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Rear wheel pulling out of dropouts

by Jack Osbourne snr
Thu, Jan 16, 2014 20:34
37

Dear Learned Friends,

Any sage advice welcome to help solve an annoying issue...

On and off, for about two years, I have found myself pulling my back wheel out of the dropouts when climbing out of the saddle. I'm getting very fed up having to stop and reset my wheel on hills.

Wheel pulls out of drive side dropout and wedges on non drive seatstay
Frame and dropouts are titanium
Wheels are Prolite Bracciano

I've tried a few things, but nothing seems to work consistently:

Changed stock open cam skewers to closed cam levers.
Added serrated washer to drive side
Experimented with monster clamping force and different lever positions

Any ideas how to stop this? Would roughing up the dropout surfaces help? If so what with and by how much?

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

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37 comments

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Flying Scot | 11 years ago
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This sounds like a classic case of the axle not being centred in the hub - which means that the quick release is binding down hard on the end of the axle rather than on the drop out. Count the number of axle threads protruding from the drop out - they should be equal.

...Only thing is, these aren't cup and cone hubs are they?

So can you actually re-centre the axle, IIRC, the non drive side just taps in with a fixed cone and you adjust the drive side.

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Jack Osbourne snr replied to Flying Scot | 11 years ago
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Flying Scot wrote:

This sounds like a classic case of the axle not being centred in the hub - which means that the quick release is binding down hard on the end of the axle rather than on the drop out. Count the number of axle threads protruding from the drop out - they should be equal.

...Only thing is, these aren't cup and cone hubs are they?

So can you actually re-centre the axle, IIRC, the non drive side just taps in with a fixed cone and you adjust the drive side.

If only it was. I ruled this out at the roadside the first time this happened.

This isn't the issue as there is about 2mm between the outside edge of the axle and the outside of the dropout with the QR out. Both sides appear equal and the gap drops equally under compression from the QR. At no point is the end of the axle any closer than 1mm to the
Inside faces of the QR.

Prolite Bracciano wheels have cartridge bearing hubs, so no adjustment as with cup n cone.

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jason.timothy.jones | 11 years ago
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looks deep enough, but it is a bit rounded to the front, but I cant imagine that would be the problem if the QR is tight enough

im stumped

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Jack Osbourne snr | 11 years ago
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Let's imagine that I can lay down the power, if not for long! I'm more Jan Ulrich than Marco Pantani when it comes to climbing style...but only style.

I haven't tried another wheel, no. That would have been the obvious thing to do 40

Not the best of pics...

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allez neg | 11 years ago
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Have you replicated the problem with a different wheel?

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jason.timothy.jones | 11 years ago
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can you take a photo of the drive side dropout and post here?

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allez neg | 11 years ago
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Pass.

(Other than saying get thee to a frame builder so they can check alignment of the frame/dropouts and hub width)

Do you have legs that make Rob Forstermann look like Charles Hawtrey?

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