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Old 04-29-07, 08:27 AM   #1
AMPandCAMELBAK
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freewheel clicking volume oscillates while coasting

Whatup, y'all: I've got Bontrager RaceXLite's on my mountain bike and have a weird clicking sound from the free wheel. The normal ratcheting sound from spinning the rear wheel isn't at constant volume as you would expect. I know some hubs click louder than others as many forums have discussed. But mine actually oscillates in volume from louder to quiet and then repeats back and forth. The faster I spin it, the faster the loud/quiet cycles. One rotation of the wheel equates to one loud/quiet cycle. This is definitely emanating from the freewheel (or freehub?) since I can remove the wheel from the bike and it does the same thing. Can anybody tell me what's going on? Has anyone come across this problem before? Do I have a major problem here? Thanks in advance for your input.
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Old 04-29-07, 10:22 AM   #2
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This is actually quite common, and is not itself a problem, but if you notice any skipping or slipping in the drivetrain, you should probably get a new freehub. Hope this helps..
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Old 04-29-07, 02:21 PM   #3
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DON'T SPEND A DIME on the freewheel YET!!! I had the same problem last year when I pulled my bike off the trainer and it was caused by a barely noticible, slightly bent rear skewer (I normally used a different skewer for the trainer but didn't last year). Anyway ... take a look at the rear wheel hub while off the bike and spinning the wheel. You should notice a very slight wobble between the wheel and the rear cogs. If not, remove the skewer and check it very carefully for non-conformity. Let me know how it turns out for you.
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Old 04-29-07, 07:08 PM   #4
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It's typicall, and common.
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Old 04-29-07, 07:17 PM   #5
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If I'm not badly mistaken those hubs are made by DT Swiss and the sound it a hallmark of the brand. Someone correct me if I'm wrong.
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Old 04-29-07, 09:38 PM   #6
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I have the same issue with my Bontrager Race Lite wheels. I've noticed when turning the wheel on the maintenance stand the at the cassette assembly will want to try and turn. I thought it was possibly a lubrication issue, but the slightly bent skewer sounds like a possibility......I'll have to check mine out. Funny how it doesn't do it all the time, just occasionally, and then I've noticed if I pedal while, it goes away, but will come back agan.....

Don
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Old 05-01-07, 09:37 PM   #7
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Thanks for your input everyone. Just in case it isn't just something "typical and common", I checked out the bent skewer hypothesis this evening and found it to be straight as can be. I aligned the skewer with a machined straightedge and spun it carefully to find no imperfection. I also checked for any wobble of the cassette; that, too, appears to be sound. But thanks for the ideas, 55-11.

Tmax1, I believe there are DTSwiss-made Bontragers, but not all of their hubs. I have the link with this info, but left it at work. I can post it tomorrow.

Now what about this...I remounted the rear wheel and set the chain on the highest gear (smallest cog). I lifted the bike by its saddle and cranked on the pedals to get the rear wheel spinning at high speed. The loud/quiet cycle of the ratcheting volume still remains. However, I noticed something else that wasn't apparent at slower wheel speeds or while I was coasting on the bike...there seems to be a slight weight imbalance of the wheel or tire that causes a slight up and down wobble of the bike. Again, I don't feel this when I'm riding it. The rear tire is tubeless and all I've done to it since the bike arrived in the box last week was pump it up. The wheel is true and, by sight, the tire is properly mounted (I don't see it wobble as I spin the rear wheel).

Does this help our investigation at all? Again, I appreciate everyone's input. Any news with your Race Lite's, CaptDon?
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Old 05-01-07, 10:19 PM   #8
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Check that the tire is seated properly around the entire rim. This will be immediately noticeable if it's not.
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Old 05-01-07, 11:41 PM   #9
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Could be inconsistent grease coverage on the ratchet mechanism in the freehub.
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Old 08-14-16, 03:03 PM   #10
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Hello to all
I know this a really old topic, but I have the same problem.
You who had this problem, how did you solved it?
Thank you all
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Old 08-14-16, 04:43 PM   #11
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Try dripping some light oil like triflo into the freehub /freewheel and see if that makes any different.
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Old 08-14-16, 09:15 PM   #12
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Quote:
Originally Posted by staypuff View Post
Hello to all
I know this a really old topic, but I have the same problem.
You who had this problem, how did you solved it?
Thank you all
It's not really a mechanical problem at all, just one of attitude.
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Old 08-16-16, 02:32 PM   #13
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Thank you for your help
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Old 08-17-16, 08:14 AM   #14
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The weight imbalance is intrinsic to the valve and rim join area. Normally they are at 180D apart and balance out
but not always. Also a clip on weight (eg reflector or computer magnet) can cause an imbalance and hop while the
bike wheel is rotated. I put a wheel spoke mount reflector on an nite ride bike once and noted a distinct up/down
oscillation of the rear wheel at speeds of 25-30 mph that was alarming at first but not noted after I realized what
it was and stopped noting it. OTOH it might be dicey above say 40mph, but I don't do that at night and have to
go pretty far out to find the 40 mph hills. You could let the wheel passively rotate and find the heavy part and
move the tire around or put a clamp on speedo magnet on the opposite side at different distances to reduce the
hop. If the valve stem is long enough and threaded on the outside some extra stem nuts might do if the stem
was on the light side of the wheel.
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