Hi All,
I'm almost pulling the trigger on a 2018 Supercharged. Stealer has 2 Contis crosscontact LX M&S on the front wheels and the spare, And 2 Pirelli Verde M&S on the rear. 275/45/R21.
I feel they should all be the same but he says it's no issue.
All have over 7mm tread.
Thanks for any guidance!
Will 2014 5.0 Supercharged Autobiography

I prefer all the same tyres all round, but it isn't an issue in reality to mix but best same on each axle.

Use it as a bargaining chip 👍

For the price that will be sold for, insist on four matching tyres, it might not matter technically but if you don't like it....  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

When I bought mine, I had the same issue, just waited until tyres were worn enough to justify spending on four new ones, Never had any trouble with road holding or mild off road use.
Use this as a bargaining chip as Dingg said. Hope all goes well.