Wheels again (sorry)

[plewis66]

This question has been answered, I know it, but I just can't find it anywhere by searching the forums...

My 350i has 205 60's on 7Jx15 inch rims.

If I were to change these for 17inch rims, how would I work out the correct tyre profile to keep (as close as possible) the same rolling diameter?

[Terminator]

I find this site to be a very useful source of information

www.chris-longhurst.com/carbibles/index.html?menu.html&tyre_bible.html

[shpub]

Tyre size and equivalence spread sheet and tables in the Tyre FAQ on my web site

www.tvrbooks.co.uk