The rear wheels were originally 18x9.5 and were widened an extra 2" by Tim Williams @ wheel works in Burlington NJ. Tim has been in business for over 20 years and is the best at what he does. he has widened wheels for tons of supras, Ferrari's, and drag cars. when the wheels/tires were mounted and balanced they balanced PERFECTLY. the guy at the tire shop was very impressed.
build link:
Custom Flares/Paint Project-335's in the rear?!*UPDATED 9/21*Photoshoot on pg 21 & 22 - my.IS - Lexus IS Forum