Why are 20's REQUIRED when going to PTV?
 

I noticed on the Porsche configurator that if you want to add PTV to the base model you have to get the 20" wheel option. Since they both (19 and 20 inch) have the same rolling circumference I'm curious as to why - anyone here know other than Porsche trying to run up the $$?

I know you get it with the S, blah blah blah. I'm asking the question out of pure curiosity.

i wish this wasnt so, they say there is a clearance issue inside the wheel but it's not true.. as far as touching or coming close... maybe they are just being super safe as far as snow buildup/etc..

i wish you could do with 19's otherwise it add's up fast

same reason why you shouldnt need 20's for sport pasm plus, and additionally shouldnt need ptv for sport pasm plus

PTV - Porsche Torque vectoring? Require 20" wheel?

I did place my order of base carrera 19" wheel with PTV Plus, PDK & PASM, no problem at all, the production is almost complete...