spoke length for front dynohub

dan_s said:

Hi all
i'm new to this group
i just bought a dynohub, to be installed in a 3 gear raleigh
i googled extensively but couldn't find the correct length of spokes
for lacing.
parts specs are:
GH6 front dynohub, 16 holes on the wide side, 8 (double?) holes on the
narrow
26x1 3/8 or 590mm 36holes sturmey archer rim
i want to lace the standard way, is that 2 cross?
can anyone help with correct spoke length on each side and lacing
pattern? thanks
dan

There's a very thorough document on wheelbuilding with dynohubs that
originated at sturmey archer. You can find it in a google search and it
will most likely have the information you need.

Failing that you can take measurements of the hub and rim, and input them
into any spoke calculator that can handle different-sized flanges. I do
believe the standard lacing is 2 cross, I could check one of my wheels for
you if are unable to find this out.

Also, I believe that sturmey archer rim is steel? If you're taking the
time to make a handbuilt wheel and haven't already got the spokes, you
would do better with a sturdy double-wall aluminum rim, it will bulid a
much lighter wheel that's just as strong or stronger.

dan_s said:

Quoted message said:

parts specs are:
GH6 front dynohub, 16 holes on the wide side, 8 (double?) holes on the
narrow
26x1 3/8 or 590mm 36holes sturmey archer rim
i want to lace the standard way, is that 2 cross?
can anyone help with correct spoke length on each side and lacing pattern?
thanks
dan

you're in trouble: you've got a 32H hub and a 36H rim!
--
---
Marten Gerritsen

INFOapestaartjeM-GINEERINGpuntNL
www.m-gineering.nl

Quoted message said:

you're in trouble: you've got a 32H hub and a 36H rim!

i think not, the holes on the small side of the hub are "key holes",
made for two spokes in each AFAIK.
see picture here
http://www.sjscycles.com/store/4942sturmeyarcherfrontbig.jpg

Quoted message said:

you're in trouble: you've got a 32H hub and a 36H rim!

actually you're right
now you know how was sleeping during math lessons

"Jacobe Hazzard" <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

dan_s said:

Hi all
i'm new to this group
i just bought a dynohub, to be installed in a 3 gear raleigh
i googled extensively but couldn't find the correct length of spokes
for lacing.
parts specs are:
GH6 front dynohub, 16 holes on the wide side, 8 (double?) holes on the
narrow
26x1 3/8 or 590mm 36holes sturmey archer rim
i want to lace the standard way, is that 2 cross?
can anyone help with correct spoke length on each side and lacing
pattern? thanks
dan

.... you can take measurements of the hub and rim, and input them

Quoted message said:

into any spoke calculator that can handle different-sized flanges. I do
believe the standard lacing is 2 cross, I could check one of my wheels for
you if are unable to find this out.

Also, I believe that sturmey archer rim is steel? If you're taking the
time to make a handbuilt wheel and haven't already got the spokes, you
would do better with a sturdy double-wall aluminum rim, it will bulid a
much lighter wheel that's just as strong or stronger.

As has been mentioned your hub is meant for use with 32 spokes, and if
your rim has 36 spokes it would be less than desirable to build them
up together into a wheel. One on line calculator does have the SA
dynohub dimensions in its database, see
http://www.geocities.com/d_halem/wheel/wheel.html
It doesn't have the ERD for an old Sturmey Archer Steel rim.

Typical lacing for the SA dynohub is 2 cross for the high flange and 3
cross for the low flange. You can go 1 cross or radial for the high
flange if you prefer, the steel flange is less likely to fail under
radial spoking than aluminum hubs.

Harris cyclery lists a 32 hole 590 alloy Sun rim which you could use,
and they could probably sell you appropriate length spokes as well.
The rim listing is at http://sheldonbrown.com/harris/rims/590.html
This would make for a wheel that has some useful braking in wet
weather, and would work well with a nice relatively high pressure tire
like the Continental.

I do have some spare NOS 32 hole Dynohub equipped wheels with 590
Sturmey Archer steel rims, if you're in the US and want to buy one let
me know. Or I have NOS 32 hole Sturmey steel 590 rims and original
spokes that came out of a NOS wheel as well. It's probably not worth
the cost of shipping to anywhere else. I'd encourage you to consider
the aluminum rim from Harris though unless you plan to ride the bike
only in fair weather.

The Sturmey Archer Dynohub only produces about 1.8 Watts so a standard
3 Watt generator light will not work well. Reflectalite sells a
halogen bulb suited to the Dynohub, see
http://www.reflectalite.com/lightmodel.html#anchor439407
for a listing. They take Paypal and ship internationally so it's
convenient to order from them.

Best wishes with your Dynohub project,

Bill Putnam

http://www.rickadee.net/~zephyrus/ad4935/ad4935.html

original instructions

regards
Michael

"Bill Putnam" <[email hidden]> skrev i en meddelelse
news:[email hidden]...

Quoted message said:

"Jacobe Hazzard" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

dan_s said:

Hi all
i'm new to this group
i just bought a dynohub, to be installed in a 3 gear raleigh
i googled extensively but couldn't find the correct length of spokes
for lacing.
parts specs are:
GH6 front dynohub, 16 holes on the wide side, 8 (double?) holes on the
narrow
26x1 3/8 or 590mm 36holes sturmey archer rim
i want to lace the standard way, is that 2 cross?
can anyone help with correct spoke length on each side and lacing
pattern? thanks
dan

... you can take measurements of the hub and rim, and input them

Quoted message said:

into any spoke calculator that can handle different-sized flanges. I do
believe the standard lacing is 2 cross, I could check one of my wheels

for

Quoted message said:

Quoted message said:

you if are unable to find this out.

Also, I believe that sturmey archer rim is steel? If you're taking the
time to make a handbuilt wheel and haven't already got the spokes, you
would do better with a sturdy double-wall aluminum rim, it will bulid a
much lighter wheel that's just as strong or stronger.

As has been mentioned your hub is meant for use with 32 spokes, and if
your rim has 36 spokes it would be less than desirable to build them
up together into a wheel. One on line calculator does have the SA
dynohub dimensions in its database, see
http://www.geocities.com/d_halem/wheel/wheel.html
It doesn't have the ERD for an old Sturmey Archer Steel rim.

Typical lacing for the SA dynohub is 2 cross for the high flange and 3
cross for the low flange. You can go 1 cross or radial for the high
flange if you prefer, the steel flange is less likely to fail under
radial spoking than aluminum hubs.

Harris cyclery lists a 32 hole 590 alloy Sun rim which you could use,
and they could probably sell you appropriate length spokes as well.
The rim listing is at http://sheldonbrown.com/harris/rims/590.html
This would make for a wheel that has some useful braking in wet
weather, and would work well with a nice relatively high pressure tire
like the Continental.

I do have some spare NOS 32 hole Dynohub equipped wheels with 590
Sturmey Archer steel rims, if you're in the US and want to buy one let
me know. Or I have NOS 32 hole Sturmey steel 590 rims and original
spokes that came out of a NOS wheel as well. It's probably not worth
the cost of shipping to anywhere else. I'd encourage you to consider
the aluminum rim from Harris though unless you plan to ride the bike
only in fair weather.

The Sturmey Archer Dynohub only produces about 1.8 Watts so a standard
3 Watt generator light will not work well. Reflectalite sells a
halogen bulb suited to the Dynohub, see
http://www.reflectalite.com/lightmodel.html#anchor439407
for a listing. They take Paypal and ship internationally so it's
convenient to order from them.

Best wishes with your Dynohub project,

Bill Putnam