[s-cars] what is the optimum tire size for 17x8 wheel

[Theodore Chen]

don't sweat the rim width issue.  some cars, like the mustang cobra, came
from the factory with 255/40/17 on 17x8 rims.

fender clearance is another issue that you'll have to figure out separately.


--- Dave Ellis <UrS4 at sympatico.ca> wrote:
> 
> Hmmm... I too am trying to decide between 245/40-17 and 255/40-17 tires. 
> 
> I was leaning towards a 255 tire until I checked the data sheets and 
> found that both of the tires I'm considering (Dunlop SP8000 or Toyo 
> T1-R) both list 8.5" as the minimum mounting width for their 255/40-17 
> tires.  
> 
> Also, in a recent thread on Audiworld discussing tire widths a couple of 
> posters described light rubbing with the car loaded down or when 
> reversing when using a 255 tire (I'm guessing wheel offset will play a 
> large roll here).
> 
> For the roads I have to drive on I have decided to go no larger than a 
> 17" wheel, but finding a 17x8.5 wheel is next to impossible unless you 
> have deep pockets for something _nice_ like BBS or such.  So it looks 
> like for now I'll have to settle for a 17x8 wheel.
> 
> While I would prefer to have a 255 tire, I don't want _any_ rubbing 
> issues or to have to roll the fender lip or such.  I also don't want to 
> risk compromising the mounting of the tire or the sidewall integrity by 
> mounting a tire on a narrower wheel than is required.
> 
> What experiences have fellow S-car listers had with 
>    -a 255 width tires on an 8" wide wheel?  
>    -rubbing or contact issues with a 255 tire?
>    -if you do/don't have rubbing with a 255 tire, what
>     is the offset of your wheels?
> 
> I'm running Eibach Pro springs with Boge TurboGas dampers if that's any 
> help.
> 
> By the way, the best tire calculator and offset calculation web pages 
> I've found to date are as follows:
> 
>   http://gs.tolan-hoechst.com/tirecalc.htm
>   http://www.miata.net/garage/tirecalc.html
>   http://toy4two.home.mindspring.com/offset.html
> 
> -Dave
> Ottawa, Canada
> '93 S4
> '99.5 A4 1.8t
> 
> 
> 
> On April 12, 2005 13:54, CaptMagu at aol.com wrote:
> > s-heads
> >
> > Actually, 255/40-17, is the closest to the diameter of the stock
> > 225/50-16. This size is also the stock size with the C5 A6 when you
> > order 17x8 wheels and tires from the factory. I used to run
> > 245/40-17s on 17x8 rims for summer but have recently switched to
> > 18x8.5s. I still run 255/40-17 Victoracers for the track with SSR
> > Comp 17x8.5s. As another data point, the actual width of 245, 255 or
> > whatever size tire varies greatly from one manufacturer to another.
> > Several years ago I mounted a set of Yokohama ES100s in 255/40-17 on
> > my wife's A6 4.2. They were 30mm wider than my 245/40-17 Toyo T1Ss.
> > HTH
> >
> > Hap, wit dakine tire info from Evahboost, Maguire
> 
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