Taking that picture in the rain definitely gets you an upvote. Dedication!

About 7" in the the middle between the doors and closer to 6" towards the ends. Pic: https://imgur.com/a/8qR1r6g

22' crewmax

https://pressroom.toyota.com/toyota-brings-lifted-accessorized-all-new-2022-tundra-to-sema/ click related images. Doesn’t look like they tell you but at least 5” might be 6”.

Hoping someone here can help me out that has the TRD Cast Aluminum running boards on their 22 Tundra. I am trying to figure out what the width of the step is.

My googling hasn't turned up anything and the dealer wasn't much help either when I gave them a ring.

Thanks!

2022 TRD Running Board Dimensions