Tire Size Question

[NYSpeedRacer]

My neighbor has a set of Michelin Pilot Sport 2 from his Panamera sized 255/40ZR20 Front / 295/35ZR20 Rears.

I see most guys run 35 or 30 Fronts and 30 or 25 Rears. Would I be able to mount this on my A5 without rubbing? or are the tire profile too high?

The car would be dropped using HR OE Sport.

I reside in NYC, so a slightly higher profile would be a good thing & plus he's practically giving them to me.

[B6UltraSport]

Best option is to test fit and find out! Goodluck

[DeMOROlized]

My neighbor has a set of Michelin Pilot Sport 2 from his Panamera sized 255/40ZR20 Front / 295/35ZR20 Rears.

I see most guys run 35 or 30 Fronts and 30 or 25 Rears. Would I be able to mount this on my A5 without rubbing? or are the tire profile too high?

The car would be dropped using HR OE Sport.

I reside in NYC, so a slightly higher profile would be a good thing & plus he's practically giving them to me.

About 8% too big. Way beyond what is usually recommended, which is +/- 2-3%.

[NYSpeedRacer]

Is there an app for me to find the tire difference percentage?

Do you know what would be the largest/widest staggered setup I could run and still be within the 2-3% range?

[mr shickadance]

total rolling diameter difference is within the 3-4% threshold, but 1) do you have 20 inch wheels already? and 2) are they staggered?

if not then then those tires will 1) not fit and 2) look silly

[NYSpeedRacer]

Yup, I got a set of 20x10 and 20x11 coming in. What tires would you guys recommend?

[mr shickadance]

well thats the thing, its very subjective, do you want to have a stretched tire look? or are you going for a more meatier looking tire?

tyrestretch.com is a good website that is a collection of pictures from tires and wheels, it may not be the wheel that you want, but it helps give you an idea of what a certain tire will look like roughly on the wheel


the idea behind a staggerred set up on quattro is that you want to have the rolling diameter of the wheel within 2-3% of eachother, the closest you can get to 0 the better.

also miata.net has a great tire calculator that will help you determine how close to 0% difference you can get


google both of those sites, you will find your answers within 5-10 minutes tops

[mxrz]

Is there an app for me to find the tire difference percentage?

Do you know what would be the largest/widest staggered setup I could run and still be within the 2-3% range?

Here you go: http://www.1010tires.com/TireSizeCalculator.asp

Enter 255/35-19 for stock size, and stay under 3% from that.

[mr shickadance]

^^ ughh, thats not entirely correct, staying within stock tire size means nothing, its all relevant to the rolling diameter of the two staggarred tires


i kno i kno i kno, i already heard your rebutle about the ABS, and the safety of going over the stock tire size, however, the truth it really does not mess with your system all that much outside of having a speedometere that will read slightly incorrectly, the real difference to watch out for, is the % delta of the rolling diamter of tire A and tire B.


while its good to try and stay within the stock tire percentage, as your rim diameter increases, you end up having tpo sacrifice tire sidewall to do so, which inturn makes you ride quality shit the bed, and you increase the potential of bending your rims should you hit a minor pothole in the road. Personally i would much rather lose the speedometer accuracy then lose the 1K$ later when i have to buy a new rim

[mxrz]

Anyone who cares about handling wouldn't raise the center of gravity... Over sized tires look retarded, you can have a slammed ride, and yet the car is high off the ground because your tires have a bigger diameter... Looks ghetto. If you're so concerned about potholes, run 18" wheels, problem solved.

[mr shickadance]

anyone who cares about handling would not put 20 inch wheels on thier car unless they needed it for brake clearance..... im pretty sure op is going for a look vs function


i'm not saying your wrong or incorrect, im just saying that you can go to a larger wheel if you really wanted to, you don't need to stick to stock wheel diameter. is it functional? yes, is it efficient? not really

oversized tires look retarded is a personal opinion, some wheels look better with meat on them, some wheels look better with a stretched tire on them. but to call a 295/35 an oversized tire is like calling sophia vergara fat


to me, i would rather have a little meat on the wheel and have the ride comfortable, then run a rubber band....op ask some people you know who are into wheels how pleasant their ride is when they run a 235/25 or something like that.

[mxrz]

anyone who cares about handling would not put 20 inch wheels on thier car unless they needed it for brake clearance

Not really. The B8 chassis for the coupe has been engineered to support 20" wheel sizes from the factory, that's why they're offered as an option from Audi, and proper forged 20" wheels can easily be lighter than stock wheels. 30 series tires still have over 3" of tire sidewall, calling that rubber band would be retarded. Going beyond what the chassis was engineered for would be bad for handling, like 20" wheels on a B6/B7, or cast wheels of pretty much any size over 18".

OP, forget about people arguing on the internet, go ask Audi and Tirerack what they think about oversized tires... You can still have the "looks" while not screwing with the handling dynamics. Put an oversized tire in that tire calculator and see the warning that pops up, it's not there for nothing, and it's not a matter of "opinion", it's just how things work.

[mr shickadance]

Not really. The B8 chassis for the coupe has been engineered to support 20" wheel sizes from the factory, that's why they're offered as an option from Audi, and proper forged 20" wheels can easily be lighter than stock wheels. 30 series tires still have over 3" of tire sidewall, calling that rubber band would be retarded. Going beyond what the chassis was engineered for would be bad for handling, like 20" wheels on a B6/B7, or cast wheels of pretty much any size over 18".

OP, forget about people arguing on the internet, go ask Audi and Tirerack what they think about oversized tires... You can still have the "looks" while not screwing with the handling dynamics. Put an oversized tire in that tire calculator and see the warning that pops up, it's not there for nothing, and it's not a matter of "opinion", it's just how things work.

tire rack and audi will tell you not to run it, the reason behind it is bc 1) tire rack has had way too many customers not knowing the proper way to run staggered and end up doing returns and what not, i know bc i order my tires from tire rack and literally have to beg for them to confirm my order bc they dont authorize any staggered set up of any kind when they know your car is 4wd 2) depends what audi dealer you go to, danbury audi has techs who love a nice staggered set up

if running an oversized tire was truly that unbearable, people with lifted jeeps/trucks running tires that are not just 8% larger, but immensely larger would be parked on the side of rod according to your logic, simply put, its fine... i really dont know where you learned that running above stock diameter is so much worse for your car but you need to let it go and stop misinforming members.

op, spend some time in the b7 chatterbox section, specifically the ftwltbdwictw thread (the main sticky, the one that has over 400+ pages) its a thread dedicated to wheels, those people, while i will give you a hefty warning, they can be rude sometimes, are incredibly knowledgable when it comes to wheels and what you can and cannot run. ask whatever wheel questions you have to them they will take care of you

[NYSpeedRacer]

Thanks for ALL your input and I definitely didn't want to start an argument. There were valid points all around.

I did check out those sites and they were definitely helpful. Additionally, I'll pop into the B7 chatterbox as well.

I did notice most wheel set that were for sale from other forums range from 19 (20) x 10 and 19 (20) x 11 wearing 255/30 (35) fronts and 295 (305)/ 30 (25) rears. I'm side it also has a lot to do with the offsets as well.

I'm mostly doing this for cosmetics to clear the BBK I want to get. In addition, my A5 was ordered with the 19" wheel option, which I hope will clear my BBK. I plan to use the stock 19s for a few track days.

[mr shickadance]

i think 19' will clear it no problem, stock 19's for track!?!?!

you should look into the enkei racing rpf-1's, they are a pretty cheap wheel, i think around 1200-1400 a set, but they are insanely light, really popular in the auto-cross/novice/beginner track folk bc they are such a cheap option to have as a go-to for a track day

[MonzaA5]

Aside from the obvious concerns for damaging the center differential if the rolling diameter is not closely matched, running a staggered setup on an AWD car increases understeer. This wouldn't be much of a problem on cars like Lambo and Porsche 911, where the engine is at the back, but on a front-engined Audi, it just doesn't make sense. Talk about form over function.

[mxrz]

if running an oversized tire was truly that unbearable, people with lifted jeeps/trucks running tires that are not just 8% larger, but immensely larger would be parked on the side of rod according to your logic, simply put, its fine.

Guess you know shit about jeeps. They have exactly the same problems, depending on the generation, people run older Jeeps with either custom setups without ABS/ESP, or simply disable the system. Newer Jeeps have special ABS systems that automatically adapt or kick into high off road mode. They also have additional problems like lift kits that move tie rod ends and change steering ratios, and ESP starts acting up during normal cornering. People either live with these issues or disable the electronic systems. So, simply put, it is not fine.

i really dont know where you learned that running above stock diameter is so much worse for your car but you need to let it go and stop misinforming members.

Or, you need to educate yourself and stop misinforming members.

Open your eyes, do a simple google search with these terms: "oversized tires abs" and learn something.

[mr shickadance]

Right I said that it would throw off your abs, I fully sdmit you are correct on that, but running a 20 inch wheel on something made to run 10s is really not the biggest deal in the world, it s fractions of a second that your abs is going to be off by.

Its not that your spewing incorrect info its that your doing it in a way that's going to scare away members from running a set up that's really not that bad to begin with

Sent from a galaxy far far away

[mxrz]

Right I said that it would throw off your abs, I fully sdmit you are correct on that, but running a 20 inch wheel on something made to run 10s is really not the biggest deal in the world, it s fractions of a second that your abs is going to be off by.

Its not that your spewing incorrect info its that your doing it in a way that's going to scare away members from running a set up that's really not that bad to begin with

Sent from a galaxy far far away

Yup, I am trying to scare them away from making a mediocre performing car out of their 5 by encouraging understeer and undermining the performance of ABS and ESP. We don't leave our house in the morning expecting to pull off emergency maneuvers to avoid collisions with other cars or people, but I prefer to know that if I have to, one day, my car can pull it off to the best of it's capabilities. Yours cant.

[mr shickadance]

your right....bc you know what wheels i currently have on my car....i forgot....you got me there

[mxrz]

your right....bc you know what wheels i currently have on my car....i forgot....you got me there

You said you run staggered...

[mr shickadance]

i do, 18x8.5, 18x9.5....same tire on all 4 wheels.....

[mxrz]

HEH, so it's do as I say not as I do kind of thing huh...

[mr shickadance]

its more of a i got a good deal on some winter tires that worked with the wheels i was going to use.....so its more of a i fell into a deal

please know your facts before you go making wild assumptions, bc people will start to view you as a fool

and for the record, you will never see my car on 20 inch wheels bc i think they don't fit our car, hell you won't even see me in aftermarket wheels (outside of my winter set up) bc i think the stock 19's look pretty killer to begin with. i am merely helping a member realize that he could very well run those tires just fine with little to no noticeable errors....if op wants to run 20's, fine by me, not my car, but i'll do everything i can to help a member out and answer their questions.

i really don't know why you continue to try and call me out, but keep going for it....it's really been working out well for you

[mxrz]

i really don't know why you continue to try and call me out

I would say it's the other way around actually... You also start a lot of your posts with "I really don't know"... How appropriate

[mr shickadance]

continuing to call me out.... yea when i don't know the 100% truth about something, i don;t go ahead claiming i do....i think thats a pretty damn respective thing to say as to help the op.


but again ....please keep calling me out bc you are making yourself look like the coolest guy i know

[mxrz]

continuing to call me out.... yea when i don't know the 100% truth about something, i don;t go ahead claiming i do....i think thats a pretty damn respective thing to say as to help the op.


but again ....please keep calling me out bc you are making yourself look like the coolest guy i know

I'm just replying to you as you are replying to me, this is how discussion forums work... You think staggering is cool, I think it's retarded, and presented arguments to support my opinion... Wouldn't this place suck if we all agreed on everything?

[mr shickadance]

i really dont know but i think then this site would be called vortex

[mxrz]

It'll never be THAT bad.

[mr shickadance]

i have heard sections of the b5 and b6 have gone to the likes of vortex, and like in the past 3 months the b7 community has seemed to almost double with scroobs....every other day it seems there is a thread about CAI's on turbo's and how much HP they can add.....makes me want to jump off a cliff


for a while on here the sprint power booster seemed like the mod to get too....