Do you mean the correct speed rating based on the weight of your car? I ask this because the original speed rating, 'H', is scarce as hen's teeth now, but load ratings didn't even exist at the time of this car's manufacture. A load rating of above 100 is essential for these behemoths.rollmech said:Just a couple of points to remember this is relevent for UK cars, It is important that you use tyres of the correct speed rating as your insurance could be invalid if they aren't.
I certainly hope that this means the tire manufacturer's recommendation and not the automobile manufacturer. One of the world's best known tire manufacturers refused to supply OEM to Crewe because they thought the Crewe recommended inflation figures were so unsafe. Inflation of 24 PSI is just insanely low for a car of this weight, even if the tires are precisely as specified.According to the highway code tyres must be inflated to the the manufacturers recommendation.
Paul K said:The correct size tire WITH a white stripe and in the 235/70-15 size is available. They are an adequate 103 load rating and just one step below the correct 'H" speed rating at "T". They are offered by Introcar one of our R-R vendors in the UK so I assume they are fine to use. Below are links to the Hercules website and Introcar. Hercules tires are US made and been around for years. I am seriously considering putting my Kumhos on my '65 Lincoln and purchasing a set of the Hercules for my '78 T.