[Healeys] Tyre Pressures

Len and/or Marge Hartnett thehartnetts at earthlink.net
Sat Aug 6 16:02:50 MDT 2011


Tim:  What is your goal?  Ride?  Performance?  Longevity?

My main goal has always been performance and longevity.  To attain these, my 
logic (?) has said that you want maximum rubber to the road.  That means 
full contact and even wear across the tread.  Richard Hockert strives for 
that by using a temperature gun (no prices given).  If you don't need to 
adjust your pressures immediately, you can do the same thing with a tread 
depth gauge (O/Reiley/Kragen, less than $5.00).  Measure your tread depth 
inner, middle, and outer.  Check again in six months.  Inner and outer 
wearing more than middle means low pressure.  Middle wearing faster than 
inner and outer means pressure too high.   Adjust to have wear rate even 
across the tread.  Of course, if the inner and outer are wearing at 
different rates, there are other problems such as mis-alignment, bad shocks, 
etc.

I purchased new 185-70-15 Vredesteins May last year.  Tread depth was 10/32 
inch across all treads.  June this year, at 5,444 miles, tread wear was 9/32 
across all treads with the exception of the left rear tire that shows 9/32 
inner, 8 1/2 /32 middle and outer (?).  Tire pressure is 28 psi.

For gymkhana/autocross/hill climb, I increase pressure to about 35 psi.

(The Other) Len
Vacaville, CA, USA
1967 AH 3000 MkIII, HBJ8L39031


----- Original Message ----- 
From: "Tim Ward" <timwarduk at aol.com>
To: <healeys at autox.team.net>
Sent: Saturday, August 06, 2011 4:59 AM
Subject: [Healeys] Tyre Pressures


> Hi List
>
>
>
> Please give me the benefit of your collectives wisdom again.
>
>
>
> On my BJ8 I have Fulda Y2000 Tyres. They are 185/70R15 89V.
>
>
>
> Any views as to the idea pressure to set these tyres for speeds up to 
> 80mph.
> Currently they are 22 psi at the front and 20.5 psi at the back.
>
>
>
> Your views will be gratefully received.
>
>
>
> Thanks
>
>
>
> Tim
>
>
>
>
>
> Tim Ward
>
> Warwick House
>
> 12 Mill Road
>
> Kislingbury
>
> NN7 4BB
>
> Tel: 07855 388 751
>
>
>
> www.sixsigmaworks.co.uk
>
> www.Shuttermagic.co.uk
>
> www.kislingburyonline.co.uk
>
> [demime 1.01d removed an attachment of type image/jpeg which had a name of 
> image001.jpg]
> _______________________________________________


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