You're right Sandeep, I looked again closely and since the 10" have more off-set, there is probably enough room towards my spring-plates, but not towards the fender lip. I have the wider (+74mm per side) alu arms as well.
I still think that 18" will look out of proportion on my car, but 5 years ago, I thought that of 17" as apposed to 16" so who knows
Thefact that the 18" were also almost double the price of the 17" doesn't help either...
Greetings,
Walter