I am getting a new set of aftermarket wheels..........should I use the factory one or should I buy a new set from Porsche? Actually can I still buy those form Porsche? Any and All advise would be appreciated

 

And what is the question about the tire monitoring system?

 

RDK is ancient tech, if you don’t run your stock wheels you will have to by-pass the RDK system.

 

+1 My RDK is actually fully functioning on my '93 GTS. The '90 GT has maybe three wheel sensors that are bad. At $400+ each, I bypassed the system.

 

Great! Thank you!

 

Intersting. What was the failure mode of so many sensors? Though old technology, I find the system quite robust.

Consequently, I would not just delete the system, if you are using factory wheels. I know for a fact that stock wheels are still available.

Now, if you just want bigger non-stock wheels, then you are basically obliged to bridge the system.

 

I am not aware of a modern TMPS system that will plug-and-play with the TPMS display that is in ‘89+ clusters.

The TMPS system of the 928 - called RDK - relies on having two ~1 inch holes in each wheel barrel in which one-half of the “sensor” system in mounted. The rest of the system is mounted on each corner of the suspension. It is the automotive equivalent of a vacuum tube-based computer.