[Healeys] Tyres and Healey Tracking and Stability

[Joe and Lenore Armour]

James
You may already be aware that some tyres now have a 3 digit number on 
the sidewall beside the word WEAR FACTOR. This is apparently a rating 
indicating that under a controlled standard test it indicates relative 
wear. My opinion only, is that this indicates rubber softness to some 
extent which should also relate to grip and adhesion.
I have had good quality 17 inch, low profile  Michelens and Continentals 
with number 240. The lowest number on a 17 inch performance road tyre on 
a showroom new car was 140. High mileage tyres are often as high as 380
The Bridgestone Advan road legal track tyres I have on my racing Sprite 
are 80. Maybe this can help you with the relative performance of 
different tyres.
You obviously like to use your car some what differently to a lot of the 
listers who just tour from one location to another.

Joe