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Old 07-15-2012, 01:43 PM   #3
Track rat
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Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,687
Originally Posted by SlotCar View Post
Does anyone have experience running a "Square" setup with 17' 255/40's on all four wheels?
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.
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor
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