Fscking Brompton!

Colin Blackburn said:

In the short term I can put on the original rea wheel
which has an SRAM 3-speed (though I'd have to find a
changer) but cycling in Durham would probably become less
pleasant.

Colin

Join the BromptonTalk newsgroup on Yahoo and you'll find
people there who can tell you exactly what the problem is
and how to get it fixed.

Tony

Colin Blackburn said:

In the short term I can put on the original rea wheel
which has an SRAM=

=20

Quoted message said:

3-speed (though I'd have to find a changer) but cycling in
Durham would=

=20

Quoted message said:

probably become less pleasant.

Note that you can retrofit the 6 speed conversion kit to any
Mk3 that=20 was supplied with the SRAM hub: all the braze-
ons etc. should be there.=20 IIRC it's ~=A370.

I did have a go on a 6, and it works just fine, but having
used the 3=20 with no problems was wary that I knew I didn't
*need* it, not generally=20 a consideration I'll grant you
but on a runabout/hack it is. But OTOH=20 my L3 has the -18%
gear reduction (I can't remember if that's done at=20
sprocket, crank or both, Brompton will be able to tell you
I'd think)=20 which does make a *big* difference. Dundee has
some Real Hills, and=20 having ridden a standard geared Mk 2
for a while I have practical=20 experience of the
significance of the change. You spin out down hills,=20
granted, but if I'm you're in a Big Hurry down hills you're
on the wrong =

bike anyway!

Pete. --=20 Peter Clinch University of Dundee Tel 44 1382
660111 ext. 33637 Medical Physics, Ninewells Hospital Fax 44
1382 640177 Dundee DD1 9SY Scotland UK net
[email hidden] dundee.ac.uk~pjclinchOpen ↗

On Thu, 11 Mar 2004 10:22:47 -0000, Tony Raven <[email hidden]>

Quoted message said:

Colin Blackburn said:

In the short term I can put on the original rea wheel
which has an SRAM 3-speed (though I'd have to find a
changer) but cycling in Durham would probably become less
pleasant.

Colin

Join the BromptonTalk newsgroup on Yahoo and you'll find
people there who can tell you exactly what the problem is
and how to get it fixed.

I have been a member of that group but I unsubscribe due
to vast amount of utter drivel I seemed to be receiving.
I posted here because I considered it a Sturmey Archer
hub problem.

Colin
--

On Thu, 11 Mar 2004 10:54:13 +0000, Peter Clinch <[email hidden]>

Quoted message said:

Note that you can retrofit the 6 speed conversion kit to
any Mk3 that was supplied with the SRAM hub: all the braze-
ons etc. should be there. IIRC it's ~£70.

Yes, I've been looking at that but I'm reticent to go
that way unless I know the SA is dead---although as I do
have a Mk 3 I did wonder about the conversion kit
creating a 10-speed.

Quoted message said:

I did have a go on a 6, and it works just fine, but having
used the 3 with no problems was wary that I knew I didn't
*need* it, not generally a consideration I'll grant you
but on a runabout/hack it is. But OTOH my L3 has the -18%
gear reduction (I can't remember if that's done at
sprocket, crank or both,

I have the 12% reduction which is chainring, I thin the 18%
is chainring and sprocket.

Quoted message said:

Brompton will be able to tell you I'd think) which does
make a *big* difference. Dundee has some Real Hills, and
having ridden a standard geared Mk 2 for a while I have
practical experience of the significance of the change.
You spin out down hills, granted, but if I'm you're in a
Big Hurry down hills you're on the wrong bike anyway!

I'd be more than happy to spin out as long as I could
spina at all!

Colin
--

Peter Clinch said:

Note that you can retrofit the 6 speed conversion kit to
any Mk3 that was supplied with the SRAM hub: all the braze-
ons etc. should be there. IIRC it's ~£70.

When it works the 5 speed is much better than the six.
Easier gear change on one control rather than remembering
the sequence for two levers and doesn't have the derailleur
which some have reported gets gunged up

Tony

Colin Blackburn said:

Yes, I've been looking at that but I'm reticent to go
that way unless I know the SA is dead---although as I do
have a Mk 3 I did wonder about the conversion kit
creating a 10-speed.

Could be a goer, though check with Brom to ensure no SRAM
specific gotchas.

Quoted message said:

I have the 12% reduction which is chainring, I thin the
18% is chainring and sprocket.

Bonus! just means a new rear sprocket and you'll be able to
take on nastier hills without too much trouble, and you're
not too far out of pocket either.

Pete.
--
Peter Clinch University of Dundee Tel 44 1382 660111 ext.
33637 Medical Physics, Ninewells Hospital Fax 44 1382 640177
Dundee DD1 9SY Scotland UK net [email hidden]
dundee.ac.uk~pjclinchOpen ↗

On Thu, 11 Mar 2004 09:58:44 -0000 someone who may be "Colin
Blackburn" <[email hidden]> wrote this:-

Quoted message said:

It happened this morning, I had just cycled down the hill
from Durham station and started up the mild hill around the
back of the town. I'd not set the seat post right and so I
stopped at the kerbside and adjusted it a little. Then as I
pulled off the gears slipped and I went nowhere. I ran it
through the gears and there was no bite in any gear.

With luck the hub might just be out of adjustment. There are
instructions on adjusting it in the manual that comes with
Bromptons or at toehead.demon.co.uktoehead.demon.co.ukOpen ↗.

If you are unlucky then it is possible to fit a new five
speed hub in the old shell, instructions are in A to B
magazine. Alternatively there is the three to six speed
conversion kit.

--
David Hansen, Edinburgh | PGP email preferred-key number
F566DA0E I will always explain revoked keys, unless the UK
government prevents me using the RIP Act 2000.

David Hansen said:

On Thu, 11 Mar 2004 09:58:44 -0000 someone who may be
"Colin Blackburn" <[email hidden]> wrote this:-

Quoted message said:

It happened this morning, I had just cycled down the hill
from Durham station and started up the mild hill around
the back of the town. I'd not set the seat post right and
so I stopped at the kerbside and adjusted it a little.
Then as I pulled off the gears slipped and I went
nowhere. I ran it through the gears and there was no bite
in any gear.

With luck the hub might just be out of adjustment. There
are instructions on adjusting it in the manual that comes
with Bromptons or at toehead.demon.co.uktoehead.demon.co.ukOpen ↗.

Cheers, I managed to find the pdf they have taken this from.
It looks like another day in the workshop not finishing the
recumbent!

Quoted message said:

If you are unlucky then it is possible to fit a new five
speed hub in the old shell, instructions are in A to B
magazine. Alternatively there is the three to six speed
conversion kit.

I think I'll fit the 3-speed back on in the first instance
and then decide what to do once I know what's happened to
the SA. If I'm really lucky Sunrace-SA will have brought out
a Brompton version of their 8-speed by the time I get around
to making a decision.

Colin
--

In article said:

If you are unlucky then it is possible to fit a new five
speed hub in the old shell, instructions are in A to B
magazine. Alternatively there is the three to six speed
conversion kit.

I just bought a copy of February's A to B in a LBS. From
that: "GERMANY Fancy an 8-speed Brompton? Engineer Juliane
Nuess has been building conversions based around the 7-speed
- and more recently 8-speed - Nexus hubs for some time.
Prices vary from E300 (£211) for an 8-speed wheel on an
exchange basis to E440 (£310) for an 8-speed fully fitted.
Prices do not include postage. Contact Juliane Neuss mail
info at junik-hpv.de"

(Where the mail address actually has an @ and Neuss really
has an Esszett (Neuÿ if I've got it right and this hasn't
been mangled on the way - the thing that looks like a
beta) so maybe ought to be Neusz. £ is supposed to be a
pound sign.)

Simon Brooke wrote: <snip> Sturmey Archer: Just Say No!
</snip> <snip> Sturmey Archer: Just Say No! </snip> <snip>
Sturmey Archer: Just Say No! </snip>

A fan of Sturmey Archer then are ya? 😉

Simon Brooke wrote: <snip> Sturmey Archer: Just Say No!
</snip> <snip> Sturmey Archer: Just Say No! </snip> <snip>
Sturmey Archer: Just Say No! </snip>

A fan of Sturmey Archer then are ya? 😉

On Thu, 11 Mar 2004 09:58:44 -0000, "Colin Blackburn"
<[email hidden]> wrote:

🙂The effing thing has only been back on the road two weeks
:and I think it )might have had what might be called a
:catastrophic failure. The Brommie )itself is fine but I
:have lost transmission. The pedals go around but the )wheel
:doesn't! ) )Then as I pulled off the gears slipped and I
:went nowhere. I ran )it through the gears and there was no
:bite in any gear. I pushed the bike )up the hill to a level
:side road to try again and nothing. Each time I )start to
:pull of there is an initial catching which then slips
🙂immediately. The cog goes round and when being wheeled
:along it makes its )usual pleasant purring sound. ) )The
:hub is an SA 5-speed. Any ideas what might be wrong? It's
:bad news )isn't it? Go on, you can tell me!

No, I don't think so 🙂

Sounds like you have a 13T sprocket on it - now with an
additional radial crack in it !

Requires replacing (~£4 or free if you chat Brompton up)
with the stronger 14 tooth variant.

Reasonably ok D-I-Y job but do spec. the wider sprocet .25"
rather than 3/16

My first one failed on the "hills" of Norfolk ! after a few
years. The second, a 13T 3/16 6 months later - hence the
recommendation of 14T
1/4"
--
Comm again, Mike.

On Fri, 12 Mar 2004 11:05:15 GMT, Simon Brooke <[email hidden]>
wrote:

🙂in message <[email hidden]>, Colin
:Blackburn )([email hidden]'😉 wrote: ) )> The
:effing thing has only been back on the road two weeks and I
🙂> think it might have had what might be called a
:catastrophic failure. )> The Brommie itself is fine but I
:have lost transmission. The pedals )> go around but the
:wheel doesn't! ) )That's not fscking Brompton, that's
:fscking Sturmey Archer.

Actually, if it's what I think it is, it's B using a non-
standard too small sprocket on the S-A hub. The small
sprockets are just not up to the loading.

🙂 )> In the short term I can put on the original rea wheel
:which has an )> SRAM 3-speed (though I'd have to find a
:changer). ) )That sounds a much better idea.

Using an "in-spec." sprocket's the answer.

I know Sturmey Archers are now made in
🙂Taiwan, but they're still at heart good old British
:Engineering, and )frankly I wouldn't touch one with a barge
:pole. Sturmey Archer: Just )Say No!

The only real prob. I've had is a wheel bearing prob. and
nowt to do with the gear's internals.
--
Comm again, Mike.

pmailkeey said:

On Thu, 11 Mar 2004 09:58:44 -0000, "Colin Blackburn"
<[email hidden]> wrote:
🙂The hub is an SA 5-speed. Any ideas what might be wrong?
:It's bad news )isn't it? Go on, you can tell me!

No, I don't think so 🙂

Thanks for that. I'll take a look when I get a chance.

Quoted message said:

Sounds like you have a 13T sprocket on it - now with an
additional radial crack in it !

Requires replacing (~£4 or free if you chat Brompton up)
with the stronger 14 tooth variant.

Reasonably ok D-I-Y job but do spec. the wider sprocet
.25" rather than 3/16

Ta.

Colin
--

A long time ago in a universe far away...

...pmailkeey said:

On Thu, 11 Mar 2004 09:58:44 -0000, "Colin Blackburn"
<[email hidden]> wrote:

Quoted message said:

🙂The hub is an SA 5-speed. Any ideas what might be wrong?
:It's bad news )isn't it? Go on, you can tell me!

No, I don't think so 🙂

Sounds like you have a 13T sprocket on it - now with an
additional radial crack in it !

In between repairing the borehole supply and screwing
together wood for the raised beds I finally managed to find
time to take the Brommie apart. And yes, Mike gets the
prize for the correct answer, the sprocket is well and
truly cracked.

Quoted message said:

Requires replacing (~£4 or free if you chat Brompton up)
with the stronger 14 tooth variant.

Reasonably ok D-I-Y job but do spec. the wider sprocet
.25" rather than 3/16

I will be trying to get one today.

Cheers,

Colin

Colin
--

In "]news:[email hidden],
Colin Blackburn <[email hidden]> typed:

Quoted message said:

A long time ago in a universe far away... ...pmailkeey

Quoted message said:

On Thu, 11 Mar 2004 09:58:44 -0000, "Colin Blackburn"
<[email hidden]> wrote:

Quoted message said:

🙂The hub is an SA 5-speed. Any ideas what might be
:wrong? It's bad
news 🙂isn't it? Go on, you can tell me!

No, I don't think so 🙂

Sounds like you have a 13T sprocket on it - now with an
additional radial crack in it !

In between repairing the borehole supply and screwing
together wood for the raised beds I finally managed to
find time to take the Brommie apart. And yes, Mike gets
the prize for the correct answer, the sprocket is well and
truly cracked.

Quoted message said:

Requires replacing (~£4 or free if you chat Brompton up)
with the stronger 14 tooth variant.

Reasonably ok D-I-Y job but do spec. the wider sprocet
.25" rather than 3/16

I will be trying to get one today.

If you want a lower gear, I've got a 16 tooth sprocket that
should work for you that's had a few hundred miles use but
should be OK. I'd be happy to mail it you for nowt.

A