The rules for the upcoming Slot.it series will allow NSR Supergrip and Ultragrip tires in widths no wider than 10mm. This is done due to the shortage of F30 tires from Slot.it.
I don’t see a reason to use NSR as a substitute for Thunderslot tires as they work great and are readily available.
Marty my reference to Thunderslots is — in the case when and if they are somehow Not readily available. My point is to consider that alternative now, in advance, and be ready when and if that situation ever occurs.
Regarding the size, certainly that was the intent to stick to the Supergrips that when mounted are 10mm wide (as with SIPT28/F30s).