Yeah man i know its stock but what i meant by saying about the 50 profile was the tire wall flex...
i ran 195 - 55 R15 on my kosei K1 alloys and there was SOO much tire wall it looked like 4x4..
wasn't hating on your choice mate i was merely offering experience with those tires in that exact size thats all...
i'm sure you will love them.. just offering advise thats all bud.
also i nknow that fitting the incorrect tire can put your speedo out of sync, i'm sure this can be recalibrated though so its really not a problem.
Also i don't think it is 1inch less diamter i think it is -20mm of diameter...??
i use this chart its very helpful for things like this.
Tyre Size Calculator - Changing Tyres - Etyres