seat pin collars

For discussions about bikes and equipment.
mig
Posts: 2148
Joined: 19 Oct 2011, 9:39pm

seat pin collars

Postby mig » 27 Jan 2020, 11:30am

mine broke on arrival at work this morning :evil:

never bought one before. what size for a steel frame with 27.2 seatpin?

got to ride the thing home standing up later.

it's fixed gear :lol:

thatsnotmyname
Posts: 329
Joined: 23 Jan 2020, 10:23am

Re: seat pin collars

Postby thatsnotmyname » 27 Jan 2020, 11:46am

Assuming it's a standard collar, then 28.6 is most likely, providing it's not a proprietary size. Knowing what make the frame is would be a big help..

mig
Posts: 2148
Joined: 19 Oct 2011, 9:39pm

Re: seat pin collars

Postby mig » 27 Jan 2020, 11:47am

pompino frame.

thatsnotmyname
Posts: 329
Joined: 23 Jan 2020, 10:23am

Re: seat pin collars

Postby thatsnotmyname » 27 Jan 2020, 11:52am

mig wrote:pompino frame.


If it's a fixed wheel, presumably no rear brake then? I think some of them had an integrated cable hanger, which may or may not be needed.

hamster
Posts: 3314
Joined: 2 Feb 2007, 12:42pm

Re: seat pin collars

Postby hamster » 27 Jan 2020, 11:53am

Try a 28.6, it's just possible it's 29.0

Any shop should have one.

Brucey
Posts: 37242
Joined: 4 Jan 2012, 6:25pm

Re: seat pin collars

Postby Brucey » 27 Jan 2020, 11:58am

there are plenty of TIG welded steel frames that use an externally flared seat tube so that they need a larger collar than you might expect, e.g. around 30mm. [Dunno about a Pompino, but otherwise if it is 27,2mm seat pin with a 28.6mm clip the tube has to be no more than 0.7mm wall, which is too thin to weld to.] IME the 30mm size (if that is the one you need) is not that easy to find.

Suggestion; a couple of jubilee clips around the seat pin might stop it from slipping down, at least for the ride home?

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

mig
Posts: 2148
Joined: 19 Oct 2011, 9:39pm

Re: seat pin collars

Postby mig » 27 Jan 2020, 12:05pm

Brucey wrote:there are plenty of TIG welded steel frames that use an externally flared seat tube so that they need a larger collar than you might expect, e.g. around 30mm. [Dunno about a Pompino, but otherwise if it is 27,2mm seat pin with a 28.6mm clip the tube has to be no more than 0.7mm wall, which is too thin to weld to.] IME the 30mm size (if that is the one you need) is not that easy to find.

Suggestion; a couple of jubilee clips around the seat pin might stop it from slipping down, at least for the ride home?

cheers


got 1.5 million pairs of socks, no jubilee clips. :D

it's an 8 mile cavendish sprint including sharp uphill for me later.

De Sisti
Posts: 788
Joined: 17 Jun 2007, 6:03pm

Re: seat pin collars

Postby De Sisti » 27 Jan 2020, 4:52pm

Brucey wrote:there are plenty of TIG welded steel frames that use an externally flared seat tube so that they need a larger collar than you might expect, e.g. around 30mm. [Dunno about a Pompino, but otherwise if it is 27,2mm seat pin with a 28.6mm clip the tube has to be no more than 0.7mm wall, which is too thin to weld to.] IME the 30mm size (if that is the one you need) is not that easy to find.

Suggestion; a couple of jubilee clips around the seat pin might stop it from slipping down, at least for the ride home?

cheers

I have a Spa Audax frame and its seat collar pin snapped a few weeks ago. It has a 27.2 seat tube
diameter, but I bought a size 31.8 replacement seat pin collar that fit the frame. Tighten to 6nm.
The old one didn't have a measurement on it. I also use a jubilee clip as an added precaution
to stop any slippage.

pwa
Posts: 11611
Joined: 2 Oct 2011, 8:55pm

Re: seat pin collars

Postby pwa » 27 Jan 2020, 5:03pm

Doesn't the old one have any helpful markings?

mig
Posts: 2148
Joined: 19 Oct 2011, 9:39pm

Re: seat pin collars

Postby mig » 27 Jan 2020, 10:28pm

pwa wrote:Doesn't the old one have any helpful markings?


it's annoyingly blank.

just to say that 8 miles whilst standing on the pedals on a fixed bike is a PITA. :evil: :lol:

reohn2
Posts: 37753
Joined: 26 Jun 2009, 8:21pm

Re: seat pin collars

Postby reohn2 » 27 Jan 2020, 10:36pm

FWIW,Salsa make very good strong seat tube collars.
-----------------------------------------------------------
I cycle therefore I am.

Mike Sales
Posts: 4378
Joined: 7 Mar 2009, 3:31pm

Re: seat pin collars

Postby Mike Sales » 27 Jan 2020, 11:08pm

mig wrote:
just to say that 8 miles whilst standing on the pedals on a fixed bike is a PITA. :evil: :lol:


I would have thought that one part spared was that.

mig
Posts: 2148
Joined: 19 Oct 2011, 9:39pm

Re: seat pin collars

Postby mig » 27 Jan 2020, 11:11pm

Mike Sales wrote:
mig wrote:
just to say that 8 miles whilst standing on the pedals on a fixed bike is a PITA. :evil: :lol:


I would have thought that one part spared was that.


ba boom tish!! :D

tim-b
Posts: 1189
Joined: 10 Oct 2009, 8:20am

Re: seat pin collars

Postby tim-b » 28 Jan 2020, 5:42am

Hi
Too late now, but my steel frame has a 31.8mm. I have a collar around the seat post as well for a couple of reasons:
Emergencies like this :)
It marks my saddle height should it need to be removed for any reason
It's somewhere to attach my Carradice Bagman and can be moved around more easily
Regards
tim-b
~~~~¯\(ツ)/¯~~~~

mig
Posts: 2148
Joined: 19 Oct 2011, 9:39pm

Re: seat pin collars

Postby mig » 28 Jan 2020, 9:30am

tim-b wrote:Hi
Too late now, but my steel frame has a 31.8mm. I have a collar around the seat post as well for a couple of reasons:
Emergencies like this :)
It marks my saddle height should it need to be removed for any reason
It's somewhere to attach my Carradice Bagman and can be moved around more easily
Regards
tim-b


what size is the one around the post?