Does anyone actually run these? https://www.velocityap.com/product/aston-martin-racing-18-oz-racing-wheels-set-of-4/

I've kind of been obsessing over magnesium wheels lately having seen some OZ and Speedline sets for sale online at really low prices. I'm guessing the OZ wheels are cast instead of forged because it seems like forged Mg wheels are usually a lot more than 4k a set, and 20lbs is very heavy for magnesium.

Are those OZ wheels actually 10" in the rear too? I thought they were 11", which seems too wide. Would the tires be too stretched if I ran 255 in the front and something around the stock 275 in the rear? IIRC 255 on a 10" isn't good for bead seating.