Will these wheels fit my Boxster?
 

I am considering a set of wheels pictured below (Not sure if these are the lobster claws or not). They are from a late model Boxster S and my vehicle is a 98 Boxster. Looking for some validation if these wheels will be a direct bolt on, or will I need spacers. (Pictures, Offset and Part #’s of the wheels in questions listed below)

Front:
235/40 ZR18 | 8Jx18 | Porsche Part Number 987 362 13600

Rear:
265/40 ZR18 | 8Jx18 | Porsche Part Number 987 362 13800

Thanks in advance for your input.
http://986forum.com/forums/uploads01/21446558703.jpg

What are the offsets? You did not list them
Are you sure they are both 8" wide wheels and the rear tires are 264/40 not 265/35?

This thread is a little inconclusive,but has some more info on the wheels and includes the offset:
http://www.renntech.org/forums/topic/15074-boxster-s-987-18-rims-tires-on-98-boxster/

Apologies, this is what I have been able to find from the web.

18x8 (57) & 18x9 (43)

Porsche Part numbers:
987-362-136-00 18x8
987-362-138-00 18x9

Checking on the tire size as it is probably not listed correct either.

here is a good caculator that you can compare the factory wheels/tires and others
Rim & Tire Size Calculator. Custom Offsets - Wheel-Size.com
or
http://tiwing.com/wheel-offset-calculator/

The wheel width and of set should be cast into the wheels. It may be around the valve stem

Something you should be keenly aware of is the weight of the new wheels and rubber compared to your old ones, especially if you have to use spacers to get them to fit.

I have discovered the expensive way that fitting bigger heavier 18 inch rims on my 97 made it look great, but wore out the suspension parts prematurely not once but twice. And now I wonder what damage I've done to my wheel bearings with the extra weight on the hub.

Temper this comment with the fact that I bought aftermarket wheels and I think they're quite a bit heavier than factory Porsche wheels.

Placed a call into Suncoast and these wheels will not fit my Boxster. The search continues.

Had to pull out a dusty piece of paper I have with offsets & widths. Factory 986 dimensions are:

7.5x18 (50)
8x18 (52)

You can use that as your starting pt when looking at wheel offset calculators.

I believe in 98 18s were a factory option but they weren't in 97.