What size tyres does this car have - 2004 Audi allroad

I'm assuming this is about a rim size for a tyre? The tyre pressure will depend on a number of different things. The tyre size that is fitted, the vehicle it is fitted to, the weight it regularly carries and the average speeds the tyre has to cope with.
Most modern cars and trucks have a plate somewhere on the car giving the tyre size and recommended pressures for light load and fully loaded. It is often on a hidden panel.
Starting with the driver's door, open each door in turn and look at the area normally hidden by the door when it is closed. Also check inside the fuel filler cover.
There are plenty of online sites where you can look the pressures up if you have the vehicle and the tyre size.

typo there same tyre sizes
geerally on all cars
tyre placard sticker somehwere on the chassis
or glove box owners book
says what size tyres are suggested

All tire sizes are indicated on the tires themselves.

The wheels could have been changed on the car from the standard original factory set and hence the tyre size may not be the standard factory original size.
The size of the tyres on the vehicle now is moulded into the side wall of the tyres and is easy to read.
Check all 4 tyres because larger size tyres may have been fitted as a pair to the rear.

The size might read - for example 245 45 18 or 235 45 17 (there are a huge number of sizes for each model of tyre).

The first 3 numbers are the width of the tyres in mm eg 225 mmm or 235 mm and so on. The second 2 numbers are the tyre profile size or ratio (which can be 70 65 60 55 50 45 40 and so on. The third number is the wheel diameter size. If you have 18 inch wheels on the car the tyres will read 18 or if they are 17 inch wheels the tyres will read 17 and so on.

If you post your present tyre size (on the tyre wall), then we can offer you a suitable larger replacement diameter size.
The simple answer to your question is yes, you can increase the size of your rims, and lower the profile of your tyre to compensate.

The other thing I'd mention as most people who don't know much about tyres don't consider this, is that when you reduce the height (wall) of a tyre by increasing the rim size, then you change two primary characteristics of the tyre's performance.


1: Tyre wall stiffness. Simply put, the shorter the tyre wall, the stiffer the tyre is when cornering. This can be a positive thing and can reduce the amount of body roll, whilst increasing the tyre's contact with the road.
2: Suspension. The tyre wall offers suspension to the vehicle. Yes, it's not just your springs and shocks which absorb the bumps from the road. By reducing the tyre wall height, you will effectively reduce the suspension capability of the tyre and it will become less forgiving on road surfaces.
It's because of these two reasons above that manufacturers try different combinations to deliver the best overall satisfaction rating to the type of customer who is going to drive that type of vehicle.
It is therefore typical that to many people, changing the rim and tyre size will not always have a positive effect.
In fact most customers who request rim size upgrades, according to my own experience are only interested in the appearance of the wheel, but are often disappointed with the results in performance.
This is why I always find it prudent to mention these points to anyone considering a rim size increase.

Rim size increases, because resulting in less tyre suspension actually increases shocks to the chassis components, and will also tend to reduce the life of these components.


So just be aware of what you face, when making this decision.

What pressures are you running in the tires that are giving you the problem?

two tyres the same size on the same axle ,is needed ,then its ok,

look on the side of the tires on thr car you will see Numbers like (225 r70 15 just example) these numbers are the tire size are the tire size as far as the make its up to you

. M&S means mud and snow rated tites, this will be on the body of the tire.