I have the 2023 Is 350 F sport awd with the staggered wheels. I decided to switch to a square wheel set up for winter tires. I put on 19X8 Sparco DRS rims with a 245/35R19 93W winter tire. The whole car has a vibration now. The tires are balanced and the alignment is not off. How do I fix this?

Try a different shop for balancing. I’ve been very happy with a local Discount Tire shop that does Road Force balancing. They showed me that a tire was actually ‘out of round’, clearly visible with the wheel&tire spinning on the machine.

+1. Sometimes road-force balancing makes the difference. Had a friend who had a similar issue on his car with new tires - turns out the mobile tire installer didn't have the capability to do a road-force balance, so he needed to take it into a shop. After that, the problem was solved.

Are the wheels you put on hub centric? If so, are they the correct size to fit the Lexus hub? If not, you probably need centering rings to make sure the wheels are centered.

This was my initial thought too.

I will say, I have had to have wheels rebalanced a few times. I would have them checked. Another echo for road force balancing.

This. Lexus bore size is usually 60.1 and I believe DRS is 73.1.

If it isn’t the wheel ring adapters I’d look maybe at the rotors or if the lugs are overtorqued

Make sure you have hub centric rings and road force balance