[the ambush]

hi ,
does anyone know if there is a weight reduction with the 19'' 2018 wheels compared to the 2015-2017 BBS 18''? if i remember right there was a appreciable reduction on weight going from the standard Enkei 18'' to optional BBS 18'' . just wondering if the new STI has lost an edge there?

 

[the ambush]

Personally, I've install brand new Japanese BBS RI-A 004 (18*8.5 5/114.3 +40) that a little more expensive than optional BBS from factory but far lighter (8.3 Kg each).

Those actually look like the 2015-17 BBS, dont they?

 

[the ambush]

My concern is mainly with acceleration. With no power increase, if you have a wheel for which its weight is farther from the hub because it is bigger (never mind being heavier), i imagine it will be harder to accelerate, plus need to consider also the possible reduced acceleration due to taller gearing by mean of bigger overall tire diameter.
I m no engineer but i think it needs
1- way lighter wheels to offset the fact that the wheels are harder to spin. And
2-the taller overall tire must be offset by shorter gears just to maintain same acceleration output.
But i m afraid none of the two has been taken care of.