Alright mate.
He tells me that the harder compound is an endurance compound that is used in the far east for 24 hour races.
Would have to spend more time warming them up than say others.
The medium which is the one I have is the race compound so wear faster Basiclly he said if you do long section on a track day, that the hard will last longer and be the one to go for
If you defo want a set they are going to double check but 480 delivery for four is the price.
Pm me if your intrested.
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