Hey, stumbled across this tyre calculator. It allows you to compare the different sizes of tyre/alloy with your original dimensions and calculate the change in speed on your speedo. Might be a repost (sorry if it is) but still it'll be useful for those changing wheels.
Miata.net Calculator
Older one - Use this if the new one isn't working for you
If you want to post the definite dimensions of the original tyres for any Clio then feel free, I would but I would hate to get one wrong and have someone buy the wrong sized tyre or something silly.
Also here is another tyre calculator which is a bit less comprehensive.
ETyres Calculator
Miata.net Calculator
Older one - Use this if the new one isn't working for you
If you want to post the definite dimensions of the original tyres for any Clio then feel free, I would but I would hate to get one wrong and have someone buy the wrong sized tyre or something silly.
Also here is another tyre calculator which is a bit less comprehensive.
ETyres Calculator
