Ok, I have a sadan but love the sport x and till thid day im kicking my self for not getting one. First off, I dont understand why wont you just put the bike inside. I know that puting a hitch on a lexus is a sin,
but i did just that and then bought a hitch rack system from 1upusa.com, its all aluminum. a bit on the $$$ but top notch.
this has been working great. putting a roof rack on the is300 is
a true sin. if you want pics just email me at