re earlier post about the toyo tyres found this info which might be of interest from a site called toyo pitlane.....

Proxes R888: All Proxes R888 tyres held in stock are "GG" tread compound. The "GG" is a versatile tread compound, suitable for a wide range of applications.

The Proxes R888 is available with the "GGG" tread compound in a small range of sizes from Toyo motor sport dealers by indent order only. No "GGG" tyres are kept in stock due to a short shelf life of this tread compound. The "GGG" tread compound is suitable for a narrow range of applications only, and has a much faster wear rate compared to the "GG" compound.

The tread compound of each Toyo Proxes R888 tyre is marked on the sidewall.

not sure what impact this might have if you store the car over winter with the GGG type fitted????

Cheers

Two G's here! Good to know they wont rip themselves to pieces on the 1st outing!

Would the storage of GGG not be better if they were kept covered/cold/in the dark? ie in a gargae!?

You simply loose grip.

You won't need GGGs for normal use, i.e. road and track days. They're only any good for sprints!