Moulton TSR 2 - Replacing Sturmey Archer S2C Gearhub
07-23-12, 09:29 PM
#1
Junior Member
Thread Starter
Join Date: Jul 2012
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Moulton TSR 2 - Replacing Sturmey Archer S2C Gearhub
Hi everyone, need some advice badly. My S2C hub is acting up and it's still new. Dealers here aren't too familiar with it. I'm looking for
advice if TSR 2 frame is able to be fitted with any other gearhub such as the Shimano Alfine Inter 8 or Nexus or even SRAM.
Also if I can still use the belt drive system with the new gear hub? I understand that I will have to have gearshift cables and rear-brake cables
since TSR 2 concept was all about the magic of cable-less.
S2C hub that I got now has locked up on me twice and almost fell face first. The drum brakes are also scary, making clunk sounds when
braking, especially going downhill. Overall not a pleasant experience with SA hub but I love the concept of belt drive.
Huge thanks for your time.
advice if TSR 2 frame is able to be fitted with any other gearhub such as the Shimano Alfine Inter 8 or Nexus or even SRAM.
Also if I can still use the belt drive system with the new gear hub? I understand that I will have to have gearshift cables and rear-brake cables
since TSR 2 concept was all about the magic of cable-less.
S2C hub that I got now has locked up on me twice and almost fell face first. The drum brakes are also scary, making clunk sounds when
braking, especially going downhill. Overall not a pleasant experience with SA hub but I love the concept of belt drive.
Huge thanks for your time.
07-25-12, 07:35 AM
#2
Palmer
Join Date: Mar 2007
Location: Parts Unknown
Posts: 8,599
Bikes: Mike Melton custom, Alex Moulton AM, Dahon Curl
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 1657 Post(s)
Liked 1,803 Times
in
1,050 Posts
Sure, you can swap it for almost any IGH. Nearly all IGHs use the same cogs, so the belt drive cog will transfer over. A three speed IGH (Sturmey SRC3, Shimano SG-3C41 or SRAM iMotion 3 Coaster) would give you pretty much the same two gear ratios you have now, plus another, lower one.
You could go with a SRAM Automatix 2-speed and retain the 'no cables' set up. The Automatix has the same two ratios as the Sturmey S2C. The Automatix will shift itself from direct ratio at quite a low speed with the Moulton TSR's 20" wheels (IIRC, something like 10~11kph).
Coaster brake?
You could go with a SRAM Automatix 2-speed and retain the 'no cables' set up. The Automatix has the same two ratios as the Sturmey S2C. The Automatix will shift itself from direct ratio at quite a low speed with the Moulton TSR's 20" wheels (IIRC, something like 10~11kph).
Coaster brake?
07-25-12, 07:59 AM
#3
Senior Member
Join Date: Jan 2010
Posts: 433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times
in
1 Post
A few of us have already swapped out the S2C for the SRAM A2. Its a drop in fit (note the dropout spacing is 120mm on the TSR2) works perfectly with the exisitng belt drive and IMHO is a much better implementation of a two speed hub over the unpredictable and as you say locking up S/A S2C.
The post details are over on the folding bike forum even though the TSR is not really a folder but rather a splitter
What you need to decide is the change point i.e. what speed you want it to change gear at.
Regards
Jerry
The post details are over on the folding bike forum even though the TSR is not really a folder but rather a splitter
What you need to decide is the change point i.e. what speed you want it to change gear at.
Regards
Jerry
Last edited by jerrysimon; 07-25-12 at 10:08 AM.
07-27-12, 02:37 PM
#4
Palmer
Join Date: Mar 2007
Location: Parts Unknown
Posts: 8,599
Bikes: Mike Melton custom, Alex Moulton AM, Dahon Curl
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 1657 Post(s)
Liked 1,803 Times
in
1,050 Posts
The SRAM Automatix shift point is determined at the factory and depends solely on rotational speed (it's independent from gearing). It is possible for an end user to to go into the hub's internal mechanism and muck with the spring rates to change the shift point, but be aware that will void the hub's warranty.
07-30-12, 06:19 AM
#5
Junior Member
Thread Starter
Join Date: Jul 2012
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Sure, you can swap it for almost any IGH. Nearly all IGHs use the same cogs, so the belt drive cog will transfer over. A three speed IGH (Sturmey SRC3, Shimano SG-3C41 or SRAM iMotion 3 Coaster) would give you pretty much the same two gear ratios you have now, plus another, lower one.
You could go with a SRAM Automatix 2-speed and retain the 'no cables' set up. The Automatix has the same two ratios as the Sturmey S2C. The Automatix will shift itself from direct ratio at quite a low speed with the Moulton TSR's 20" wheels (IIRC, something like 10~11kph).
Coaster brake?
You could go with a SRAM Automatix 2-speed and retain the 'no cables' set up. The Automatix has the same two ratios as the Sturmey S2C. The Automatix will shift itself from direct ratio at quite a low speed with the Moulton TSR's 20" wheels (IIRC, something like 10~11kph).
Coaster brake?
Thanks so much for your response..gives me the confidence to pursue the replacement of S2C. I've been putting some miles on TSR2, and 5 speeds are probably the best option for me in case I wanna go faster in the future. But your 3 speed suggestions are really good too.
Thx so much for taking the time.
07-30-12, 06:39 AM
#6
Junior Member
Thread Starter
Join Date: Jul 2012
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
A few of us have already swapped out the S2C for the SRAM A2. Its a drop in fit (note the dropout spacing is 120mm on the TSR2) works perfectly with the exisitng belt drive and IMHO is a much better implementation of a two speed hub over the unpredictable and as you say locking up S/A S2C.
The post details are over on the folding bike forum even though the TSR is not really a folder but rather a splitter
What you need to decide is the change point i.e. what speed you want it to change gear at.
Regards
Jerry
The post details are over on the folding bike forum even though the TSR is not really a folder but rather a splitter
What you need to decide is the change point i.e. what speed you want it to change gear at.
Regards
Jerry
07-30-12, 06:41 AM
#7
Junior Member
Thread Starter
Join Date: Jul 2012
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
TCS...you're right...changing the Automatix means opening it up...so that's out for me. Actually like you said, if I were to go cable-less, only Automatix is the way to go. Do you know if there is any attachable cable guide in case I want to go the cable route as in putting on the 5 speeder which means I need gear and brake cables....
09-18-12, 09:03 AM
#8
Junior Member
Join Date: Sep 2012
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Manufacturers date of your S2C hub
Hi everyone, need some advice badly. My S2C hub is acting up and it's still new. Dealers here aren't too familiar with it. I'm looking for
advice if TSR 2 frame is able to be fitted with any other gearhub such as the Shimano Alfine Inter 8 or Nexus or even SRAM.
Also if I can still use the belt drive system with the new gear hub? I understand that I will have to have gearshift cables and rear-brake cables
since TSR 2 concept was all about the magic of cable-less.
S2C hub that I got now has locked up on me twice and almost fell face first. The drum brakes are also scary, making clunk sounds when
braking, especially going downhill. Overall not a pleasant experience with SA hub but I love the concept of belt drive.
Huge thanks for your time.
advice if TSR 2 frame is able to be fitted with any other gearhub such as the Shimano Alfine Inter 8 or Nexus or even SRAM.
Also if I can still use the belt drive system with the new gear hub? I understand that I will have to have gearshift cables and rear-brake cables
since TSR 2 concept was all about the magic of cable-less.
S2C hub that I got now has locked up on me twice and almost fell face first. The drum brakes are also scary, making clunk sounds when
braking, especially going downhill. Overall not a pleasant experience with SA hub but I love the concept of belt drive.
Huge thanks for your time.
When Sturmey made hubs in Nottingham, they were stamped with a four digit code on the shell, ie 0869 for August 1969. Have Suntour continued the practise?
Is it manufacturing or an assembly problem, were your replacements current and to latest specifications?, I have read a post that some S2C hubs were shipped incomplete, a part missed in assembly.
Thinking of the near-indestructible AW and FW hubs, good for decades of use, it is a hard pill to swallow, a basic Sturmey hub with reliability issues
Last edited by E27006; 09-18-12 at 09:16 AM.
08-19-13, 06:00 AM
#9
Richard C
Join Date: Jan 2006
Location: London
Posts: 17
Bikes: Moulton TSR, Brompton 9-speed, Brompton 6-speed, Pashley Sovereign Princess
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
A few of us have already swapped out the S2C for the SRAM A2. Its a drop in fit (note the dropout spacing is 120mm on the TSR2) works perfectly with the exisitng belt drive and IMHO is a much better implementation of a two speed hub over the unpredictable and as you say locking up S/A S2C.
The post details are over on the folding bike forum even though the TSR is not really a folder but rather a splitter
What you need to decide is the change point i.e. what speed you want it to change gear at.
Regards
Jerry
The post details are over on the folding bike forum even though the TSR is not really a folder but rather a splitter
What you need to decide is the change point i.e. what speed you want it to change gear at.
Regards
Jerry
Thread
Thread Starter
Forum
Replies
Last Post
vmaniqui
Folding Bikes
20
05-21-10 04:24 PM
