Bit of a thread resurrection just to make some new points I came across really.
I'm once again looking at tyres as it's getting to that time and the old Eagles vs RE070 debate has sprung up in my mind. I'm currently wearing eagles all around so was tempted to try something different.
Firstly, on Camskill in 225 format the tyre prices between the two seem to be the same give or take a couple quid. Not the £25 - £30 per corner difference it used to be.
Secondly, and what shocked me the most is the listed tyre weight between the two.
Tyre weight in pounds:-
RE070 - 26.52lbs per tyre
Eagle F1 - 19lbs per tyre!
That seems quite a difference when you consider that as unsprung weight.
I read somewhere that rotational mass can be multiplied by roughly 3 to give a better indication of the effects it has on vehicle acceleration when compared to standard/unsprung/ballast weight.
So on that basis, the 7.5lb difference per corner equates 30lbs saving overall. Multiplied by 3 its roughly the equivalent to 90lbs of sprung weight or 40kg's.
That's quite some difference considering you're only making a tyre choice I thought!