UN55 Left cup - same as un54?

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rich100
Posts: 105
Joined: 24 Oct 2011, 12:24pm

UN55 Left cup - same as un54?

Postby rich100 » 24 Sep 2012, 7:27pm

I need a left cup for a un55 (alloy), is it the same fit as the plastic un54 one? and does anyone know where I can buy a spare?

Thanks

Brucey
Posts: 36763
Joined: 4 Jan 2012, 6:25pm

Re: UN55 Left cup - same as un54?

Postby Brucey » 24 Sep 2012, 8:05pm

upgrade UN54 cup in aluminium here;

http://www.sjscycles.co.uk/problem-solvers-up-cup-54-68mm-prod22790/

if no-one here knows, maybe they could advise you?

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

reohn2
Posts: 37457
Joined: 26 Jun 2009, 8:21pm

Re: UN55 Left cup - same as un54?

Postby reohn2 » 24 Sep 2012, 8:20pm

Brucey wrote:upgrade UN54 cup in aluminium here;

http://www.sjscycles.co.uk/problem-solvers-up-cup-54-68mm-prod22790/

if no-one here knows, maybe they could advise you?

cheers

EEK! I can get a new BB for less than that!
I'm 99% sure they're all the same.
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I cycle therefore I am.

Brucey
Posts: 36763
Joined: 4 Jan 2012, 6:25pm

Re: UN55 Left cup - same as un54?

Postby Brucey » 24 Sep 2012, 8:31pm

I've just had a look through my collection of spares and I get

UN71 30.00mm
UN52 30.00mm
UN72 30.00mm
LP27 30.00mm
UN25 30.50mm
UN5x 30.00mm (plastic LH cup, integrated RH cup, label missing)

didn't check the lengths BTW but in theory they shouldn't differ very much.

So with one exception I agree with R2, but I'm not 100% sure I measured a UN54 or UN55 in fact.

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

WrightsW5
Posts: 798
Joined: 1 Jun 2010, 10:37pm
Location: Saddle City

Re: UN55 Left cup - same as un54?

Postby WrightsW5 » 24 Sep 2012, 10:14pm

The way they are machined is the main thing, if the design is slightly different you may find it coming loose miles from home.

The Mechanic
Posts: 1922
Joined: 23 Jul 2010, 1:38pm
Location: Scotland

Re: UN55 Left cup - same as un54?

Postby The Mechanic » 25 Sep 2012, 8:39am

UN55 BB is only 16.95 at CRC incl. postage. What is the point of buying a left cup for that price plus postage.
Cancer changes your outlook on life. Change yours before it changes you.

rich100
Posts: 105
Joined: 24 Oct 2011, 12:24pm

Re: UN55 Left cup - same as un54?

Postby rich100 » 25 Sep 2012, 10:05pm

OK thanks, I saw those 'upgrade' cups, and came to same conclusion re the price.. seems a waste to buy a whole bb just for a cup but have ordered one anyway.