will these fit on a 996 tt
fronts 19x8.5 53mm offset
rears are 19x11.5 62mm offset.

 

The fronts will be fine, but the rears will need 18-23mm spacers to make then fit right.

 

Great offset calculator at 1010tires.com: http://www.1010tires.com/WheelOffsetCalculator.asp

(No affiliation to me, I just use it regularly...)

 

Well since this thread is already there... dont mean to Hijack

Mine is a 996 C4S same as 996 TT... My Question is, my Factory Rear size is 18X11 45ET, what kind of Spacers would i need to Run a 18X10 46ET or do i even need a Spacer? Front Size are the Same, This is for Winter....

that makes no sense to me lols...

 

Zookie,
not sure if this was your question, but using the offset calc in link above says:

Inner Clearance: 12mm more (the inside of the wheel to the strut housing)
Outer Position: 14mm less (position of the outside edge of the wheel)

So, if you use those winter rims they will work "as is" but they will have less width and may look underwelming... Though I doubt it would be performance issue given that they winters.

Ideally, you may want 14mm (or nearest size to this) spacers.

 

is 14mm what i need to make the Wheels closer to the Fender? Winter size is 10" compare to 11"...