• Its close but no where near where it should be, good 5mm on each side roughly. Cant physically open them up anymore, calipers are already touching each other. Im baffled?

  • I meant let some cable through, so the arms are set wider apart.

    I found that if the arms are set close to the rim (so they have a very small range of movement), then friction in the cable-run (that's a tight bend when the cable leaves the lever and goes down the arm) can be enough to overpower the spring.

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