195/55's on a 15x8' wheel will require stretching the tire to fit, which isn't recommended for safety or performance.
+25 offset is on the aggressive side in terms of offset. Everyone's results will vary so adjusting the fitment/clearance will require some time. Ride height and camber adjustments may be needed to avoid rolling, but rolling the rear fenders might be required.
They might sit flush within the fenders and rear 1/4's but rub like crazy w/o a pull. I test fit a 15 x 8 +15 with 195-45-15's and stuck out about 1/2 and inch and had maybe 1 finger clearance with a 2 1/4 inch drop.