255/35/19 tyre pressures

[gman11]

I finally found out tyre pressures as well. Contacted the shop where the alloys were purchased from. 2.2 bar for front and 2.1 bar for back

[wildbore]

Interesting. Standard 225/50/17 speedo deviation @ 100km/h is 5.7km/h. My 255/35/19 speedo deviation is 0.7 km/h. So the 19's are more accurate showing on the speedo as opposed to the 17's.

Tyre suspension comfort is obviously better on the 17's, but I can live with that. Who would have thought it eh?

Current standard 17" tyre is a 225/55, not 225/50 Have they changed fitment since your car was made? Could you post a pic of the tyre pressure label that is fitted to your car? that should really tell us everything we need to know.

[gman11]

Ooops, you are quite right. -2.7 speedo deviation on the 19's

[GrolschUK]

Current standard 17" tyre is a 225/55, not 225/50 Have they changed fitment since your car was made? Could you post a pic of the tyre pressure label that is fitted to your car? that should really tell us everything we need to know.

Fitment hasn't changed
I've just found a copy of the pre-FL brochure that I had downloaded last year.

Standard wheels are:
SE - 17" 225/55
S-Line - 18" 245/45
BE - 20" 255/35
Hybrid - 17" 225/55
S6 - 19" 255/40

With every 'optional' wheel showing the same tyre size per rim as above.


So as long as your car is a 2011- C7, your new tyres to go on your new 19" rims need to be 255/40... and the pressures will be as per the sticker on the door.
If you stick with your choice of 255/35, every 10k miles your car thinks it has done, it will have only actually travelled 9.6k, as well as other things being out of alignment.

[gman11]

New tyres needed methinks..........Thx for your input everyone.

[Clauuualc]

The setup that you have is like the C6 A6.

The C6 has smaller wheels than the C7. I also have a 2.0tdi C7 and run 19" on it but 255/40 R19. My friend has a C6 and runs 255/35 R19.