Swapping internals in S-A hub?

jobst.brandt@stanfordalumni.org

James Thomson <yosnappyj@hotmail.com> wrote:

>> Looking at the Sturmey Archer pages, I am disappointed to see they
>> never change, apparently because they believe they have the ultimate
>> hubs. The flanges are 2mm thick, a feature that in the aluminum hubs
>> causes large spoke hole deformation and on both steel and aluminum
>> hub (shells) causes spoke failure, the elbows of spokes being designed
>> for 3mm flanges.

> I'm not sure where you found that information, but I have a modern
> (Taiwanese production) X-RF5 aluminium shell here, and the flanges
> are 3mm thick at the spoke holes. 1980s aluminium-shelled 3- and
> 5-speeds also have 3mm flanges. The 1940s and '50s alloy-shelled
> hubs did have thin, fragile flanges.

http://www.sturmey-archer.com/hubs_5spd_S5_A.php

I am sure. The picture is accurate and the S5 shell that I have
measures 2mm. Tom Ritchey did his lathe work to make 3mm flanges of
good strength aluminum and it worked. I was impressed by his ability
to cut double lead threads for the drive side. The S5 I have is from
the 1970's.

Jobst Brandt

James Thomson

<jobst.brandt@stanfordalumni.org> a écrit:

> http://www.sturmey-archer.com/hubs_5spd_S5_A.php

> I am sure. The picture is accurate and the S5 shell that I
> have measures 2mm.

The picture shows a steel-shelled hub.

> The S5 I have is from the 1970's.

and steel-shelled.

I don't dispute that Sturmey's steel-shelled hubs have thin flanges. Their
modern aluminium-shelled hubs, in common with those made in the 1980s, have
3mm flanges:

http://www.sturmey-archer.com/hubs_5spd_XRF5.php

In your previous post you made no distinction.

James Thomson

Ryan Cousineau

In article <4843967f$0$17145$742ec2ed@news.sonic.net>,
jobst.brandt@stanfordalumni.org wrote:

> James Thomson <yosnappyj@hotmail.com> wrote:
>
> >> Looking at the Sturmey Archer pages, I am disappointed to see they
> >> never change, apparently because they believe they have the ultimate
> >> hubs. The flanges are 2mm thick, a feature that in the aluminum hubs
> >> causes large spoke hole deformation and on both steel and aluminum
> >> hub (shells) causes spoke failure, the elbows of spokes being designed
> >> for 3mm flanges.
>
> > I'm not sure where you found that information, but I have a modern
> > (Taiwanese production) X-RF5 aluminium shell here, and the flanges
> > are 3mm thick at the spoke holes. 1980s aluminium-shelled 3- and
> > 5-speeds also have 3mm flanges. The 1940s and '50s alloy-shelled
> > hubs did have thin, fragile flanges.
>
> http://www.sturmey-archer.com/hubs_5spd_S5_A.php
>
> I am sure. The picture is accurate and the S5 shell that I have
> measures 2mm. Tom Ritchey did his lathe work to make 3mm flanges of
> good strength aluminum and it worked. I was impressed by his ability
> to cut double lead threads for the drive side. The S5 I have is from
> the 1970's.
>
> Jobst Brandt

Interesting. The S5 Jobst is linking to looks like a faithful
continuation of the classic S5 design. Conversely, James is referring to
the XRF5:

http://www.sturmey-archer.com/hubs_5spd_XRF5.php

Which is the "new" design which has probably been around quite some time
by now.

For all that, the old design does still appear to be available as a
stock item from some retailers:

<http://www.sjscycles.co.uk/src/froo...duct-Sturmey-Ar
cher-Sturmey-Archer-5-Speed-SPRINTER-S5-Steel-Shell-Rear-Hub-with-Gear-Co
ntrol-HSJ839-36-hole-8035.htm>

So Sturmey is both good and bad! Pick your poison.

--
Ryan Cousineau rcousine@gmail.com http://www.wiredcola.com/
"In other newsgroups, they killfile trolls."
"In rec.bicycles.racing, we coach them."

James Thomson

"Ryan Cousineau" <rcousine@gmail.com> a écrit:

> Interesting. The S5 Jobst is linking to looks like a faithful
> continuation of the classic S5 design.

There's a distinction to be made between the "classic" S5 of the sixties and
early seventies, and that modern hub, which is very similar to the Sprinter
5. The old S5 (referred to by Andrew above in the thread) used two control
cables, with a toggle chain on the right and a bell crank on the left:

http://www.sturmey-archerheritage.com/detail.php?id=104

The modern S5 and XRF5 are identical apart from the shell.

> For all that, the old design does still appear to be available
> as a stock item from some retailers:

One reason for that is that the big aluminium flanges of the XRF5 cause
clearance problems with the stays of some folding bikes.

James Thomson