Maximum Wheel size for CL9 Euro?

[x10Hz]

Hey guys

I've got a CL9 Euro and I'm looking to get some 18 inch rims. The guy at the shop told me that the widest I can go is 18x8, but I'm sure I've see ppl have 18x9 before. My question is, what is the maximum size width? Did the guy have to modify his guards to fit 18x9? would 18x8.5 also fit? What's involved it widening the guards?

Sorry for all the noob questions...

you can fit almost anything dude.. just depends on how much money you got.. i spend $2700 (wheels + tyres + rays lugs + fender work) to get 18x9.5 +25 all round to fit. Dont listen to the tyre shops. they know jack shit.