Thanks for your replys.
After having these wheels for a few months now I think they affect performance.
As such I think performance is the most important thing with a 172/182,
so I'm going to buy 16" lightweight forged wheels,
I like the look of SSR type C wheels because they look solid and I like the ease of cleaning.
Odly these don't affect the speedo as I've measured the speed on a gps (phone and tom-tom).
Not planing on lowering the car, I've had lowered cars before (starlet GT, Paseo, Falcon GT) and there too harsh.