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Rethinking SRAM Dual Drive

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Rethinking SRAM Dual Drive

Old 04-02-18, 06:04 PM
  #76  
badmother
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Originally Posted by Abu Mahendra View Post
installing a chain on a SRAM DD ala Sachs? hmmm...why? what's the problem with the SRAM DD clickbox and needle? fragile, prone to falling off? bullocks. In 40 months of ownership riding it hard at times, and on two tours, i still run the original needle and clickbox, and the latter has never come off once. if it ain't broke, don't fix it.

short and stubby RD? You want Shimano Zee...
Well, the peopel discussing this mod has got much more experience between them than what you describe. Also they have the ability to calmly discuss theyr experience between them and also to listen to eachothers opinions without anger and lack of respect. Amazing, is`nt it? Something worth trying!
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Old 04-02-18, 06:30 PM
  #77  
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you conveniently avoid the issue by ad hominem. the issue is why attempt an unnecessary hack when the thing is already solid? your veiled vitriol does not replace reasoning or answering the question. i listened to you, to your post. i am sorry if i asked a thorny question for which, evidently, you have no answer by the looks of your response. the plain fact is that i have a bit of experience with SDD. i even own one, and have used it extensively, unlike you. good luck with that hack...


Originally Posted by badmother View Post
Well, the peopel discussing this mod has got much more experience between them than what you describe. Also they have the ability to calmly discuss theyr experience between them and also to listen to eachothers opinions without anger and lack of respect. Amazing, is`nt it? Something worth trying!

Last edited by Abu Mahendra; 04-02-18 at 06:36 PM.
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Old 04-02-18, 07:24 PM
  #78  
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Originally Posted by badmother View Post
not impressed. I set it up with a SA twist grip i had laying around for the IGH instead just to see if it would shift properly as they say. I`ll order a different SA shifter for the left side later.


If i buy another one for my white folder I`ll go with Sturmey Archer to get the pull chain instead of the clickbox you find on the Shram systems. I have been reading a lot recently and I find peopel using Shram discussing if you can remove the pin and click box and use a pull chain instead. My Sachs has got the chain and I like that.
I have both the Sachs 3x7 and the SRAM Dual Drive.. I like the chain more for aesthetics reasons than anything else..and, I've yet to have a problem with a click box... but I did toy with seeing what I needed to do to convert a DD to chain.. there are some immediate problems .. as you can see from the picture the IGH internal attachment is in a completely different position.. more towards the drive side with the Sachs, and more towards the non-driveside with the SRAM by almost 3".. that's where I stopped .. wasn't going to be worth the effort for my purposes.


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Old 04-03-18, 02:53 AM
  #79  
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That is a huge difference for sure! I think maybe I would do what you did, just use the clickbox. I found the discussion about converting to chain when I searched for info on shifters. I found Aron saying all the Shram 3 speed IGH shifters was interchangable but still not sure if the Sachs/Shram 3 speed shifters are, that is why I am thinking of buying a SA shifter. I know from experience (and from the info on the IN) that you can use SA 3 speed IGH shifters with Sachs hubs but not Sachs 3 speed IGH shifters on SA hubs.

I think the guys discussing the clickbox conversion wanted to get rid of the clunky clickbox and get a more "old scool" look, some of them are close to Sheldons level so "they just have to find out if it is possible..."

I think what I did with the Surly brake hanger and the cable splitter I copyed from a picture you posted of a
Moulton you have set up this way so that invention may be yours!
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Old 04-03-18, 10:28 AM
  #80  
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Originally Posted by badmother View Post
That is a huge difference for sure! I think maybe I would do what you did, just use the clickbox. I found the discussion about converting to chain when I searched for info on shifters. I found Aron saying all the Shram 3 speed IGH shifters was interchangable but still not sure if the Sachs/Shram 3 speed shifters are, that is why I am thinking of buying a SA shifter. I know from experience (and from the info on the IN) that you can use SA 3 speed IGH shifters with Sachs hubs but not Sachs 3 speed IGH shifters on SA hubs.

I think the guys discussing the clickbox conversion wanted to get rid of the clunky clickbox and get a more "old scool" look, some of them are close to Sheldons level so "they just have to find out if it is possible..."

I think what I did with the Surly brake hanger and the cable splitter I copyed from a picture you posted of a
Moulton you have set up this way so that invention may be yours!
My plan to convert a DD to chain pull was going to be to cut the DD long rod, flatten and drill the end, and attach the chain.. lot of other projects ahead of that though.. I use a SA bar end shifter for the Sram IGH.. no issues.. the SRAM/Sachs 3 speed shifters will work with SRAM/Sachs hubs, but they shift in reverse of each other .. Sachs defaults to high gear when relaxed, SRAM to low gear..
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Old 04-03-18, 01:36 PM
  #81  
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Originally Posted by BruceMetras View Post
My plan to convert a DD to chain pull was going to be to cut the DD long rod, flatten and drill the end, and attach the chain.. lot of other projects ahead of that though.. I use a SA bar end shifter for the Sram IGH.. no issues.. the SRAM/Sachs 3 speed shifters will work with SRAM/Sachs hubs, but they shift in reverse of each other .. Sachs defaults to high gear when relaxed, SRAM to low gear..
Slight correction: SRAM not equals SRAM.
SRAM also sold the older style 3x7 hub (Sachs) and branded it as SRAM Spectro 3x7. They have a different housing but are almost identical inside expect the clutch which had 6 claws in the older Sachs model and then 4 claws in the newer SRAM models.
But agreed the SRAM dual drive is completely different from the SRAM/SACHS 3x7. They are not compatible.

One more thing: The chains for the 3x7 are no longer available. I even can no longer find them in Germany. One can still buy the chain for the 3 speed where the pin is too short for the 3x7 or the chain for the 5 speed (left side) where the pin is too long. I need to try if I can use a 2mm die to extend the thread on the longer pin and then cut it to the correct length.
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Old 04-03-18, 03:57 PM
  #82  
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Originally Posted by Harhir View Post
Slight correction: SRAM not equals SRAM.
Not sure what you mean there, but I'm pretty sure we're on the same page


Originally Posted by Harhir View Post
SRAM also sold the older style 3x7 hub (Sachs) and branded it as SRAM Spectro 3x7. They have a different housing but are almost identical inside expect the clutch which had 6 claws in the older Sachs model and then 4 claws in the newer SRAM models.
But agreed the SRAM dual drive is completely different from the SRAM/SACHS 3x7. They are not compatible.

One more thing: The chains for the 3x7 are no longer available. I even can no longer find them in Germany. One can still buy the chain for the 3 speed where the pin is too short for the 3x7 or the chain for the 5 speed (left side) where the pin is too long. I need to try if I can use a 2mm die to extend the thread on the longer pin and then cut it to the correct length.
Let me know what length pin you need.. I have a reasonable collection in the drawer.. maybe I can mail you what you need..
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Old 04-06-18, 04:53 AM
  #83  
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Originally Posted by Harhir View Post
Slight correction: SRAM not equals SRAM.

One more thing: The chains for the 3x7 are no longer available. I even can no longer find them in Germany. One can still buy the chain for the 3 speed where the pin is too short for the 3x7 or the chain for the 5 speed (left side) where the pin is too long. I need to try if I can use a 2mm die to extend the thread on the longer pin and then cut it to the correct length.
I have not yet found anything (numbers or letters) to identify my hub but I guess I could post pictures and I am sure some of you can identify it.

About the chains (chain/rod combo) not being available: If you have the pin its self it should be possible to atatch a new chain to it, I did this some time back after buying my B with the old scool two chain 5 speed hub. It did not take me long to crush the chain on the left side and I managed to repair it. Removed the crushed chain carefully and just used a chain from a different pin/chain combo. I actually think I used one from an old Sachs 5 speed hub as that was what I had at the time. I used a small brass coloured nail as a rivet, cut it to lenght and carefully hammering it to hold the chain. I remember taking a amall nail or two as a spare on longer rides but never had to repair it. Also with this kind of drivetrain (as with the B SA two chain hub) all is not lost if half of the system can not be changed. You always have at least three gears
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