You can increase or decrease tire size, all are safe, as long as they are dot (department of transportation) approved tires. which 99% are. Are you lowering the car? If your wanting to keep the same wheels and have a lower profile tire there are a variety of tires your local tire dealer can give you options on, sport, all season, winter etc. It all depends on what application your wanting to utilize. One key thing to remember on all wheel drive cars is that all tires must be exactly the same in size or it will cause damage to the transfer case which is the major component of the all wheel drive system.
No, the Audi R8 is all wheel drive. It uses Audi's trademarked "Quattro" all wheel drive system.
She originally had a Black Audi S4 but she has now changed to a Audi Q7 White
The 2013 Audi S8 has all wheel drive.
The 2010 Audi Q7 has all wheel drive.
The 2015 Audi TT has all wheel drive.
The 2015 Audi TTS has all wheel drive.
The 2002 Audi S6 has all wheel drive.
The 2012 Audi A3 has front wheel drive.
The 2013 Audi A6 has front wheel drive.
The 2013 Audi A3 has front wheel drive.
The 2009 Audi TTS has all wheel drive.
The 2014 Audi S5 has all wheel drive.