17' Square Tire & Wheel Setup
 

Does anyone have experience running a "Square" setup with 17' 255/40's on all four wheels?

http://986forum.com/forums/boxster-racing-forum/31915-boxster-spec-allows-245-40-17-square.html


http://986forum.com/forums/boxster-racing-forum/33113-non-staggered-wheel-setups.html

Yep, I have run this setup periodically since 2009 as have most Texas SPBOX drivers. What do you want to know?

My impressions:
More ultimate cornering grip.
Tires can be moved around to all 4 corners to maximize life.
Brake bias moves forward so the car tends to duck more in braking zones. Front brakes overheat more easily and wear out faster.
A bit slower on long straights. (more un-sprung weight/rotational mass and windage)
Is it faster? Maybe in AX, not in my car on the track.

Like topless I run it in my SpecBox. I honestly can't say I find any difference worth talking about. If anything I feel like the steeing feel quality deteriorates. I do it so I can move my tires front to back witch saves a little cash. What have you got in mind?