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MidwayJ
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Yes, RTR Tech 7 and Tech 5s are popular choices. I would go with 275/40. The 275/35s are smaller diameter than stock and will look small and increase wheel gap.
MidwayJ
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I don't own an S650 but my understanding is wheels that fit on the S550 also fit fine on the S650.
You could go to the mustang7g.com site and ask there for confirmation.
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Stangalang
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Yes. I had 19s on my Ecoboost Mustang (S550) and it worked on my GT S550. AFAIK the S650 is identical for wheel fitment.
TonyT930
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I went 285/35r19 Conti dws06 and it's perfect for the rear
TRDFurgesson
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My recommendation would be a square setup from Apex, Apex spacer and ARP front studs. Forged 19x11’s are 20.4lbs. That 18x11 on the left is 20.0lbs. Their website will has a great link for fitment.
