Is why I am sticking with 650/655mm diameter tyres. I can also do a 310/655R18 in Dunlop.
Whilst our local Pirelli Motorsport dealer lists the 305/640R18, he does not import them and requires a special order. Since they are then air-freighted, I get worried about chemical changes in the rubber given that aircraft holds are not heated and the rubber sees -50degC for 20-odd hours between Italy and Australia which cannot be good for it.
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