Most manufacturers publish tire dimensions on their websites. Looking at Dunlop's Q3 specs for instance, they're at:
High-Performance Dunlop Motorcycle Tires
The 190/55 is 14.7mm taller and only 3.8mm narrower than the 200/55. At 649mm tall, it's 7mm shorter than the OEM 200/55 Pirelli versus 21.7mm shorter which is where the 200/50 leaves you. You take half that difference to get the rear ride height change of course, since all that matters there is axle to ground. Easy enough to adjust out the ride height changes, but over 2cm of tire height is going to completely hose the TC.