I've just bought some new 18" wheels as my standards are kn ckered! Anyway I need some tires for them. Would 225/35/18 be OK or would that give too much difference on my speedo, etc?

They are these ones by the way..http://images.google.co.uk/imgres?imgurl=http://www.tyresave.co.uk/alloypix/big/t12.jpg&imgrefurl=http://www.tyresave.co.uk/alloymil.html&h=371&w=384&sz=24&tbnid=3CO0brtledYJ:&tbnh=114&tbnw=118&start=1&prev=/images%3Fq%3Dmille%2Bmiglia%2Bt12%26hl%3Den%26lr%3D%26safe%3Doff


....something different than the normal 5 spokes, and I like them which is all that matters.

website

http://www.canadiandriver.com/tools/tirecalc/tirecalc.htm

Cheers guys that was really helpful! Do most members go for 225/40/18 because it gives a slightly larger diameter and fills the arches a little bit more?

yes mate 225/40/18