The EU ratings on tyres range from A to G for both fuel economy and braking distances.

All things being equal can someone tell me what the theoretical drop in MPG is between a 'C' and 'G' graded tyre?

Next question the braking distances. Obviously the shorter the distance the better, but how many feet are we talking between a 'B' graded Nexen Roadian and a 'E' graded Cooper LTZ?

Yes I know that all sorts of factors will impact upon the results but there must be some theoretical answers.
Ta, Chris. Travelling around in circles again.

http://www.tyre-shopper.co.uk/eu-tyre-labelling

Well that was quick and to the point! Looks like Nexens' are more fuel efficient and better in the wet than LTZ's
If only there was a tyre with the Nexen's ratings and the LTZ's ruggedness? Travelling around in circles again.