Wife's Ed35 has 225/35x19 on her factory fitted 19s. My R has 235/35x19 on my factory fitted 19s . It all depends on the width of the wheel, R wheels are wider. I personally would have 235s on 19" CKs because of the extra rim protection of the wider tyre, but either would be okay. IMHO CKs will be okay without spacers as they are ET44, I believe.