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More on rim/tyre specs

To: british-cars@autox.team.net, blackthorn@cix.compulink.co.uk
Subject: More on rim/tyre specs
From: blackthorn@cix.compulink.co.uk (Steve Goodall)
Date: Sun, 18 Sep 94 13:02 BST-1
British cars of the ages that you drive often have a coding for their 
tyre spec - this table was quoted by the AA in 1976:

        Rim     Size mark       Speed Mark
        Dia     only            S               H               V
        --------------------------------------------------------------
        10"     Up to           Up to           Up to           
                75 mph          95 mph          110 mph 
                120 km/h        150 km/h        175 km/h
        --------------------------------------------------------------
                12"     Up to           Up to           Up to
                85 mph          100 mph         115 mph
                135 km/h        160 km/h        185 km/h
        --------------------------------------------------------------
        13"     Up to           Up to           Up to           Over
        and     95 mph          110 mph         125 mph         125 
mph     over    150 km/h        175 km/h        200 km/h        200 
km              
Thus a tyre spec of 175HR14 was 175 width, 14" rim, radial, stressed 
to 125 mph.

Bye from Steve!



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