The spokes are hollow and one of the simplest ways to determine whether the wheels are solid or hollow spoked is to feel the backs. The hollow spoke wheels are smooth - just like the fronts although they are flat rather than curvy. Solid spokes have two definite ridges on either side of each spoke and have a much thinner profile.
The part numbers 993.362.136.00 (front) and 993.362.140.00 (rear) are close to £4,000 new from Porsche which is a massive rip off, but I couldn't drive the car with the fakes on. The wheels suit the car so perfectly, these are some of my favourite views.
Rear 3/4 - One of the best angles in my opinion