Could you run a longer gear cable and loop it inside of the brake cable?
^This
Here's my Allez showing much bigger loops of gear housing than you have (they just overlap in front) and that's shorter than how it was supplied from stock.
@dubtap started
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^This
Here's my Allez showing much bigger loops of gear housing than you have (they just overlap in front) and that's shorter than how it was supplied from stock.