Michelin Energy E3A or smaller Goodyear.

[slowly slowly]

The Michelin Energy E3A tyre is supposed to give about 5% better fuel economy.
The 195x65x15 Michelin E3A costs £10 more than Goodyear Hydra-grip so thats £40 more for 4 tyre.
Would you save enough to pull back that £40?.
What i would like to know is, if you bought 185x70x15 tyres instead of 195x65x15 would you save 5% on fuel because you are creating less friction?.

Surely not all make of tyres give the same ammount of grip so a excellent 185 tyre might give more grip in an emergency than an average 195 tyre.

[slowly slowly]

StressedDave said:

As for 'grip' theres very little difference in grip (measured as sliding friction rather than things such as cornering stiffness) for most tyres (the R-type tyres like the Dunlop SSR or Pirelli P-Zero C tend to have around 20% more grip than 'normal' tyres). I doubt you'd be able to tell any difference - especially on road where you won't be licking the edge of the performance envelope.

So are you saying that a Dunlop or Pirelli quality tyre has 20%more grip than a normal tyre of equivalant size, if thats the case would 2 identical cars one on Dunlop 165`s (example only)and another on cheapo 195`s go "round the track" in the same time.

Like you say the only time you might be "licking the envelope" is in an emergency stop and i can`t remember the last time i did one.

If this was the case surely 165`s would give you better mpg than 195`s with the same amount of grip.