"Ron" <ron@ron114.com> wrote in message
news:dY5Db.5672$q77.58354782@news-text.cableinet.net...
>
> "Stuart" <greenbanshee66@yahoo.com> wrote in message
> news:%y2Db.58060$kh4.40604@news-binary.blueyonder.co.uk...
> >
> > "Doug Ramage" <xxdoug-ramage@taxman.uk.com> wrote in message
> > news:bri98s$3lr67$1@ID-34015.news.uni-berlin.de...
> > >
> > > "Ron" <ron@ron114.com> wrote in message
> > > news:2s0Db.5301$W14.54746282@news-text.cableinet.net...
> > > >
> > > > "Clanger" <D231@sidfseltd.freeserve.co.uk> wrote in message
> > > > news:brh62p$irv$1@newsg4.svr.pol.co.uk...
> > > > >
> > > > > >
> > > > >
> > > > > and I thought the speed of a car was taken from a drive shaft
within
> > the
> > > > > gear box.........by an electronic sensor. This way tyre size does
> not
> > > come
> > > > > into the equation......or does it.
> > > > >
> > > > >
> > > >
> > > > Bigger wheels with bigger tyres will always cause speedo problems
with
> > > > current technology, the speed is determined by revoloutions of the
> > wheel,
> > > be
> > > > it via the drive shaft or whatever, bigger wheels and incorrect tyre
> > > choice
> > > > will always effect the amount of revolutions the wheel does, and
cause
> > the
> > > > speedo to show a slower speed.
> > > >
> > > > Unless you have a GPS speedo.
> > > >
> > > > What pete said is spot on, you have to lower the sidewall to
> compansate
> > > for
> > > > the larger diameter wheel, right down the 35 profile tires for 19",
> the
> > > only
> > > > limiting factor on choosing rims is the "J", this is the diameter
> width
> > > > wise, 8J should go on with no problems.
> > > >
> > > > Ron
> > > >
> > > >
> > >
> > > You will probably need to advise your insurance company, if this is
not
> an
> > > Audi spec option - or risk voiding your policy.
> > >
> > > A company refused to insure me for not standard alloy wheels (even of
> the
> > > same Audi spec, and supplied by an Audi dealer). Note "refused" - not
> > giving
> > > me the option to pay a higher premium.
> > > --
> > > Doug Ramage
> > >
> > >
> > Thanks for all the valuable information.
> > I will ask the insurance before doing anything.
> > Stuart
> >
> >
>
> BTW Stuart, 17's are a bit small, 18" will look much nicer, a nice set of
> 18" RS4 replicas look very nice on A6's
>
> Tyres are a little more, around 100 quid each for cheap ones, 17" tyres
are
> abit cheaper, if its a quattro you should see 30k miles from a set of
tyres,
> if you dont drive like a nutter
>
> Ron
>
>

30k on a set of (performance) tyres?! My best would be about 20k on Toyo
Proxes for my S3. The worst was 6k for a set of front tyres for my Lancia
4x4 (uprated to 250 bhp).
--
Doug Ramage

 

"Doug Ramage" <xxdoug-ramage@taxman.uk.com> wrote in message
news:brirf8$3nsdb$1@ID-34015.news.uni-berlin.de...
>
> "Ron" <ron@ron114.com> wrote in message
> news:dY5Db.5672$q77.58354782@news-text.cableinet.net...
> >
> > "Stuart" <greenbanshee66@yahoo.com> wrote in message
> > news:%y2Db.58060$kh4.40604@news-binary.blueyonder.co.uk...
> > >
> > > "Doug Ramage" <xxdoug-ramage@taxman.uk.com> wrote in message
> > > news:bri98s$3lr67$1@ID-34015.news.uni-berlin.de...
> > > >
> > > > "Ron" <ron@ron114.com> wrote in message
> > > > news:2s0Db.5301$W14.54746282@news-text.cableinet.net...
> > > > >
> > > > > "Clanger" <D231@sidfseltd.freeserve.co.uk> wrote in message
> > > > > news:brh62p$irv$1@newsg4.svr.pol.co.uk...
> > > > > >
> > > > > > >
> > > > > >
> > > > > > and I thought the speed of a car was taken from a drive shaft
> within
> > > the
> > > > > > gear box.........by an electronic sensor. This way tyre size
does
> > not
> > > > come
> > > > > > into the equation......or does it.
> > > > > >
> > > > > >
> > > > >
> > > > > Bigger wheels with bigger tyres will always cause speedo problems
> with
> > > > > current technology, the speed is determined by revoloutions of the
> > > wheel,
> > > > be
> > > > > it via the drive shaft or whatever, bigger wheels and incorrect
tyre
> > > > choice
> > > > > will always effect the amount of revolutions the wheel does, and
> cause
> > > the
> > > > > speedo to show a slower speed.
> > > > >
> > > > > Unless you have a GPS speedo.
> > > > >
> > > > > What pete said is spot on, you have to lower the sidewall to
> > compansate
> > > > for
> > > > > the larger diameter wheel, right down the 35 profile tires for
19",
> > the
> > > > only
> > > > > limiting factor on choosing rims is the "J", this is the diameter
> > width
> > > > > wise, 8J should go on with no problems.
> > > > >
> > > > > Ron
> > > > >
> > > > >
> > > >
> > > > You will probably need to advise your insurance company, if this is
> not
> > an
> > > > Audi spec option - or risk voiding your policy.
> > > >
> > > > A company refused to insure me for not standard alloy wheels (even
of
> > the
> > > > same Audi spec, and supplied by an Audi dealer). Note "refused" -
not
> > > giving
> > > > me the option to pay a higher premium.
> > > > --
> > > > Doug Ramage
> > > >
> > > >
> > > Thanks for all the valuable information.
> > > I will ask the insurance before doing anything.
> > > Stuart
> > >
> > >
> >
> > BTW Stuart, 17's are a bit small, 18" will look much nicer, a nice set
of
> > 18" RS4 replicas look very nice on A6's
> >
> > Tyres are a little more, around 100 quid each for cheap ones, 17" tyres
> are
> > abit cheaper, if its a quattro you should see 30k miles from a set of
> tyres,
> > if you dont drive like a nutter
> >
> > Ron
> >
> >
>
> 30k on a set of (performance) tyres?! My best would be about 20k on Toyo
> Proxes for my S3. The worst was 6k for a set of front tyres for my Lancia
> 4x4 (uprated to 250 bhp).
> --
> Doug Ramage
>
>

I mean budget tyres, and an s3 would be too quick to be driven slow I
would prob see 10k on a set lol

 

> Bigger wheels with bigger tyres will always cause speedo problems with
> current technology, the speed is determined by revoloutions of the wheel,
be
> it via the drive shaft or whatever, bigger wheels and incorrect tyre
choice
> will always effect the amount of revolutions the wheel does, and cause the
> speedo to show a slower speed.
>
> Unless you have a GPS speedo.
>
> What pete said is spot on, you have to lower the sidewall to compansate
for
> the larger diameter wheel, right down the 35 profile tires for 19", the
only
> limiting factor on choosing rims is the "J", this is the diameter width
> wise, 8J should go on with no problems.
>
> Ron
>
>
most high end car manuf. compensate for this and the speedo is a little
underrated or slow for bigger tires