285/30/20 = 11.22" Wide x 26.73" Diameter
225/60/16 = 8.86" Wide x 26.62" Diameter
The diameter should be no issue but depending upon the wheel offset, there could be issues with the width. However I think 275s have been used with no issue. Someone with more wheel experience may chime in.
i own a 03 Ls, and i happen have 225-30-20 on my car and i love them, yes make sure you have the correct size bolt pattern, prehaps maybe going to your local tire shop and get a quote from them may help.. also i do believe that 285 -30-20 is to wide for a Ls.. good luck ~
I just found this out myself the other day,on a 2000 Ls 5x108,offset-60mm,
Rim width 7.5'',Wheel nut threads 12mmx1.5 if that helps in anyway.Let me know how that works out because im lookin to put 20''or 22'' rims on my 00' LS
yea i brought them to a local wheel shop and they said that the back tires might rub with 285/30 on them. Whats the worst that can happen with a little bit of rub?