Yes 17", the XI stock rims are 17" so easy fit, wanted 18's but oh well. The rears are et20 and the fronts are et47. I got both rears brand new with brand new tires on them from ECS for $150 a piece! The had two left and had used them as demo's for a photoshoot. The tires alone are close to $150, so the rims are free...super win there. Then TMS had one et47 brand new rim for sale and I was able to haggle with the sales guy to part with it for under $400, then I had to buy one brand new one from Bavarian for full price then buy two front tires full price also. So all in all I think I got a pretty good deal.. Wasn't sure if I would like the split offsets front and back but I actually do.