Well it's been discussed many times, but heres and article from a reknowned MX5 Tuning book that is also applicable to us.
Please note the copyright is held by it's original author. Since I don't know who that is and we are very unlikely to buy an MX5 book anyway, I doubt it will be a problem.
If however you are the author and you woudl prefer this not to be available please let me know.
m http://www.mr2-roadster.co.uk/temphold/ ... 0Tyres.pdf (http://www.mr2-roadster.co.uk/temphold/Wheels%20&%20Tyres.pdf) m