Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-26-10, 07:55 AM   #1
Joako
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes:
Posts: 262
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sturmey Archer S2C + More

Duomatic type hubs are back! Can't wait to make the 8 speed Brompton to a more simplified machine. Pictures of the S2C plus other new hubs below:

http://sunrace-sturmeyarcher.blogspo...bike-show.html

Sturmey already posted the info on their website.

http://www.sturmey-archer.com/products/hubs
Joako is offline   Reply With Quote
Old 03-26-10, 08:09 AM   #2
miamimike
Senior Member
 
Join Date: Nov 2009
Bikes:
Posts: 175
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Interesting. Thx
miamimike is offline   Reply With Quote
Old 03-26-10, 04:32 PM   #3
pibach
Senior Member
 
Join Date: Apr 2007
Bikes: Dahon Mu Sport & Mu Ex
Posts: 299
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
S2 weight - 930g
S2c 1400g
Bummer.

Only the 5 gears S-RF5 with 1090g has a reasonable weight per gear ratio.
pibach is offline   Reply With Quote
Old 03-26-10, 06:02 PM   #4
Dahon.Steve
Senior Member
 
Join Date: Dec 2001
Location: New Jersey
Bikes:
Posts: 6,826
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Why would you want a two speed hub? The three speed gives you a low and high while the two speed only gives you direct drive and low.

I like the other hub which is supposed to go after the Sram Dual Drive. Interesting.
Dahon.Steve is offline   Reply With Quote
Old 03-26-10, 06:31 PM   #5
chucky
It's got electrolytes!
 
chucky's Avatar
 
Join Date: Aug 2009
Bikes: Self-designed carbon fiber highracer, BikesDirect Kilo WT5, Pacific Cycles Carryme, Dahon Boardwalk with custom Sturmey Archer wheelset
Posts: 1,388
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Dahon.Steve View Post
Why would you want a two speed hub? The three speed gives you a low and high while the two speed only gives you direct drive and low.

I like the other hub which is supposed to go after the Sram Dual Drive. Interesting.
A two speed hub can be shifted by backpedaling, eliminating the need for a shifter and simplifying the riding experience.

With the revival of old designs here's hoping they put the IG rear dynohub back into production. Even better if they upgrade it to an 8-speed.

Last edited by chucky; 03-26-10 at 06:34 PM.
chucky is offline   Reply With Quote
Old 03-26-10, 06:47 PM   #6
SesameCrunch
Eschew Obfuscation
 
SesameCrunch's Avatar
 
Join Date: Aug 2005
Location: San Francisco Bay Area
Bikes: 2005 Fuji Professional, 2002 Lemond Zurich, Folders - Strida, Merc, Dahon, Downtube, Recumbent folder
Posts: 3,850
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Great news indeed. I can't wait for it to be available. I hope there are no more delays, though....

Chucky is right. The kick-shift and coaster brake hub eliminates all cables going to the back. You can see that on my Moulton MK3 restoration with the original Duomatic hub. Nice clean look. It also provides a great, fun riding experience. Not for hammerfests, tho....

__________________

Last edited by SesameCrunch; 03-26-10 at 06:50 PM.
SesameCrunch is offline   Reply With Quote
Old 03-26-10, 09:28 PM   #7
Rob_E
Senior Member
 
Rob_E's Avatar
 
Join Date: Jan 2008
Location: Raleigh, NC
Bikes: Surly World Troller, Dahon Boardwalk, Raleigh 20, and the frame of a Surly Longhaul Trucker
Posts: 1,926
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Quote:
Originally Posted by Dahon.Steve View Post
Why would you want a two speed hub? The three speed gives you a low and high while the two speed only gives you direct drive and low.

I like the other hub which is supposed to go after the Sram Dual Drive. Interesting.
I like gears. But I have an old Sears Tote-Cycle that splits in two. Right now it's single speed because I damaged the three speed hub I had on it, but when it has gears, the shifter sits underneath the seat. That way the bike has no cables running from the front to the back (coaster brake), so you can easily split the bike. I love the bike, but having a shifter mounted on the seat tube is a pain. I'm building a new 3 speed wheel because single-speeding is a pain, but I also keep wondering if a kick-back hub would be better. No cables at all other than the front brake. Could make shifting and transporting the bike a lot easier.
Rob_E is offline   Reply With Quote
Old 03-26-10, 11:27 PM   #8
SesameCrunch
Eschew Obfuscation
 
SesameCrunch's Avatar
 
Join Date: Aug 2005
Location: San Francisco Bay Area
Bikes: 2005 Fuji Professional, 2002 Lemond Zurich, Folders - Strida, Merc, Dahon, Downtube, Recumbent folder
Posts: 3,850
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Rob_E View Post
I like gears. But I have an old Sears Tote-Cycle that splits in two. Right now it's single speed because I damaged the three speed hub I had on it, but when it has gears, the shifter sits underneath the seat. That way the bike has no cables running from the front to the back (coaster brake), so you can easily split the bike. I love the bike, but having a shifter mounted on the seat tube is a pain. I'm building a new 3 speed wheel because single-speeding is a pain, but I also keep wondering if a kick-back hub would be better. No cables at all other than the front brake. Could make shifting and transporting the bike a lot easier.
Sounds like a very good application for the S2C.
__________________
SesameCrunch is offline   Reply With Quote
Old 03-27-10, 07:30 AM   #9
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts unknown
Bikes:
Posts: 4,677
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
These two-speed kick back hubs could be combined with a Schlumpf Speed Drive for four usable, wide-range gears with NO cables or shifters. Something like: 40-55-66-91 For certain folding bike applications that could be nifty.

tcs
tcs is offline   Reply With Quote
Old 03-27-10, 07:32 AM   #10
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts unknown
Bikes:
Posts: 4,677
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Quote:
Originally Posted by Dahon.Steve View Post
... while the two speed only gives you direct drive and low.
These Sturmey 2-speeds actually have direct drive and a +38% high gear.

Best,
tcs
tcs is offline   Reply With Quote
Old 03-28-10, 10:40 AM   #11
Rob_E
Senior Member
 
Rob_E's Avatar
 
Join Date: Jan 2008
Location: Raleigh, NC
Bikes: Surly World Troller, Dahon Boardwalk, Raleigh 20, and the frame of a Surly Longhaul Trucker
Posts: 1,926
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Quote:
Originally Posted by tcs View Post
These two-speed kick back hubs could be combined with a Schlumpf Speed Drive for four usable, wide-range gears with NO cables or shifters. Something like: 40-55-66-91 For certain folding bike applications that could be nifty.

tcs
That could be pretty sweet. Whenever I check out the Schlumpf drives, I'm always reminded how far out of my price range they are, but they sure seem tempting. Although I'm guessing there's no way to fit one in my Tote/Cycle. It's a one-piece crank, and, while I've been planning to get an adapter to put more modern cranks on it, I'd be surprised if that could work with a Schumpf. But for the right bike, you're right. Good gear range, no lines to get in the way when folding. No finnicky shifter to get out of adjustment.
Rob_E is offline   Reply With Quote
Old 03-30-10, 02:48 PM   #12
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,806
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Quote:
Originally Posted by tcs View Post
These two-speed kick back hubs could be combined with a Schlumpf Speed Drive for four usable, wide-range gears with NO cables or shifters. Something like: 40-55-66-91
I had a folding bike outfitted with exactly that, but didn't like it - the gears mostly used are the 2 in the middle, assuming you're not riding hills most of the time. That requires 2 shifts each time you change gears. I commuted like that a few times but found it very cumbersome, so dismantled the bike again. I also didn't like the way the Duomatic changed gear with every brake, I was forever guessing what gear it was in and back-pedalling to get it into the gear I wanted. So I sold that bike with the Duomatic still installed.
jur is offline   Reply With Quote
Old 03-30-10, 03:06 PM   #13
mconlonx 
Nobody
 
mconlonx's Avatar
 
Join Date: Jun 2007
Bikes:
Posts: 7,086
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 208 Post(s)
Quote:
Originally Posted by jur View Post
I had a folding bike outfitted with exactly that, but didn't like it - the gears mostly used are the 2 in the middle, assuming you're not riding hills most of the time. That requires 2 shifts each time you change gears. I commuted like that a few times but found it very cumbersome, so dismantled the bike again. I also didn't like the way the Duomatic changed gear with every brake, I was forever guessing what gear it was in and back-pedalling to get it into the gear I wanted. So I sold that bike with the Duomatic still installed.
Spoilsport. Letting reality get in the way of perfectly good theory. Humbug.

I'm hugely interested in exactly such a setup--good to hear some real world feedback... even if it's not what I want to hear.
__________________
I know next to nothing. I am frequently wrong.
mconlonx is offline   Reply With Quote
Old 03-30-10, 03:32 PM   #14
social suicide
Senior Member
 
social suicide's Avatar
 
Join Date: Oct 2007
Location: Marquette
Bikes:
Posts: 672
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I welded an extra tube on my tote-cycle and added the SA sportshift.The SA coaster brake sure screeches when it heats up comming down a long hill!




Yes those are campy cranks and three colors of chain!
And I had to put the small chainring on the outside to get a good chainline.
social suicide is offline   Reply With Quote
Old 03-30-10, 08:38 PM   #15
Rob_E
Senior Member
 
Rob_E's Avatar
 
Join Date: Jan 2008
Location: Raleigh, NC
Bikes: Surly World Troller, Dahon Boardwalk, Raleigh 20, and the frame of a Surly Longhaul Trucker
Posts: 1,926
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
That is awesome. I had been wondering about doing something like that with shifting. Seems like it'd be better than reaching under the seat to shift. How did you manage the crank/bottom bracket conversion? I've been considering something like this: http://harriscyclery.net/product/tru...apter-1335.htm

Is that what you used, or is there some other solution?
Rob_E is offline   Reply With Quote
Old 03-30-10, 10:58 PM   #16
randya
Senior Member
 
randya's Avatar
 
Join Date: Jul 2003
Location: in bed with your mom
Bikes: who cares?
Posts: 13,689
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've got a Bendix kickback 2-speed w/ coaster on a '65 Schwinn Lil Chic
randya is offline   Reply With Quote
Old 03-31-10, 05:57 AM   #17
social suicide
Senior Member
 
social suicide's Avatar
 
Join Date: Oct 2007
Location: Marquette
Bikes:
Posts: 672
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I used one of these http://www.amazon.com/Bottom-Bracket.../dp/B0015XPIIA on my tote cycle.
social suicide is offline   Reply With Quote
Old 03-31-10, 11:05 AM   #18
Rob_E
Senior Member
 
Rob_E's Avatar
 
Join Date: Jan 2008
Location: Raleigh, NC
Bikes: Surly World Troller, Dahon Boardwalk, Raleigh 20, and the frame of a Surly Longhaul Trucker
Posts: 1,926
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Thanks! Now I have options. That way is certainly the more cost effective way to go, too.
Rob_E is offline   Reply With Quote
Old 04-01-10, 12:44 AM   #19
Carcinogent
Senior Member
 
Join Date: Jan 2010
Location: France
Bikes:
Posts: 132
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
S2C certainly is worth a try on my Brompton. One, possibly no cables running to the back, not a real range though with a +38% jump. Although what I am really looking for is a revival of the old medium range hubs. I am currently running AM internals inside a S-RF3 shell. Although all threads and such fit very nice I would like to have new AM internals new with no NIG and all the like. Even perfectly overhauled/lubricated/adjusted the hub shifts a little dodgy as compared to the brand new S-RF3. Note of caution though is that my only experience before the AM conversion was with S-RF3. Maybe old AWs shift the same as my current AM....it is really unforgiving even under the slightest load. With my S-RF3 I could find the sweet spot in the crank revolution where gears would just naturally find each other.

-Carcinogent
Carcinogent is offline   Reply With Quote
Old 04-01-10, 01:34 AM   #20
kamtsa
Senior Member
 
kamtsa's Avatar
 
Join Date: Dec 2008
Bikes:
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
"Also new for this year is the CS-RF3 and CS-RK3 cassette 3 speed hubs. A hub that allows you to lose the front derailleur all together. Now you can run a multi speed cassette on a 3 speed internally geared hub. You can use any Shimano compatible shifters with this setup. "

This looks as a DualDrive replacement that works with standard shifters. A good solution drop bars + brifters. The DD uses propriety left shifter cable pull.
kamtsa is offline   Reply With Quote
Old 07-28-10, 08:26 PM   #21
Joako
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes:
Posts: 262
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
They have landed in the USA. Looking forward on testing it in a Brompton this weekend
Attached Images
File Type: jpg P1030336..jpg (91.1 KB, 33 views)
Joako is offline   Reply With Quote
Old 07-29-10, 09:58 AM   #22
Dynocoaster
Senior Member
 
Join Date: May 2004
Location: Pacific Northwest
Bikes: Too many....................
Posts: 3,075
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I checked with Harris and they can build a wheel with the S2C for around $185 plus shipping.
Dynocoaster is offline   Reply With Quote
Old 08-11-10, 12:42 AM   #23
meb
Senior Member
 
meb's Avatar
 
Join Date: Aug 2003
Location: arlington, VA
Bikes:
Posts: 1,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Joako View Post
Duomatic type hubs are back! Can't wait to make the 8 speed Brompton to a more simplified machine. Pictures of the S2C plus other new hubs below:

http://sunrace-sturmeyarcher.blogspo...bike-show.html

Sturmey already posted the info on their website.

http://www.sturmey-archer.com/products/hubs
I discovered the S2C and B2C when looking for an S3X at Harris.
Any opinions on quality of the Sturmey S2C&B relative the Sachs and Bendix kickbacks?

Any difference between the S2C & B2c other than weight & price?
How much weight difference is there?

Last edited by meb; 08-11-10 at 01:06 AM. Reason: corrected B2C steel kickback hub
meb is offline   Reply With Quote
Old 08-11-10, 12:54 AM   #24
meb
Senior Member
 
meb's Avatar
 
Join Date: Aug 2003
Location: arlington, VA
Bikes:
Posts: 1,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I noticed there are S3X 13T cogs for 3/32 chain. Will the S3X cogs work ok (assuming the ratio works) on the three kickback 2 speeds Sturmey has?
Are there any 3/32 chain compatible cogs for the Sturmey kickbacks in the 16-20T range?
meb is offline   Reply With Quote
Old 08-11-10, 11:07 PM   #25
meb
Senior Member
 
meb's Avatar
 
Join Date: Aug 2003
Location: arlington, VA
Bikes:
Posts: 1,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by chucky View Post
A two speed hub can be shifted by backpedaling, eliminating the need for a shifter and simplifying the riding experience.

With the revival of old designs here's hoping they put the IG rear dynohub back into production. Even better if they upgrade it to an 8-speed.
Further, the lack of cables ease removal, installation and substitution.
In the winter, cables often ice up- the kick back/coaster approach has a big advantage in winter cycling.
meb is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 02:19 AM.