yes mate 255/40x18's as per IS250 Sport rims OE size, my suspension
is not lowered though.
The arch roller was broken (had been loaned out the day before) when I had mine done but I am sure it would be replaced by now.
Only needed a little roll, but it was bugging me like mad with a very minor scrape on one side every now and again so just had it done.
They removed the same amount off on both sides just in case of any future problems.
http://www.bmwmstyle.co.uk/ is the company.
They were very helpful to me when I was there, and they were very interested in the S/C IS200.
Took one of the guys for a spin when it was done