Originally Posted by
cubewheels
Either delay shifing to the small ring or upshift two cogs with the rear derailleur before going down to the small ring.
Delay shifting means you keep pedaling on the big ring well into the climb, allowing your cadence to fall until your cadence gets low enough before you drop to the small ring.
That is what I do and works fine with a bit of practice. If it is a steep change in incline, you can just hit it without changing gears and soft pedal until cadence drops a bit but stil fast enough to change into small ring. Then as you keep soft pedaling change into small ring and adjust with the rear if needed.
The other option speeds things up a little, if right before the climb you shift up in the rear, that means you don’t have to wait that long before the cadence is low enough to switch into the small ring.