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Hope rear 6 bolt bulb tightenes when clamped up
http://www.retrobike.co.uk/forum/viewtopic.php?f=41&t=375787

Author:  dyna-ti [ Tue Oct 31, 2017 3:11 pm ]
Post subject:  Hope rear 6 bolt bulb tightenes when clamped up

Sold a pair of bulbs to another member who has reported a problem of the hub becoming stiff, with difficulty turning it when fitted in the frame with QR.
Hub(not built wheel)

We've been through a number of possible solutions inc replacing the internals spacer(goes under the freehub) but nothing is reporting as working.

TBH we're both pretty flummoxed by this and hoped one of you has had similar issues.
We're working on the next premise that the axle is worn somehow and when the loading is put on, its loading unevenly, thus we think causing a jamming(well not jamming per say, more hard to turn, though reported as it does, only not as you'd expect.

Our latest idea is to fit a 12mm bolt through axle(which i can send down) but tbh would that work :? might just end up as a dead end, and the member bought as qr, so i would think thats the plan, and being forced another route isnt really fair. Pair of bulbs isnt cheap and i'd rather he was happy.

Author:  Timoth27 [ Tue Oct 31, 2017 4:06 pm ]
Post subject:  Re:

Thanks for this Andy (it’s my hub) I cannot explain the problem other than I think that the shoulder on the axle that the 1 bearings inner race rests against is worn meaning the inner race is forced further inward when tightened up this in turn makes the non drive side end cap contact the outer bearing race on the outer bearing causing it to bind. Hope that makes sense and maybe someone can shed some light on what’s wrong and how to fix it as hub is otherwise in great condition and I want to use it.

Andy supplied it with new bearings but just to rule them out I have put new in but it haven’t helped. I have also emailed hope about this and will update when I have a response.


Thanks

Tim

Author:  Timoth27 [ Tue Oct 31, 2017 5:07 pm ]
Post subject:  Re: Hope rear 6 bolt bulb tightenes when clamped up

dyna-ti wrote:

Our latest idea is to fit a 12mm bolt through axle(which i can send down) but tbh would that work :? might just end up as a dead end, and the member bought as qr, so i would think thats the plan, and being forced another route isnt really fair. Pair of bulbs isnt cheap and i'd rather he was happy.


To be honest Andy the 12mm option would atleast rule out the worn axle and I have been considering this anyway (happy to buy parts from you) as my hecklers rear end is not the stiffest and I don’t really need a qr so I could use a 12-10mm bolt through would be fine. I would really like to know what’s causing this though.

Author:  malt [ Tue Oct 31, 2017 5:31 pm ]
Post subject:  Re: Hope rear 6 bolt bulb tightenes when clamped up

If only to rule it out, does it make a difference with/without the cassette fitted?

Author:  Timoth27 [ Tue Oct 31, 2017 5:54 pm ]
Post subject:  Re: Hope rear 6 bolt bulb tightenes when clamped up

malt wrote:
If only to rule it out, does it make a difference with/without the cassette fitted?


Not actually tried it with cassette fitted so as you say just to rule it out will have a go and report back.

Author:  malt [ Tue Oct 31, 2017 7:51 pm ]
Post subject:  Re: Hope rear 6 bolt bulb tightenes when clamped up

Could you list what you’ve tried so far also. I’ve got a few ideas but it’ll be worth knowing what you done so far.

Author:  Timoth27 [ Tue Oct 31, 2017 9:06 pm ]
Post subject:  Re:

Well I have swapped out Andy’s new bearings with mine and checked the spacers are the right size and fitted the right way around, also tried some end caps from an Xc hub all have the same effect smooth and free on the bench but tight as soon as you clamp it in a frame it tightens up and it sounds like you can hear it is rubbing on the non drive end cap.

Author:  ishaw [ Wed Nov 01, 2017 12:15 am ]
Post subject:  Re:

The answer is probably yes, but are you sure the end caps are correct? I could be very wrong but are the xc end caps supposed to work on the bulb hubs?

Here's a pic or two of my bulb rear for comparison.

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Author:  Timoth27 [ Wed Nov 01, 2017 12:58 am ]
Post subject:  Re:

You are correct ishaw they are different (and my bulb ends are the same as yours) and it meant I had to spread the frame ever so slightly but it had the same effect as soon as you put pressure on it tightens up with what sounds like rubbing on the non drive end cap.

Author:  ishaw [ Wed Nov 01, 2017 8:41 am ]
Post subject:  Re:

If you had to splay the stays, it sounds like the end caps or bearings haven't gone in to the correct depth in the shell.

Author:  Timoth27 [ Wed Nov 01, 2017 9:17 am ]
Post subject:  Re:

Sorry ishaw you miss understand I only had to splay the stays when I tried the xc end caps which are slightly longer.

Author:  ishaw [ Wed Nov 01, 2017 1:47 pm ]
Post subject:  Re: Hope rear 6 bolt bulb tightenes when clamped up

Ah, OK.

Author:  dyna-ti [ Thu Nov 02, 2017 7:25 am ]
Post subject:  Re: Hope rear 6 bolt bulb tightenes when clamped up

The end spacers are for XC/mono/bulb so are all the one size. They sell them as drive side and non drive side @135mm
http://www.hopetech.com/wp-content/uplo ... ploded.pdf
and
http://www.hopetech.com/wp-content/uplo ... ploded.pdf

As you see in the descript' the end spacers list as all fitting on all models. Same part number

Out of interest can you measure them for me ?.

Author:  Timoth27 [ Thu Nov 02, 2017 8:27 am ]
Post subject:  Re:

That’s weird I could have sworn when I was trying them they where different sizes, unfortunately I won’t be able measure anything as I’m away for another 10 days. But I will also try and measure the “135mm” to see if it’s right. Any idea what the tolerance is for the 135mm?

Author:  Timoth27 [ Sat Sep 15, 2018 6:46 pm ]
Post subject:  Re:

So thought I would update this as I have just been in contact with hope. So after exchanging a couple of emails and me sending them some measurements it looks like the axle is way out compared to what they have there so I asked where I could buy a new axle? Bearing I mind I was up front and said it was second hand and the hub is 14 years old. They said give us your address and we will pop one in the post foc.

Once again hope customer service rocks. So will update once I have installed new axle.

Thanks

Tim

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