Quote:
Originally Posted by bjohnsonsmith
"I wonder why Michelin refused to tender for F1 and demanded 18" for F1 then!?"
It will be down to cost. Why spend money on developing a 15" tyre, when they have an 18" tyre that works perfectly well.
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I'm all for 18" -- the problem is 18" LMP tyres have a larger overall diameter than Formula car tyres.
F1 and Indycar tyres only have an approximately 660mm overall diameter, quite a bit smaller than what LMP1 and GT racing use. The change to 18" will be a break from tradition and will increase the overall diameter of the tyres slightly.