Shimano ST-RS505 2X left disc brake drop bar shifter lever to 3X?- Mtbr.com
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  1. #1
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    Shimano ST-RS505 2X left disc brake drop bar shifter lever to 3X?

    Can a Shimano ST-RS505 2X left disc brake drop bar shifter lever be converted to a 3X?

    I have a Sturmey-Archer CS-RK3 3spd IGH cassette hub 27.5 wheelset that I want to use on a Soma Wolverine frame with off-road drop bars. This internal rear hub 3spd works with a standard 3X front derailleur shifter, but the ST-RS505 disc brake set I have is 2X. Id like to use the left lever shifter for 3X if possible.
    Shoot your TV and turn off your CPUs, then get outside and start living!
    Banshee Paradox & Soma Wolverine 3spd Belt Drive

  2. #2
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    Any mechanics out there know if converting this 2X lever to a 3X lever is a 100% no go?
    Shoot your TV and turn off your CPUs, then get outside and start living!
    Banshee Paradox & Soma Wolverine 3spd Belt Drive

  3. #3
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    AFAIK, there is no converting Shimano brifters between 2x and 3x. Some older lower-end left brifters had a switch to go from 2x to 3x, but apparently this one does not. If it did, it'd be shown in the little use manual that comes with it. I believe you're SOL.

    https://si.shimano.com/pdfs/um/UM-07X0A-003-00-ENG.pdf
    Do the math.

  4. #4
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    Thanks. Dont need it for my current application, but was looking towards the future and its universality between my bikes and wheelsets. Only using the right 11spd with a Tanpan SH11 for a MTB Shimano XT long-cage derailleur 1X11 on current application; left is unused.
    Shoot your TV and turn off your CPUs, then get outside and start living!
    Banshee Paradox & Soma Wolverine 3spd Belt Drive

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