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  1. #1
    tcs
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    Sturmey-Archer R-SRF3

    Just in case anybody's not up to speed on this. It became available in 2011.

    The std Sturmey pull chain arrangement has been replaced in this model by a rotary cam (Sturmey patent, 1970!), with the shift actuation inside the dropouts. The shift cable is simple to attach/remove with no unthreading/readjusting of anything and no loose parts when disconnected. The R-SRF3 has a solid axle not weakened by any internal passageways or cut outs, and the axle nut threads are 3/8" like Shimano rather than 13/32" like other S.A. hubs. Otherwise, it continues with Sturmey goodness: the beautiful polished hub shell, NIG, comes in the box with all the nuts, washers, cable, shifter, cog, etc you need to put it in service, &etc. The cable pull requirements to shift the R-SRF3 are greater than the classic AW family of hubs, and it uses a different (factory) shifter. Mine came with a dual paddle 'push-push' (RapidFire style) straight bar shifter. 130mm OLD to make room for the rotary gear select.

    old-new.jpg
    "When man first set woman on two wheels with a pair of pedals, did he know, I wonder, that he had rent the veil of the harem in twain? A woman on a bicycle has all the world before her where to choose; she can go where she will, no man hindering." The Typewriter Girl, 1899.

    "Every so often a bird gets up and flies some place it's drawn to. I don't suppose it could tell you why, but it does it anyway." Ian Hibell, 1934-2008

  2. #2
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    Cool!
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    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  3. #3
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by tcs View Post
    Just in case anybody's not up to speed on this. It became available in 2011.

    The std Sturmey pull chain arrangement has been replaced in this model by a rotary cam (Sturmey patent, 1970!), with the shift actuation inside the dropouts. The shift cable is simple to attach/remove with no unthreading/readjusting of anything and no loose parts when disconnected. The R-SRF3 has a solid axle not weakened by any internal passageways or cut outs, and the axle nut threads are 3/8" like Shimano rather than 13/32" like other S.A. hubs. Otherwise, it continues with Sturmey goodness: the beautiful polished hub shell, NIG, comes in the box with all the nuts, washers, cable, shifter, cog, etc you need to put it in service, &etc. The cable pull requirements to shift the R-SRF3 are greater than the classic AW family of hubs, and it uses a different (factory) shifter. Mine came with a dual paddle 'push-push' (RapidFire style) straight bar shifter. 130mm OLD to make room for the rotary gear select.

    old-new.jpg
    I've got one of those here, but I don't have any build plans for it yet. One thing I will note is that one of the usual advantages of gearhubs is lost with this hub. The drive side flange is inset a great deal more than the non drive side, to the extent that the wheel would have nearly as much dish as a cassette type. There is quite a lot of axle protrusion, so I'm thinking when I do build it up, I'll put a 5mm nut on the non drive side to make it a 135 OLD just to alleviate the dish a bit.
    Gearhubs demystified and other cool stuff.


    Rule #12: The correct number of bikes to own is n+1

  4. #4
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    As much as I love the classic AW and its modern derivatives, this is probably better. As long as they keep making the classic stuff for people like me with narrow rear ends on our frames, I'll be happy.

  5. #5
    tcs
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    Oh, yeah, the AW/SRF3/etc chain pull hubs are all still in production. This hub is just something in addition.

    Quote Originally Posted by Dan Burkhart View Post
    There is quite a lot of axle protrusion, so I'm thinking when I do build it up, I'll put a 5mm nut on the non drive side to make it a 135 OLD just to alleviate the dish a bit.
    Good idea!
    "When man first set woman on two wheels with a pair of pedals, did he know, I wonder, that he had rent the veil of the harem in twain? A woman on a bicycle has all the world before her where to choose; she can go where she will, no man hindering." The Typewriter Girl, 1899.

    "Every so often a bird gets up and flies some place it's drawn to. I don't suppose it could tell you why, but it does it anyway." Ian Hibell, 1934-2008

  6. #6
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by tcs View Post
    Just in case anybody's not up to speed on this. It became available in 2011.

    The std Sturmey pull chain arrangement has been replaced in this model by a rotary cam (Sturmey patent, 1970!), with the shift actuation inside the dropouts. The shift cable is simple to attach/remove with no unthreading/readjusting of anything and no loose parts when disconnected. The R-SRF3 has a solid axle not weakened by any internal passageways or cut outs, and the axle nut threads are 3/8" like Shimano rather than 13/32" like other S.A. hubs. Otherwise, it continues with Sturmey goodness: the beautiful polished hub shell, NIG, comes in the box with all the nuts, washers, cable, shifter, cog, etc you need to put it in service, &etc. The cable pull requirements to shift the R-SRF3 are greater than the classic AW family of hubs, and it uses a different (factory) shifter. Mine came with a dual paddle 'push-push' (RapidFire style) straight bar shifter. 130mm OLD to make room for the rotary gear select.

    old-new.jpg
    Did your hub come with the auxiliary tool as shown in point # 3 on this document?
    http://www.sturmey-archer.com/userfi...2005-04-27.pdf
    It was not included with my hub, but I found it wasn't that hard to align the rotary mechanism without it.
    Gearhubs demystified and other cool stuff.


    Rule #12: The correct number of bikes to own is n+1

  7. #7
    Senior Member mrrabbit's Avatar
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    Symmetrical and Asymmetrical dish, I can live with...

    What I have noticed as the biggest improvement with IGH hubs - especially the last few I've worked on:

    Flange Thickness

    Which makes for a much "snugger" fit between the flange and the elbow of current spokes.

    =8-)
    4000+ wheels built since 1984...

    Disclaimer:

    1. I do not claim to be an expert in bicycle mechanics despite my experience.
    2. I like anyone will comment in other areas.
    3. I do not own the preexisting concepts of DISH and ERD.
    4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
    5. My all time favorite book is:

    Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life

  8. #8
    tcs
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    Quote Originally Posted by Dan Burkhart View Post
    Did your hub come with the auxiliary tool as shown in point # 3 on this document?
    Nope, but like you, I found it wasn't any big deal to align the fulcrum lever set without the auxiliary tool.
    "When man first set woman on two wheels with a pair of pedals, did he know, I wonder, that he had rent the veil of the harem in twain? A woman on a bicycle has all the world before her where to choose; she can go where she will, no man hindering." The Typewriter Girl, 1899.

    "Every so often a bird gets up and flies some place it's drawn to. I don't suppose it could tell you why, but it does it anyway." Ian Hibell, 1934-2008

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