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Help me diagnose "ping" sound

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Help me diagnose "ping" sound

Old 05-29-09, 06:53 AM
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Rex81
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Help me diagnose "ping" sound

I have an 01 Specialized Rockhopper Pro that hasn't been maintained all that well through it's life. I'm now noticing a pinging sound when pedaling. It doesn't happen in a pattern at all. At first I thought it was my cables hitting the frame, but that's not it. It sounds like its coming from the bottom of the bike, maybe the bottom bracket? Any help would be appreciated. The bike is running fine, its just kind of annoying to listen to it.
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Old 05-29-09, 06:58 AM
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Have you checked for hub axle tightness, as in the wheel doesn't move back and forth n the axle while in place, spokes? just give them a feel. I have a couple of loose spokes that make a sound like bearings moving around while I ride, but I know it isn't the bearings since I just went and got some tri-flow red grease to make sure. Other than those, it could just be bearings.
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Old 05-29-09, 09:45 PM
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Originally Posted by ChanceCoats123 View Post
Have you checked for hub axle tightness, as in the wheel doesn't move back and forth n the axle while in place, spokes? just give them a feel. I have a couple of loose spokes that make a sound like bearings moving around while I ride, but I know it isn't the bearings since I just went and got some tri-flow red grease to make sure. Other than those, it could just be bearings.
he said when pedaling, why would you suggest the wheels??? I'd say try pedaling standing up does it still do it? if not it's the saddle or seatpost.. if it still does it first try tightening the pedals and chainring bolts... then it may be the BB .. also check frame for cracks too.
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Old 05-29-09, 10:16 PM
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He also mentioned that it doesn't happen in any particular pattern which means it is not something that is constantly happening, like bearings in the wheels?
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Old 05-29-09, 10:31 PM
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Originally Posted by ChanceCoats123 View Post
He also mentioned that it doesn't happen in any particular pattern which means it is not something that is constantly happening, like bearings in the wheels?
he also mentioned "when pedaling"
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Old 05-29-09, 10:41 PM
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Could be the spokes rubbing each other where they cross, as the wheel deforms slightly with each revolution.
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Old 05-29-09, 10:42 PM
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Do you have a coil fork?
The spring might be toast.
Seat clamp greased?
Seatpost greased?
Seat clamp bolt greased?
Saddle rails greased?
All of those "ping" noises could be anywhere.
Sounds like to echo all through the frame and make it sound like its coming from somewhere else.
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Old 05-29-09, 11:13 PM
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I'll throw this out there, because it got me once.

Check your shoelaces. Seriously. I had an intermittent ping on my 29'er that just about drove me nuts. Shoelaces were flapping in the breeze and occasionally hitting the downtube when pedaling. That was a "d'oh" moment

-R
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Old 05-29-09, 11:37 PM
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^^^ or if your rear brake cable sticks out and hits the crank when you pedal.
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Old 05-30-09, 05:17 AM
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do you have disks?
EVery now and then around a corner I get a "Ping" front the rotor nicking the pads... almost sounds like one of those bells that people put on their handle bars.
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Old 06-01-09, 05:52 AM
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Thanks guys, I'm heading to the trails tonight, so I'll check all this stuff.

I don't have disks, so I don't need to worry about that...

Its very intermittent, but happens all the time. Like "ping......ping..ping....ping.............ping".

Thanks again, I'll report back.
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Old 06-01-09, 09:25 AM
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I think that all the the rockhoppers made in 01 were built by the Ping golf club company. There is your problem.
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Old 06-01-09, 11:43 AM
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Originally Posted by mtnbiker66 View Post
I think that all the the rockhoppers made in 01 were built by the Ping golf club company. There is your problem.

this my friend is a bad joke.
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