[Biturbos4] rear suspension clearance

Rich Shiba rich at pdi.com
Mon Jul 12 18:24:57 EDT 2004

On Mon, 5 Jul 2004, Keman wrote:

> It happens at speed, Rich.
> When you get going, the tires flare out from centrepital force. Ever watch a
> dragster do a burnout? Suddenly that tiny few milimeters of clearance you
> have is gone and the tire is rubbing.

Hmm, that makes sense - I was cruising across the NV desert at speeds
higher than i generally do commuting  ;)   ..kinda begs the question tho,
at what speed does the problem begin...tough to find that out 'cept thru
a little trial and error testing it would seem...

> Don't pay attention to the stated size of the tire, go by the actual
> dimensions, specifically the section width. Some 225/45/17's will NOT fit on
> an S4. Every tire maker makes different sizes for that aspect ratio. It can
> vary by a half inch or more, and we don't have a half inch of clearance
> there. I've run 235/45/17 Bridgestone S03's with no problems, S02's the
> same. But Yokahoma AVSi's? 235/40 wouldn't even fit.
> Check out the exact specifications ... tirerack has them listed for a lot of
> tires. Possibly yours.

Yeah, my tires are listed there and they're actually smaller than the
SO3s you mentioned in 'section width' and the same in 'overall diameter'.
Unless my tires are more prone to flare out, it would seem like the SO3s
in the size you listed will be susceptible to the same problem...


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