Bought a is250 2012, looking to get better rims though....wanting 18" rims but don't know if they will fit

 

Yes they would 2007 is250 some come with 18' rims already.

 

Generally, 18s will fit pretty nicely, check out some of the builds here
https://www.clublexus.com/forums/is-...ls-on-2is.html

 

Check out our vendors as they have a HUGE Selection with knowledgeable associates that can help answer most questions.

I got both of my sets from FX Auto, Chris was very helpful in helping me get the setup that I wanted for my car.

https://www.clublexus.com/forums/clu...rketplace-118/

Browse around and see what interest you.