The wheels on my newly acquired LS400 have some chrome peeling, so I'd like to get a new set.

I know many people need to run spacers when installing new rims on an LS400 due to the big brakes up front (20-25mm on rims with a 40mm offset).

I'm wondering if 19x8.5 rims with a 58mm offset would fit (with or without spacers) on a 2000 LS400?

 

That is pretty sunken fitment at 58mm, not recommended. Slight chance it will rub the front inner suspension parts on a hard lock turn. You would want to be in the conservative 38-45mm range ball park. A flushed to aggressive fitment would be in the 25-35 mm range that will likely bring fender mods. Clearing the front calipers is dependent on the spoke design for big brakes or high to mid-disk type wheels.

 

see this thread where the OP attempted 19x8.5 +50 but it's unknown how the fronts fit. likely i was close and +58 will be even closer if not fitting at all. rears will likely fit for you.
https://www.clublexus.com/forums/ls-...-99-ucf20.html

also reiterate what mike said, clearance has more to do with spoke and disk design of the wheel and less to do with the offset.

 

I forgot about those, good memory Timmy!