-brake isn't bunched up or binding somewhere in the line.
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Old 04-02-09, 12:59 PM   #20
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I was thinking that maybe the front derailure cable is too short and pulling on the derailure when you turn the bars. but if it does it when you are coasting too..........
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Old 04-02-09, 01:49 PM   #21
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I would say that over half of diagnosing the problem would come from hearing the actual noise. If we could hear it, I guarantee we'd all say, "Oh!, I know what that is. You have a ..."

Is it a continuous grinding noise for as long as you are in the turn?

Is it a one time grinding noise as you get to a particular part of the turn?

The difference is, the continuous grinding implies the noise is from a rotating part. That it happens both when pedalling and coasting, means it is probably the hubs or rims, as these are the only things moving during a coasting turn.

If it is a single grind that stops before you exit the turn, implies (to me) the headset.

The chain slapping the derailleur cage or frame does not sound like a grinding noise. The chain rubbing the side of the derailleur cage would not happen while coasting.

MY GUESSES -

1. One thing that it could be is a piece of dirt or metal trapped in your brake pad. When you turn right, the rim deflects under the load and may cause the contaminated pad to touch the spinning rim and a grinding sound would result. This is easy to check and correct. The contaminant might be quite small.

2. A rough spot on your hub bearing(s) in a location that only gets used while in a right hand turn could also do it. If so, would further suspect your hub bearing(s) are adjusted too loosely.

The newness of a component means nothing in a world where the consumer is used as the quality control inspector.

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Old 04-02-09, 11:39 PM   #22
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I would say that over half of diagnosing the problem would come from hearing the actual noise. If we could hear it, I guarantee we'd all say, "Oh!, I know what that is. You have a ..."
So very true. There is something lost in translation here on internet forums.
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Old 04-06-09, 09:32 AM   #23
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hahaha, it was the silliest thing. I was getting so fed up with it and figured it out. When i turned right, the rear derailleur shift cable was hitting the tire. Not sure why it now sticks out of the chainstay, but, i just used some electrical tape to hold it. now its fine. thanks everyone.
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Old 04-06-09, 10:51 AM   #24
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hahaha, it was the silliest thing. I was getting so fed up with it and figured it out. When i turned right, the rear derailleur shift cable was hitting the tire. Not sure why it now sticks out of the chainstay, but, i just used some electrical tape to hold it. now its fine. thanks everyone.

?????????

Do you have clamp-on cable guides? If so, they are not properly installed. A tire should never be able to touch a deraileur cable.
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Old 04-06-09, 02:20 PM   #25
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^ Yea, I can't imagine a case where it can and also be installed correctly.
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