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C.dale Road Tandem 2 - odd/weird noise

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C.dale Road Tandem 2 - odd/weird noise

Old 09-15-17, 01:32 AM
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C.dale Road Tandem 2 - odd/weird noise

I have a c.dale Road Tandem 2. it has disc brakes on it - BB7/200/200 F/B. for some odd reason, there's this high pitch rubber sound-alike noise that comes when I pedal - the noise appears to come from the stoker/back wheel end and is consistent as opposed to a few times per oscilation. it goes away when I cruise the bike without pedaling. I was guessing it could be rotor rub at the back but that would sound somewhat metallic. its not your typical metallic sounding sqeak or tick or creak which i'm having.

Kinda loss what it could be at the moment. I've done some diagnostics and as i mentioned earlier the sound only comes when I pedal, regardless whether my crank/drive train engages the wheel hub or not. Any idea what could be causing this ?
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Old 09-15-17, 06:46 AM
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Does that bike have the DT rear hub? If so I remember a thread a while back talking about a hard to diagnose sound coming from the hub. Some periodic maintenance was all that was needed if memory serves me right.
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Old 09-15-17, 09:27 AM
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Of no help here, but I had a noise problem with my '01 RT1000 shortly after I got it. It was quite intermittent, not related to pedaling or wheel revolutions. Finally, I just happened to glance in my mirror when the noise kicked in, seeing my 9 year old daughter's head bouncing in and out of view as she had fun on the suspension seat post...
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Old 09-15-17, 02:46 PM
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Loopless,

Funny, we had the same problem with our Cannondale T2 we bought in 2015. It ended up being a bad rear derailleur. It took a while (and some frustrating miles) to figure out but we had the 105 replaced with an Ultegra derailleur for an upcharge and haven't heard the sound since. This was after greasing the original pulleys, lubing every last moving part and tightening the bottom brackets. If you have tried those things just replace the derailleur and hopefully that will fix it.
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Old 09-15-17, 05:14 PM
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I have two C-dale noise stories. One was the front hub. I am pretty convinced, though not absolutely certain, that it was vinyl-on-vinyl sound, like tight-fitting bearing seals. It would go away sometimes, or maybe if I shot some teflon spray in there. After many months I started ignoring it, and it went away. Same thing with the rear crank bearing. Since these were squeeky vinyl seal kinds of sounds I was not too concerned, convincing myself that it was only very negligible loss due to friction. I was confident they were not the actual bearings.
Regarding deraileurs- One thing about the 105 deraileurs that come stock is that the pulleys are journal bearings; i.e. friction fittings and not sealed bearings; i.e., with actual ball bearings. You can replace with Dura Ace pulleys for a nice upgrade.
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Old 09-15-17, 08:45 PM
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Check seat posts, be sure they are greased and properly torqued. We had same symptoms on our Burley back when. Reinstallation of seat posts fixed it.

Also, it could be one of the four pedals. Noises are sometimes hard to located.
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Old 09-16-17, 05:21 AM
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Just spitballing,

Pedals are notorious noise machines. On a flat stretch try combinations of 2 and 3 feet on all 4 pedals and see if it has an impact.

You said the sound was high pitched. Does the pitch vary with bike speed or pedal cadence? If the former it is likely in the wheel/hub. If the latter, likely the drive train.

Does the bike have a conventional timing chain or gates belt? I have heard noise from an overly tight timing belt.

Check for a loose bearings/hub. If the wheel is floating on the axle pedaling force could pull the wheel out of alignment.

Check for constant contact of your teams shoes with the crank arms pointing to a mis-adjusted cleat.

Finally, look for anything rubbing the drivetrain. Cables, accessories, chain guards.
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Old 09-17-17, 08:45 PM
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Guys, good morning and thank you all for the input.

Do I dropped by my LBS after doing a 80km which by then the sound audible all the way - back pedal, front pedal etc. The mech dropped the wheel, and whoala, once hearing the sound he knew what it was. Turns out it was the back wheel hub with gaskets that had gone dry. the hub was greased and oiled and now the unit is as silent as ever. lesson learnt for me as well - rubber sqealing that's non-metallic sounding in nature : possibly wheel free hub needs lubing. cheers.

this was driving me nuts and I'm glad that its all resolved now.

to answer the gent above - yes, DT Swiss 540 rear hub.
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Old 09-18-17, 12:57 PM
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Originally Posted by loopless
Guys, good morning and thank you all for the input.

Do I dropped by my LBS after doing a 80km which by then the sound audible all the way - back pedal, front pedal etc. The mech dropped the wheel, and whoala, once hearing the sound he knew what it was. Turns out it was the back wheel hub with gaskets that had gone dry. the hub was greased and oiled and now the unit is as silent as ever. lesson learnt for me as well - rubber sqealing that's non-metallic sounding in nature : possibly wheel free hub needs lubing. cheers.

this was driving me nuts and I'm glad that its all resolved now.

to answer the gent above - yes, DT Swiss 540 rear hub.
Glad to hear all's good now. Enjoy your riding!
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