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Thread: SM-BTR2 cable?

  1. #1
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    SM-BTR2 cable?

    I was preparing my bike to ship, when I removed the seat post the battery became disconnected. Iím guessing when I ordered the 6870 internal group it came with a short battery cable. I donít know how the shop managed to install the group but I need a longer battery cable. Is the PN of the cable the same as all the other cables just longer. Iím guessing I need 1000mm.

    Now that I yanked the battery out, should that have damaged anything and will I need a special tool to disconnect the short cable and install a longer one?

    Thanks

  2. #2
    'brifter' is a lame word.
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    There is a special connect/disconnect tool, it's not absolutely necessary but you reduce the chance of screwing up a wire/connector if you use it. You will likely need to pull your crank and bottom bracket out of the frame to get to the b junction box but it depends on the frame.
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  3. #3
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    I pulled the crank out and ordered the BB tool. Are all the wires the same basic part numbers and then you specify length?

  4. #4
    Adorable Furry Hombre
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    Quote Originally Posted by jtompilot View Post
    I pulled the crank out and ordered the BB tool. Are all the wires the same basic part numbers and then you specify length?
    Yup. part number is SM50. For a seatpost battery cable you probably don't need 1M of cable for that cable.

    Did the cable come disconnected from the battery or the junction. If you have a long pair of tweezers, you could probably get the cable fished out of the frame so long as it is still connected to the junction.
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  5. #5
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    If you can get the cable close enough to the to of the seat tube, you could use the EW-JC200 two port junction with a second shorter wire going to the battery.

    Or, alternatively, you could install the EW-WU111 two port wireless unit in place of the junction if you don't already have a DFly/Bluetooth unit.

    I've use a piece of wire coat hangar with the end bent in a tight V shape to get the wire pulled up to the top of the seat tube.

  6. #6
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    Thanks everyone. Turns out the mechanic who installed the group installed the junction box facing the wrong way. The seat tube battery wire was facing up the down tube. After I repositioned the junction the battery cable was plenty long enough.

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