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PostPosted: Sun Dec 04, 2016 5:32 pm 
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Joined: Fri Jul 15, 2016 8:13 pm
Posts: 42
Hi,
I've got a specialized allez sport 2013 which needs new headset bearings. It's an intergrated bearing threadless headset with a 1 1/8 inch steered. Don't really know which bearings I can get but someone told me that there are cups inside you need to knock out before you can put decent bearings in?
Thanks,


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Posted: Sun Dec 04, 2016 5:32 pm 


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PostPosted: Mon Dec 05, 2016 2:27 pm 
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Joined: Sun Sep 29, 2013 4:34 pm
Posts: 71
You may have an "integrated" headset which has steel cups pressed quite deep into the head tube, these form the bearing race for steel balls in a metal holder. It mimics what most folk would recognise as a traditional external headset, except it's hidden inside the head tube.

IF you have the above, then it's possible to drift the steel "cups" out, as you would with a more traditional headset. It's awkward, to say the least…. However, once they are out, you'll see that the frame is ready to accept a proper integrated headset, there are bearing seats for the upper and lower bearings already formed in the head tube.

Normally it's then possible to fit an 1 1/8, 36/45, Cane Creek or similar headset. The whole new headset should be used, including the crown race. It could also be an 1 1/8, 45/45, Campag headset fit….. One measurement is worth a thousand forum posts…..

If you are in the UK, then the steel inserts could well be seizing into the aluminium head tube, and it's a pig of a job to get them out, so be sure/confident of what you are doing when drifting them. It's useful to have a helper, or something to support the front of the frame…..


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PostPosted: Mon Dec 05, 2016 8:31 pm 
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Joined: Wed Jan 10, 2007 10:56 pm
Posts: 1386
Location: Canada
They are cartridge bearings. See below.

Image


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PostPosted: Mon Dec 05, 2016 11:40 pm 
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Joined: Fri Jul 15, 2016 8:13 pm
Posts: 42
goodboyr wrote:
They are cartridge bearings. See below.

Image

Yep, seen that before but have no idea where to get them! Any ideas?


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PostPosted: Tue Dec 06, 2016 12:40 am 
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Joined: Wed Jan 10, 2007 10:56 pm
Posts: 1386
Location: Canada
Bog standard 36 x 45 1 1/8" cane creek style bearing.

http://www.chainreactioncycles.com/ca/en/fsa-bearing-th-873e-acb/rp-prod134043


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PostPosted: Tue Dec 06, 2016 10:15 am 
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Joined: Sun Sep 29, 2013 4:34 pm
Posts: 71
If I'm reading the spec line correctly, it suggests a 41.8mm diameter, 45/45 deg bearing in both upper and lower. That is the Campag dimension.

It's generally easier, and pretty much the same price wise, to buy a complete headset and just use the bearings from it.

I would expect a lot of bike shops to have stock of the headsets, but maybe not know what you're on about if you ask for a bearing by dimension.


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PostPosted: Tue Dec 06, 2016 12:07 pm 
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Joined: Sat Jul 29, 2006 2:36 am
Posts: 1353
Location: UK
goodboyr wrote:
Bog standard 36 x 45 1 1/8" cane creek style bearing.

http://www.chainreactioncycles.com/ca/en/fsa-bearing-th-873e-acb/rp-prod134043


That bearing is 41.0mm dia and 6.5mm thick and not the correct one.

androidavies is correct. The OD is 41.8mm and the thickness is 8.0mm according to that chart.

A TH Industries TH-870 will fit (1-1/8" 45deg x 45 deg Campag compatible). FSA sell them under their own name and Ritchey do a Campag compatible as well.


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PostPosted: Tue Dec 06, 2016 12:38 pm 
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Joined: Wed Jan 10, 2007 10:56 pm
Posts: 1386
Location: Canada
Cane Creek headset finder for this bike says IS 41 which is what I said....weird.

https://www.canecreek.com/headset-fit-finder



Sent from my SM-G900W8 using Tapatalk

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Posted: Tue Dec 06, 2016 12:38 pm 


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