Tire sizes?

[FanIsHere]

(06-01-2016 08:08 PM)Bean Bandit Wrote:  I assume you are aware that the difference between a 195/50R15 on a 15x7 and a 185/60R14 on a 14x6 is 500g max per wheel&tire combo. Also with the above example that keeps your speedo about the same you wont lower the car in any way and therefore neither the car weight center... If your serious about saving unsprung weight then you need to drop some big cash on a set of TE37V (usually about 1-2kg less than the competition) and a custom brake setup... I personally have an AP big brake upgrade in the plans that should lower the unsprung weight by around 3kg per corner.
To make another example a set of alloy wheel hubs will save 1kg per side, if you want to go further the modception bigbrake kit will shed 2kg per side. These difference are disregarding the wheels themselves.

I was thinking something like Watanabe or SSR 14x6/6.5 which are near 5-6kg each. So the difference between the 14s and 15s will be around 3kg at each corner. That makes us 12kg!

On 14s I think that Willwood 4piston small brake kit fits easily or even RX-7 FC's brake calipers (not so sure).

As far as the height, the difference between 185/60R14 and 195/50R15 is around 1cm lower than the 15s! 185/55R14 are arround 2cm lower than the 15s!

I don't mind about the speedo btw.

But you made me think of keeping my KOSEIs as much as I can, until I find a set of good lightweight 14s! There are much more options on 195/50R15 tires too!