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quattrokhan5

20" wheels on the B8

Is anyone running 20" wheels with 255/30 tyres on their B8 S4?

Was wondering if going up to 20's will harm the handling of the car and the ride quality  

buzzard

Jayjemson is the only one I know running 20's
Not sure on size of tyre though


http://audisrs.com/ftopic55467-0-asc-165.php
quattrokhan5

buzzard wrote:
Jayjemson is the only one I know running 20's
Not sure on size of tyre though


http://audisrs.com/ftopic55467-0-asc-165.php


I know mate but I believe he is running 255/35 tyres with 20's which requires some arch work etc
jaygemson

Yes, I'm running 255/35.  Arch mods will only be required if you run an aggressive offset.  My current setup is 9x20" ET40, and yes some work was needed to prevent rubbing - front arch tab removal and minor surgery on the rear arch liners  The benefit of 255/35 is that you get a decent sidewall which provides rim protection and ride comfort.

Raywheel Design wheels are also 9x20" ET40 and they recommend 245/35 tyres.  I understand that no arch mods are required with that setup, but you get a much thinner sidewall.
quattrokhan5

jaygemson wrote:
Yes, I'm running 255/35.  Arch mods will only be required if you run an aggressive offset.  My current setup is 9x20" ET40, and yes some work was needed to prevent rubbing - front arch tab removal and minor surgery on the rear arch liners  The benefit of 255/35 is that you get a decent sidewall which provides rim protection and ride comfort.

Raywheel Design wheels are also 9x20" ET40 and they recommend 245/35 tyres.  I understand that no arch mods are required with that setup, but you get a much thinner sidewall.


Jay, I know what you are running as we have exchanged PM's in the past but was just wondering if anyone has experience with 255/30 tyres as I would like to keep the rolling radius the same as I have now
jaygemson

Of course, sorry!

Some useful conversation about 255/30 here: http://www.audizine.com/forum/sho...hp/517223-Running-255-35-20-tires

There's an important note in there which influenced my decision too - 255/30 series tyres do not come with an OEM-equivalent load rating.  255/35 on the other hand do, peace of mind.
quattrokhan5

jaygemson wrote:
Of course, sorry bud!


No probs mate

Just fancy a change of wheel and would really like 20's but at the moment it sounds like I will be sticking with my 19's as they feel perfect, but you know how it is - just fancy a new look  
Adrian E

We're on factory 20s on our S5 which are 265/30 and give an acceptable rolling radius.

The speedo is bang on accurate with the 20s and over-reads by 2-3mph on the factory spec 18" winter tyres which are 245/40
quattrokhan5

Adrian E wrote:
We're on factory 20s on our S5 which are 265/30 and give an acceptable rolling radius.

The speedo is bang on accurate with the 20s and over-reads by 2-3mph on the factory spec 18" winter tyres which are 245/40


Is there a considerable difference in how the car feels when you jump onto the 20's from your 18's?
Adrian E

It doesn't feel unduly crashy on the 20s - you can tell there's more sidewall with the 18s but I've never found myself wishing the 18s were fitted just because of the ride quality

Most of the difference I find is down to winter vs summer tyres in my case. I don't find there's any massive negatives of running the 20s, although they've never been on during the winter while we've owned the car (2years now)
quattrokhan5

Thanks for all your info guys
Noggymike

I run 20's and really don't feel a problem with ride quality etc, it's just you need to be eagle eyed for potholes with running such low sidewalls
Technick

quattrokhan5 wrote:
buzzard wrote:
Jayjemson is the only one I know running 20's
Not sure on size of tyre though


http://audisrs.com/ftopic55467-0-asc-165.php


I know mate but I believe he is running 255/35 tyres with 20's which requires some arch work etc


I'm running 265/30 tyres with 20's and may well move to 255/30 on the next set... but mine did require some arch work also  

Was noticeably firmer than the 255/35 on 19's that they replaced (and a fair comparison as both before and after were PZeros), but I actually found the handling better on the 20's with my setup.

Have heard a few horror stories with aftermarket 20's, so glad I stuck with OEM, and would recommend the same to anyone else considering it.
quattrokhan5

Technick wrote:
quattrokhan5 wrote:
buzzard wrote:
Jayjemson is the only one I know running 20's
Not sure on size of tyre though


http://audisrs.com/ftopic55467-0-asc-165.php


I know mate but I believe he is running 255/35 tyres with 20's which requires some arch work etc


I'm running 265/30 tyres with 20's and may well move to 255/30 on the next set... but mine did require some arch work also  

Was noticeably firmer than the 255/35 on 19's that they replaced (and a fair comparison as both before and after were PZeros), but I actually found the handling better on the 20's with my setup.

Have heard a few horror stories with aftermarket 20's, so glad I stuck with OEM, and would recommend the same to anyone else considering it.


Did you require arch work due to running 265/30 tyres?  I heard no arch work is required when running 255/30 tyres on 20's hence why I am interested in buying some 20's.  

I agree to a certain extent that OEM is the way to go but there are some very good aftermarket wheels out there as well
quattrokhan5

Noggymike wrote:
I run 20's and really don't feel a problem with ride quality etc, it's just you need to be eagle eyed for potholes with running such low sidewalls


Tell me about it    we get a lot of those on our roads, I may end up just sticking with 19's but just buy a different design
Dane

I ran 265 30 19 on OEM B7 Wheels on my b5 RS and cracked a wheel twice.

Went to 255 35 19, never had a cracking problem again and the ride was noticeably better, I tend to not notice subtle changes in such things.
Technick

quattrokhan5 wrote:

Did you require arch work due to running 265/30 tyres?  I heard no arch work is required when running 255/30 tyres on 20's hence why I am interested in buying some 20's.  

I agree to a certain extent that OEM is the way to go but there are some very good aftermarket wheels out there as well


To be fair, the "arch work" came before the wheels/tyres, and is slightly unusual (some pics embedded within this thread).

I've heard the same about 255/30/20's, but I would imagine the tyre choice could tip the balance either way, along with the actual width/offset of the wheels themselves (e.g. 9J or above may be an issue).
quattrokhan5

Does anyone know if running a 9j/19" Et33 wheel will cause any issues on the B8 with 255/35 tyres?  The wheels are off an A5 and are OEM
Technick

quattrokhan5 wrote:
Does anyone know if running a 9j/19" Et33 wheel will cause any issues on the B8 with 255/35 tyres?  The wheels are off an A5 and are OEM

I'm no expert, but I think they'd foul on the arches.

My reasoning for this:
My 'baseline' S4 wheels are 8.5J 19 ET43 with 255/35 tyres
With 9J 19 ET33 and 255/35 tyres, I calculate that you'd have around 16.4mm more poke than that 'baseline', and I don't think there's enough space in the arches to accommodate that (10mm perhaps, but I think 16.4mm would be too much).
As I say, though, I'm no expert and my arches are each around 40mm wider than standard, so I don't have a huge amount of personal experience with this dilemma!
jaygemson

19x9J ET33 is the S5 setup, right?

These do fit the S4 but again its quite an aggressive fitment so you will to run slightly stretched tyres to avoid rubbing.  More info and pics here: http://www.audizine.com/forum/sho...quot-S5-wheels-fit-on-our-B8-S4-s
quattrokhan5

jaygemson wrote:
19x9J ET33 is the S5 setup, right?

These do fit the S4 but again its quite an aggressive fitment so you will to run slightly stretched tyres to avoid rubbing.  More info and pics here: http://www.audizine.com/forum/sho...quot-S5-wheels-fit-on-our-B8-S4-s


Yes, wheels are from an A5/S5

Good info on Audizine
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