Thanks, McRat - when I called 1010 they were concerned because so far they don't think a wider tire will fit on this rim.
If they do fit, any thoughts on the added rolling resistance of a wider tire? I mean, the stock tire is already 10" wide ha.
<- Guy on internet who has done a lot of different hobby racing, and has 5 sets of different tires for a Corvette, and has had custom one-off wheels built.
The tires are 10" wide at the carcass, not the contact patch (8.9")
Ideally, you should have 1/2" wider rim for 265's which are on paper 0.394" wider (about width of you pinky finger nail). The tire is about 1% larger in circumference and sticks out less than a 1/4" per side. It actually will resist curbing the wheels some. I often do this to my wife's car, run 10-20mm wider for some curb protection.
They said the same "too wide" thing about the Volt which comes with 215's and I ran 235's Pirelli CINTURATO P7 WITH SEAL INSIDE - SIZE: 235/45R17. They worked fine, but since they were performance self-sealing tires, I don't expect them to make it to 40,000 miles. Zero effect on range for my application. Better track performance. I have a 'metered' loop I drive, that I've done 100's of times over the years, not a noticeable difference once the tires have 2000 miles of wear on them. Tires will improve their performance when they get some wearing in. Racers shave 1/2 the tread depth off their tires before using them, Tirerack does it for about $15 a wheel.
Cliff Notes: If it were my car, I'd run them. But to play it safe, you need a wider or smaller dia rim to have tire choices. The most winter worthy 255/40-22 I can find is https://www.tirerack.com/tires/tires...e&autoModClar=
Which should have significantly better grip on ice than the Pirelli.