18x8.5" ET35 would work great on your car as a square set up with 235/40/18 tires. Please note that a square configuration is not necessary on AWD BMW's and we could also set you up with a staggered fitment. The square fitment will provide a nice visual improvement over your stock 18's but a 12mm spacer or possibly more could still be used on the rear with the square set up. A small spacer could possibly be used in the front but you do risk rubbing unless you have camber plates.
Originally Posted by ralfonso
What sizes would you recommend for a squared setup on a 2010 335xi? Would I still need spacers to improve the look over my stock 18s?