I'm running 285s/32s, and used a cheap off the shelf spacer. Since it's just for the spare and not actual axle use, cheap is good 'nuf.
A two-pack of a 2" spacer was $50, but that particular one is NLA. I've only got one spare tire, so the second is still sitting on the shelf.
Amazon product ASIN B08T7T4CZH
A two-pack of a 2" spacer was $50, but that particular one is NLA. I've only got one spare tire, so the second is still sitting on the shelf.
Amazon product ASIN B08T7T4CZH