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Wildly incomplete overview of current 3-speed hubs: SRAM

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  • prester_john_in_cathay
    The SRAM T3 is offered in a freewheel, coaster and drum brake model. The freewheel and coaster have steel shells; the drum model, aluminum. The T3 requires no
    Message 1 of 2 , Nov 28, 2008
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      The SRAM T3 is offered in a freewheel, coaster and drum brake model. The freewheel and
      coaster have steel shells; the drum model, aluminum.

      The T3 requires no special tools to completely dis/re-assemble. It has a quick disconnect
      shift cable and adjusts in 1st gear.

      SRAM specifies 0369 135 200/...201 gear lubricant, 0369.001.015 bearing lubricant and
      "quality cycle oil" for various pinion and moving part points.


      The SRAM iMotion3 hub is a completely different design from the T3. It features an
      inboard shift cable and is offered in freewheel, coaster brake, "iBrake" and disc brake
      models. The coaster brake model uses the historic Sachs "roller actuation".

      The iM3 shifts "backwards" from the T3 (and Sturmeys); a broken cable would put the iM3
      in low gear.

      The coaster and freewheel iM3s have a 130mm OLD; the disc model, 135mm.

      Add/correct information.
      PJ
    • Rich Wood
      Below are some additions for the SRAM gear hubs info. Rich Wood ... model. The freewheel and ... It has a quick disconnect ... bearing lubricant and ...
      Message 2 of 2 , Nov 30, 2008
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        Below are some additions for the SRAM gear hubs info.

        Rich Wood

        --- In Geared_hub_bikes@yahoogroups.com, "prester_john_in_cathay"
        <prester_john_in_cathay@...> wrote:
        >
        > The SRAM T3 is offered in a freewheel, coaster and drum brake
        model. The freewheel and
        > coaster have steel shells; the drum model, aluminum.
        >
        > The T3 requires no special tools to completely dis/re-assemble.
        It has a quick disconnect
        > shift cable and adjusts in 1st gear.
        >
        > SRAM specifies 0369 135 200/...201 gear lubricant, 0369.001.015
        bearing lubricant and
        > "quality cycle oil" for various pinion and moving part points.

        Specified input ratio is 2.0 minimum for freewheel and i-Brake
        versions. Input ratio range for the coaster brake version is 2.0 to
        2.4 for wheels > 20" and 2.0 to 2.5 for 20" wheels.

        OLD is listed as 117mm for the no brake version and 118mm for the i-
        Brake version. Coaster brake versions are listed for 118mm or 127mm
        dropouts.

        Sprocket range listed is 16 through 24 teeth.

        Weights:

        No brake - 911g
        Coaster brake - 1182g
        i-brake - 1554g with i-Brake

        Full specs for all versions are available in the SRAM gear hubs
        technical manual.
        >
        >
        > The SRAM iMotion3 hub is a completely different design from the
        T3. It features an
        > inboard shift cable and is offered in freewheel, coaster
        brake, "iBrake" and disc brake
        > models. The coaster brake model uses the historic Sachs "roller
        actuation".
        >
        > The iM3 shifts "backwards" from the T3 (and Sturmeys); a broken
        cable would put the iM3
        > in low gear.
        >
        > The coaster and freewheel iM3s have a 130mm OLD; the disc model,
        135mm.

        Also 130mm OLD for the i-Brake model.

        Input ratio limits are the same as for the T3 including coaster
        brake version high and low limits.

        Sprocket range specified is 16-18 tooth flat sprockets and 19-21
        tooth offset with the offset in towards the hub.

        Weights:

        No brake - 1120g
        Disc brake - 1210g
        Coaster brake - 1390g
        i-Brake - 1830g with i-Brake installed.
        >
        > Add/correct information.
        > PJ
        >
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