Just the opposite! It means while pedalling hard. Normally, to change gears, you need to ease off the pressure, similar to how you put down the clutch to change gears in a car. This can be awkward when trying to get moving from too hard a gear, or if you forgot to change gears before arriving at a hill.
What does “under pressure” mean? Does it mean shifting while stopped? I’m told some non-electronic belt drives can do that.
Just the opposite! It means while pedalling hard. Normally, to change gears, you need to ease off the pressure, similar to how you put down the clutch to change gears in a car. This can be awkward when trying to get moving from too hard a gear, or if you forgot to change gears before arriving at a hill.