After hearing that the CR500 will be un available in the near future I have opted to get a set of the new ZZS.
They arrived this morning from Caterham & are now sitting in the garage waiting to be fitted a little later in the year once I've worn the last mil out of the CR500's
They have 5mm of tread. Think that is same as the CR500's.
Tread patten looks good & is similar the the CR500.
Looking forward to trying them out.