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Tiny bit of rotation between center lock disc and hub is it ok?

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Tiny bit of rotation between center lock disc and hub is it ok?

Old 08-02-20, 10:54 AM
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fooferdoggie
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Tiny bit of rotation between center lock disc and hub is it ok?

the hub is a Shimano deore and I have a center lock 203 mm dic mounted to it. I don't have a cassette tool handy to check wifi ti s tight enough but the disc seems pretty tightly mounted. but I have a little bit of rotation between the hub and disc. If I hold the lever down I can rotate the wheel just a tiny bit back and forth. I think this has been going on for a long time but I just now found what was going on. I don't want things to fail going downhill on the tandem. the hub has no play in it its self. the bike only has 1200 miles on it.
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Old 08-02-20, 11:10 AM
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I got a bike with a centerlock hub and a 6 bolt to centerlock adapter.
One sold by QBP which actually has a way to tighten it around the hub splines..

I cannot see an image of your issue to judge. take it apart and see if the splines are worn ?

Ask /show your friendly local bike shop..

Headset bearing adjusted a bit loose could also do this ..





...

Last edited by fietsbob; 08-02-20 at 11:15 AM.
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Old 08-02-20, 01:52 PM
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Sometimes a small amount of movement can be felt due to the brake pads
shifting a slight amount inside the hydro brake calipers when grabbing the
brake lever and moving the bike back and forth, especially noticeable in the
front wheel. It can feel like a slightly loose headset or something loose.
Usually the play due to pad movement in the caliper is not harmful or dangerous.
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Old 08-02-20, 03:04 PM
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That movement is more likely to be the pads shifting back in forth in the caliper. It's completely normal and not a reason for concern.
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Old 08-02-20, 04:21 PM
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Originally Posted by dsaul View Post
That movement is more likely to be the pads shifting back in forth in the caliper. It's completely normal and not a reason for concern.
OP states the movement is between the "hub and disc," which is not normal and means that the rotor needs to be clamped down. They do loosen up with time. OP, you need a BB tool, or at least take your wheel in to a shop that has one. They should do it on-the-spot and for no charge or a nominal charge.
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Old 08-02-20, 04:36 PM
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Yes the rotor is not moving. but the nIhad a chance a better search found it is a common thing but I need to grab my tool so I can check the tightness too but the rotor seems pretty tight it takes a fair amount of force to move it. Centerlock rotor 'slop'
till I really checked it out I thought twas the headset loose.

Last edited by fooferdoggie; 08-02-20 at 04:44 PM.
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Old 08-02-20, 08:49 PM
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Now I have no idea what on earth you are describing. If it is "rotation between the hub and disc," how is it that the "rotor is not moving"?
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Old 08-02-20, 09:11 PM
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Originally Posted by Koyote View Post
Now I have no idea what on earth you are describing. If it is "rotation between the hub and disc," how is it that the "rotor is not moving"?
Ya what I meant was if the roar was locked I could rotate the wheel maybe 1/4" it seems it can happen from my google search.
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Old 08-02-20, 09:25 PM
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OK if all this is true, what do you propose to do about it ?
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Old 08-02-20, 10:25 PM
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One makes sure all the areas of slop are tight and not a growing issue. Some, like pads in caliper or stanchions in legs are always a tad sloppy, Others like headsets and hubs/rotor mounts can be addressed. Andy
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Old 08-03-20, 03:17 AM
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Itís really not a functional problem.
If you want to be able to install and remove the rotor w/o the use of pullers and presses, a bit of play in the fit is near enough unavoidable. Itíd take a lot of torque to hold it in place by friction only. While riding, the rotor would simply turn until it comes up against a hard stop and then stay there.
The movement youíre seeing only happens when you lock the brake while stationary, and rock the bike back & forth.
... or perhaps during advanced trick riding...
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