Quote:
Originally Posted by Big Windy
wrong. overall weight is only one factor. rotational intertia is the key principle. 19"s have greater rotational inertia because of the diameter of the wheel is larger. i'm not a physics geek, but it is incorrect to say that 19" will accelerate faster just given the fact that they are lighter than 18"s.
|
This doesn't make sense.....since the overall tire wheel package weight on the 19" is lighter and the overall height of the 19" is the same then the 19" will accelerate faster since its lighter??
http://www.miata.net/garage/tirecalc.html
Both the 18" and 19" tire-wheel package have an overall diameter of 26.3"... the overall diameter & radius are both exactly the same with only a slight difference in the circumference of .2" So
"IF" the 18" were significantly lighter or had a smaller overall diameter...say 25.0" then in theory they would accelerate faster...
__________________
Brian
2008 E92 M3, MR, DCT, extended BB leather, loaded!
1988 Porsche 928S4, Guards red/Champagne leather
1989 Porsche 928S4 track beast!!!