Thanks for that website. The tables and calculators where useful. I found an advert for a mk3 steelie and it has a 145/80/13 tyre on it (I'm guessing stock size), so as mine has a 185/55/14 it is correct to the table and only 0.54% out.

As for setting the clocks back, I could do with doing that as the spare set has 48k more on them (Scrap car 88k, my car 130k) xD