Preowned Tundra suspension setup?

Hello, I picked up my tundra locally last year from a dealer so I don’t have any info as to what the previous owner did to the truck. I’m due for some new tires and I’m trying to figure out what suspension setup I have to help figure out sizing. It’s got bilstein 5100s all the way around, but I’m not sure what height setting they’re set at. Also is there a spacer under the leaf pack, or is that normal for the stock setup? Also is the silver piece in the front shock a spacer or part of the standard setup?2020 sr5 4x4 for reference.

 

To me, they look maxed out on the 5100s...also, looking at CV angles, it's lifted over 2"! The rear looks to have a 1 - 1-1/2" block under the leaf pack...nothing particularly wrong with it as it looks...

 

Thanks for the info Hulk!