After replacing the two cogs with a set of 12-14-16 on my 2019 Brompton I just modified the (new style) shifter to a friction type. I removed all the springs and index parts from the inside and thigtend the central screw in a way that the shifter stays in the selected position. Works so far for me.
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After replacing the two cogs with a set of 12-14-16 on my 2019 Brompton I just modified the (new style) shifter to a friction type. I removed all the springs and index parts from the inside and thigtend the central screw in a way that the shifter stays in the selected position. Works so far for me.