I run 17inch OZ superturismo WRC's and yes the handling isnt as good as a car on smaller wheels, altho I cant say theres much in it.
To be fair tho I have Teins aswell which have been specifically tweaked for the wheels in question to get the most out of them so may explain why the handling is decentish but the ride is still rock hard and many would say terrible, but then I like the feel of a go kart.
For all people slag 17's on Pulsars, I doubt many people actually push there cars to the limit on handling apart from the track slags :lol:, so if you want to run 17's then do it!