18" to 19" wheels

[hqduong]

Originally Posted by porsche986spyder

I think he is right. I too share this belief. It all has to do with adding more weight to the rear hub and flywheel. The lighter the rim, the less weight put on both and you can usually feel the difference in pick-up. So unless you can find a super light-weight rim that is still 19" you will be adding more weight and stress to the rear axle. I choose the 18s with a lowered stance for better handling and looks. When I owned a Mazda RX7 and had 17" racing rims on it and then switched to 19"s just for looks, I noticed a significant loss in pick-up and torque. So ever since I bought my Boxster, I swore I would not go over 18s. Hope this helps. Cheaper on your wallet too, since we cannot rotate the tires front to back like other cars. And you will go through rear tires fast if you are a daily driver.

Actually this has to do with highschool physics of "Rotational Inertia". Wikipedia this

When putting more mass outside rather than inside, it takes more time to slow it down and also to speed it up. i.e. More metal rather than rubber with 19 rather than 18s.

It's similar to an figure skater, you see how they pull their arms inwards when doing a spin? It makes them go faster.

[hqduong]

Also keep in mind, in reality, Rims should only be enough to accommodate the brakes. Enough to cool it down. If don't care about performance, and looks, get bigger rims. If performance is critical, then smaller size.

[aussieboxy]

I have 18 x 10 with 285 Perelli's on the back of mine and they fit perfectly just on the edge of the grear guard. My car had standar suspension & I have no issues with rubbing.

When I got the car it had 16"'s on it and I could definately tell the difference in reduced acceleration when I put on the 18"s. But it looks a hell of a lot better so I suppose it's a trade off. 285's look great from the back, gives the car that fat bum look.

[BOXZING]

Originally Posted by aussieboxy

I have 18 x 10 with 285 Perelli's on the back of mine and they fit perfectly just on the edge of the grear guard. My car had standar suspension & I have no issues with rubbing.

When I got the car it had 16"'s on it and I could definately tell the difference in reduced acceleration when I put on the 18"s. But it looks a hell of a lot better so I suppose it's a trade off. 285's look great from the back, gives the car that fat bum look.

What is the brand of your wheels and where did you buy them They look great.