ps2020

Right now I have 21" Summer tires and I want to change them to 21" All season tires. I checked car dashboard for tire settings it has 18-21" for Summer tires, 18- 20" winter tires and 18-20" All season tires.

Q1: If I switch to 21" all season tires, how do I adjust tires setting in Car computer? Can one add via Scanner? or just use 21" summer tire settings?

My rear tires are near end of life and front 2 are still good for another year. Would it work if I change rear 2 to all season or front 2 remain summer tires? Would it effect handling and How to adjust car computer, front for summer and rear for all season?

My cayenne is 2016 and still has original TPMS sensors. I don't think they last very long. I am thinking of changing them as well as cost is much less than going through change process.

Q: TPMS work with correct frequency which is 433Mhz for Cayenne. Would it matter, front 2 are different brand than newer in rear 2?

Most TPMS comes pre-programmed and you just need to activate them via scanner. Does Porsche computer picks up newer TPMS sensors after adjusting for newer tires and driving or one needs to get that TPMS data into computer via Scanner?

craig001

I would say just use the summer tire setting for the A/S tires. But I would also recommend just to replace'em all and be done with it. You are in TN so you do see colder temps and some summer compunds really suck below 40 degrees. Better afe than sorry IMHO. I have a couple of sets of 20" rims that don't fit the 2019 I jsut bought if you jsut want to do a whole new set of shes.

gonzoe11

+1 on the Summer tire setting for the A/S set. I would also swap out all TPMS sensors. Do it now on your tire swap and you'll be set for years.
I started having issues with my rears and the constant errors on the dash were driving me crazy.

RAudi Driver

I'm still on my original TPMS. 2011 Cayenne Turbo.

vwbrd

Yeah I run 21" A/S and it's frustrating that the only option is 21 Summer in the computer.