Current car has 17" rims - car I'm considering buying has 19" - Both are A6 c7, though one is the Avant and the other is the allroad. 

I guess there might have to be a reprograme of the "brain", but any reason why not?

Ta

As long as you maintain the same overall diameter by fitting low profile tyres to the larger rims then yes it is possible. The disadvantage of low profile tyres is the much harsher ride and the possible need for different springs and dampers. Consult a professional for detailed guidance on the change.

Hello Rob,

Are you intending using tyres currently on the 19 inch wheels ( if fitted)? 
If so, you need to take into consideration that they are likely to be XL rated if off an Avant, can you car will end  up feeling every bump in the road. 
As long as you are aware of that, and the need to inform your insurers. 
Regards,

Gareth. 

Sorry not made myself clear - I want to remove the wheels & tyres off my old car (A6 C7 avant 2014) 245/45R18

and fit them to the new car 2017 A6 allroad. The dealer would then put the nice shiney 19" wheels & tyres on my car which they will be taking as p/x 

From what I have read 17" rims provide a better ride - hence my interest (not bothered by the bling!) - additional benefit is that I'm saving at least £50 a corner on replacement tyres.

HOWEVER...... 😁 I am no expert so if anyone has opinions about the relative merits of 17" rims and 19" rims do please put your views forward.... I am based in the far north, sometime roads not great. Comfoort and road holding more important than high speed boy racer handling... left my boy racer days 45 years ago 🤣

 

 

41 minutes ago, Canopy Locked said:

Comfoort and road holding more important than high speed boy racer handling... left my boy racer days 45 years ago 

Comfort and road holding are conflicting parameters when comes to tyre & wheel choice. High profile tyres on small wheels will generally give a more comfortable ride, but reduced road holding in corners.

Again I stress that the two cars may have different spring and damper rates. Changing the tyre/wheel combination without ensuring they suit the suspension could lead to dashed expectations.

11 minutes ago, cliffcoggin said:

Comfort and road holding are conflicting parameters when comes to tyre & wheel choice. High profile tyres on small wheels will generally give a more comfortable ride, but reduced road holding in corners.

Again I stress that the two cars may have different spring and damper rates. Changing the tyre/wheel combination without ensuring they suit the suspension could lead to dashed expectations.

Thanks, I think i'll just err on the side of caution and leave well alone. Now to see if I can do some sort of deal on the allroad - good start as it has a full audi s/h. 

Hello Rob,

When you say it has full Audi Service history, how many miles has it covered, and at what intervals has it been serviced?

Regards,

Gareth. 

Hi Gareth - I pulled off the electronic history and that shows annual servicing at Audi dealers for the 1st 6 years of its life. It looks like the 2nd owner hardly used it as there's a period from Aug 22 to Aug 24 (the MOT dates) where there is no =service or inspection recorded but it only covered 6000 miles in those 2 years according to MOT data.

This is further boune out by the advisory for the front brake disc/pads in the 2023 MOT. This advisory appeared again  in the 2024 MOT.

Around this time I guess it might have been sold (3 owners total) and the new owner probably had the brakes fixed as the next service was in Germany Audi Frankfurt in 2025 where they did the whole thing, incl the G/box service (42000 mile).

I'd have like to have seen the g/box service being done sooner, but I'm not too worried by that... (or should I be 😏?)

The MOT in Aug 25 shows that the advisories for the brakes are clear and the next service was in Jan 26 (oil).

To be honest I'm pretty comfortable that the history appears genuine.

The only things I'm not sure about service intervals for things like the ad-blue (never had it b4) and if the air suspension needs servicing from time to time. 

Perhaps the servicing questions are best discussed in a new thread, but I'll have a look see if there are any threads about this. 

I'm aware that the car computer will advise of service intervals, but I have always done shorter service intervals - Preventative maintenance is always cheaper in the long run.