Curious as well, it will save a lot of HF to convert or lace in an 18' on the moderns.
I reckon IF they work unlike the speedway trainwrecks on short circuit i could move 10 sets.... but how is the compound compared to the x10 or the new dunlops ? and what sort of flex inthe knobs is there.
Are the tyre wall shorter than the 18" or are they a taller tyre when fitted. might be interesting on sprockets/ tracks