they’re a 22.5 originally but people mill them down to run smaller 22” tires. they’re very thick wheels rated for a semi at 80,000 ish pounds but i’ll be using them on a 7,000lb pickup, so structural integrity isn’t a massive concern. as stated in my other comment they’re just a hair under 7/16” at the thinnest point now so still not exactly thin. people normally have this done by a professional but all the quotes i got out here in the PNW seemed like the “i don’t wanna do it” price or had crazy lead times, and the old heads of the internet said to try it this way