Audi_A6_Quattro
21-05-2015, 09:20 PM
Hi Guys
My question is regarding 2009 Audi A6 3.2L Quattro (it’s 2009 but production of 2008 so it’s the pre-facelift) with factory installed 255/35R19 tires and 8.5jx19 ET48 wheels. The car also has option 1BE which is the sport suspension.
I just bought the car last week and I must change the tires because they are in terrible condition. The original owner said he had difficulty finding this tire size and upon searching at the main traders, I also didn’t find it. I also think the wheels might have some defects because there is vibration and noise above 100 km/h. Roads here also have many pot holes or horizontal lines so the ride isn’t really nice with such a heavy car and low profile tires. I am currently driving an A4 B8 with standard suspension ad 225/55R16 tires and to be honest I don’t feel the “comfort” of the A6 at all !
For that, I will buy new 18” wheels as the 18” tires is commonly available here for BMW and Mercedes Sedans. My current wheel is 4f0601025BA with ET48. I bought the wheel 4F0601025AL (which is 8.5j ET46).
The tire size available widely here is 245x45 R18, because it is used on the 5-series. The car catalog indicates that at 18”, the tire size is 245x40 or 255x40. I made some calculations and came up with the following :-
The outer tire diameter of my 255x35R19 : 661.1mm
The outer tire diameter incase of 245x40R18 : 653.2mm (less) - not available
The outer tire diameter incase of 255x40R18 : 661.2mm (exact match) - not available
The outer tire diameter incase of 245x45R18 : 677.7mm (little more) - available easily
My questions are :-
A- Has anyone tried the 245x45R18? Would it fit? Do you have pictures?
B- Is there a concern about rubbing? The addition in diameter is 677.7 – 661.1 = 16.6mm
C- Will I be at risk to damage anything in the suspension or struts by using such a profile (45)? since I am changing the "unsprung mass"
D- What are the differences between the sport suspension and the standard one? Because I am suspecting the A6 must be much more comfortable than this !!
My question is regarding 2009 Audi A6 3.2L Quattro (it’s 2009 but production of 2008 so it’s the pre-facelift) with factory installed 255/35R19 tires and 8.5jx19 ET48 wheels. The car also has option 1BE which is the sport suspension.
I just bought the car last week and I must change the tires because they are in terrible condition. The original owner said he had difficulty finding this tire size and upon searching at the main traders, I also didn’t find it. I also think the wheels might have some defects because there is vibration and noise above 100 km/h. Roads here also have many pot holes or horizontal lines so the ride isn’t really nice with such a heavy car and low profile tires. I am currently driving an A4 B8 with standard suspension ad 225/55R16 tires and to be honest I don’t feel the “comfort” of the A6 at all !
For that, I will buy new 18” wheels as the 18” tires is commonly available here for BMW and Mercedes Sedans. My current wheel is 4f0601025BA with ET48. I bought the wheel 4F0601025AL (which is 8.5j ET46).
The tire size available widely here is 245x45 R18, because it is used on the 5-series. The car catalog indicates that at 18”, the tire size is 245x40 or 255x40. I made some calculations and came up with the following :-
The outer tire diameter of my 255x35R19 : 661.1mm
The outer tire diameter incase of 245x40R18 : 653.2mm (less) - not available
The outer tire diameter incase of 255x40R18 : 661.2mm (exact match) - not available
The outer tire diameter incase of 245x45R18 : 677.7mm (little more) - available easily
My questions are :-
A- Has anyone tried the 245x45R18? Would it fit? Do you have pictures?
B- Is there a concern about rubbing? The addition in diameter is 677.7 – 661.1 = 16.6mm
C- Will I be at risk to damage anything in the suspension or struts by using such a profile (45)? since I am changing the "unsprung mass"
D- What are the differences between the sport suspension and the standard one? Because I am suspecting the A6 must be much more comfortable than this !!