Wheels and Tires

No matter how much I scrub and no matter what solution I use, my tires still have a brown coating after washing.  How can I clean my tires?

My car is a standard 2016 Cayman 6 speed with 19 inch wheels.  

I just purchased a 2014 Cayman S from a dealer 70 miles from home. Will I cause damage to the summer tires if I drive it home when the temperature is below 40 degrees, and how much traction loss will I have ?  I do not plan to drive it in winter.

Bob F.

Please advise best tires for my Cayman S for daily driving.

I just bought a 718 Cayman S.  It came with 20" wheels (8" wide in front and 10" wide in rear.)  Friends and enthusiasts are telling me I need to get a second set of wheels to be able to have tires for the track and tires for everyday and winter.  I found a set on the PCA classifieds but the rear wheels are 11" rims.  My car came with 10" rims.   Does anyone know if I can put the 11" rims on my car?  The offset is different so it seems most of the extra inch will be inward, not outward.

Hi

Looking for advice on replacing brake pads and tires

I bought a 2009 Cayman (base) in June 2016 with 36K miles.

i have added 4K miles in the last year, some of it on DE days and autocross.  The pads will need replacement soon and the tires later.  I believe I have OE pads and OE drilled rotors.  Rotors look good to my untrained eye.

I am looking for a compromise street and track pads and tires.  I am not interested in changing out pads or tires for an event.  

A swap Panamera wheels front 19X9 et 60 with 255/45/19 tires, rear19X10 et 61, tires 285/40/19 will fit to 2007 Cayman S, will effect the performance, understeer or oversteer, or i can swap the tires to 255/35/19 front, 285/30/19 rear

my tpms shows on the dash display that i have a flat tire and will not reset.  All of the tire pressures are incorrect and show 5 to 10 pounds lower than actual.  I assume the batteries are dead in the wheels.  Can i bypass the tpms?  I check my tires frequently and don't feel like i need the system.  Thanks.

Are non staggered 987 Cayman wheels (245/45/18) compatible with a 981 Cayman S?

If the above is not true, are 981 non-S and S model wheels compatible? Tire rack is displaying different wheel-tire options for the non-S and S models. 

Thank you!

Problem:  2016 Cayman S (10,976 miles) makes a rubbing/knocking noise backing up at low speed with the wheel turned sharp left/right.

No repairs or modifications have been made to the car since taking delivery on February 11, 2016.

Questions:

1. What is causing this noise?
2. Is this normal?
3. Does this present a safety problem?

Thank you for any insight/advice you can provide.

pd.