Spring Coming Need New Tire/Size Question A4 B8

[Godmyster]

Hey all,

So spring is almost here, I need to buy new tires, my summer rims are 19" I have a B8 Audi A4 2009 Quattro 2.0T, I had 235/35/19 and I didn't like it at all, when I bought them I think the guy at the shop that sold them to me told me I could do bigger sizes I don't want to do "35" anymore its too low profile and I feel everything on the road I wanted to jump to "40" but I cant recall what sizes I can go for my car, also keeping in mind mine has quattro, I think he said something about mine also have quattro has something to do with the tire sizes. I just don't remember it was 3y ago.

Does anyone know for sure what sizes I can do exactly on my car?

[gk1]

Do you have OE 19" wheels or aftermarket?
If they are OE wheels then the problem is someone replaced the tires with something too small hence the poor ride.
I believe your stock size should be 255/35R19 on the stock 19x8.5 ET43 wheel.
By going to a 235/35R19 they dropped your overall diameter by more than 2% and you lost 8% of your sidewall height compared to stock. This would be noticeable. However, if you still feel you want to go to a "40" series then you would be best served by stepping down to stock 18" size which is 245/40R18, but if you must retain your 19" wheels then a 235/40R19 is within 1.4% of original diameter and gets you 5% more sidewall than stock and 14% more than you have currently. It will just be a tad stretched on the 8.5" wide wheel, but if that does not bother you currently then no issue.
(Note: Remember "35" is a ratio of width to sidewall height. So the wider tire you get that fits the rim properly the more sidewall height you will have. ie. a 255/35 has almost the same sidewall height (cushion) as a 225/40.)
If they are aftermarket wheels, what width are they, if they are 8" wide that might be a tad too narrow for a 255 and might be why a 235 was chosen instead, not sure.

(Unless things are different in CA than US but I believe they are same NA models.)

[Godmyster]

Hey all,

So spring is almost here, I need to buy new tires, my summer rims are 19" I have a B8 Audi A4 2009 Quattro 2.0T, I had 235/35/19 and I didn't like it at all, when I bought them I think the guy at the shop that sold them to me told me I could do bigger sizes I don't want to do "35" anymore its too low profile and I feel everything on the road I wanted to jump to "40" but I cant recall what sizes I can go for my car, also keeping in mind mine has quattro, I think he said something about mine also have quattro has something to do with the tire sizes. I just don't remember it was 3y ago.

Does anyone know for sure what sizes I can do exactly on my car?

does anyone know if I can put 235/40/19 or 245/40/19 on my car?

[Godmyster]

Do you have OE 19" wheels or aftermarket?
If they are OE wheels then the problem is someone replaced the tires with something too small hence the poor ride.
I believe your stock size should be 255/35R19 on the stock 19x8.5 ET43 wheel.
By going to a 235/35R19 they dropped your overall diameter by more than 2% and you lost 8% of your sidewall height compared to stock. This would be noticeable. However, if you still feel you want to go to a "40" series then you would be best served by stepping down to stock 18" size which is 245/40R18, but if you must retain your 19" wheels then a 235/40R19 is within 1.4% of original diameter and gets you 5% more sidewall than stock and 14% more than you have currently. It will just be a tad stretched on the 8.5" wide wheel, but if that does not bother you currently then no issue.
(Note: Remember "35" is a ratio of width to sidewall height. So the wider tire you get that fits the rim properly the more sidewall height you will have. ie. a 255/35 has almost the same sidewall height (cushion) as a 225/40.)
If they are aftermarket wheels, what width are they, if they are 8" wide that might be a tad too narrow for a 255 and might be why a 235 was chosen instead, not sure.

(Unless things are different in CA than US but I believe they are same NA models.)

I have 235/35/19 i have aftermarket rims of course and just wondering if there is any consequences by going 235/40/19 or even 245/40/19, the reason why is because what i have atm 235/35/19 is to low profile meaning i feel every bump and the tire is a little stretched if that makes sense.

[gk1]

I have 235/35/19 i have aftermarket rims of course and just wondering if there is any consequences by going 235/40/19 or even 245/40/19, the reason why is because what i have atm 235/35/19 is to low profile meaning i feel every bump and the tire is a little stretched if that makes sense.

What is your aftermarket wheel spec 19x? ET?

[Godmyster]

What is your aftermarket wheel spec 19x? ET?

im pretty sure its 8.5

[gk1]

im pretty sure its 8.5

Um, ok well....19x8.5" ET(unknown)
Still, I think someone steered you wrong by putting 235/35/19 tires on there and is why you don't like the ride quality.
I'll put it in list form, maybe that will help.

Your current tire.
235/35/19 = 82 mm sidewall

The correct tire size for your car. (I think.)
255/35/19 = 89 mm sidewall (8% larger sidewall) (This will improve your comfort.)

The two options you seem to be most interested in for some reason even though IMO they are too small for an 8.5" wide wheel and offer less traction (both motive and stopping).
235/40/19 = 94 mm sidewall (perhaps your best bet if you are looking for the most comfortable ride.)
245/40/19 = 98 mm sidewall (overall diameter will be over 2% larger than stock...not recommended)

Also don't forget tire pressure plays an important role in comfort. I'm not sure how it is in CA but in the US the sticker in the door is for MAX load air pressure and would be too high for driving just one or two people. You have to follow the inflation pressures in the manual for minimal load.

[Godmyster]

Um, ok well....19x8.5" ET(unknown)
Still, I think someone steered you wrong by putting 235/35/19 tires on there and is why you don't like the ride quality.
I'll put it in list form, maybe that will help.

Your current tire.
235/35/19 = 82 mm sidewall

The correct tire size for your car. (I think.)
255/35/19 = 89 mm sidewall (8% larger sidewall) (This will improve your comfort.)

The two options you seem to be most interested in for some reason even though IMO they are too small for an 8.5" wide wheel and offer less traction (both motive and stopping).
235/40/19 = 94 mm sidewall (perhaps your best bet if you are looking for the most comfortable ride.)
245/40/19 = 98 mm sidewall (overall diameter will be over 2% larger than stock...not recommended)

Also don't forget tire pressure plays an important role in comfort. I'm not sure how it is in CA but in the US the sticker in the door is for MAX load air pressure and would be too high for driving just one or two people. You have to follow the inflation pressures in the manual for minimal load.

Wouldn't 255 be very wide?

Also put into account my car also has quattro, I've heard there is certain sizes I cannot put on my car.

and why is it that I can put 255/35/19 but 245/40/19 isn't recommended, this is where I am trying to understand when on isn't as wide as there other...

[gk1]

Wouldn't 255 be very wide?

Also put into account my car also has quattro, I've heard there is certain sizes I cannot put on my car.

and why is it that I can put 255/35/19 but 245/40/19 isn't recommended, this is where I am trying to understand when on isn't as wide as there other...

Do you know what the stock size was supposed to be on your car?
As long as you have at least an 8.5" wide wheel 255 width is fine.
You can do whatever you want if you like...However, if your stock size was supposed to be 255/35/19 a 245/40/19 is a 2.6% larger diameter than stock and it is generally not recommended to have a larger than 2% diameter difference from stock.
Things you've heard and things other people have told you I have no idea. I can only speak to what I know.
You are welcome...and sorry... I'm not sure I can help you any more than I already have without some exact details and specs, not guesses.
Good luck.

[Godmyster]

Do you know what the stock size was supposed to be on your car?
As long as you have at least an 8.5" wide wheel 255 width is fine.
You can do whatever you want if you like...However, if your stock size was supposed to be 255/35/19 a 245/40/19 is a 2.6% larger diameter than stock and it is generally not recommended to have a larger than 2% diameter difference from stock.
Things you've heard and things other people have told you I have no idea. I can only speak to what I know.
You are welcome...and sorry... I'm not sure I can help you any more than I already have without some exact details and specs, not guesses.
Good luck.

thank you very much gk1 for all the help :) I really appreciate it.

[Godmyster]

Ended up going with 19/35/255 on firestone indy 500 and its great so far thank you for the help.