Just FYI is all,
FWIW, Michelin does make a Pilot Power in a 190 / 55 size. I just mounted 1 up last week. What happened was Michelin didn't make it in a 55 at first, but did start producing them about 6 months ago. Most shops don't know this. When they go to their catalog to look, they don't see a part# for the 55. But it is available.
Pilot Power 2CT's have always come in a 55 size, but the 2CTs have very hard sidewalls where the Pilot Powers have a real soft sidewall that I prefer on a street bike.