Would tyre brand and model play a part in whether the tyres rub here?
The reason I ask this is sometimes different tyres have a different sidewall shape, despite being the same profile (ie: some have more round shoulders while others have square shoulders). I've noticed on C4's with 11" wide rears tyre brand and model plays as much of a role as profile when it comes to how they fit under the rear guards.
Is there anything to this theory on C3's?
(sorry Cosmic, I hope this doesn't put things off track)