Yup, strange question, I know. But I just thought of it.
What do you think would happen if you used SG on the tires after cleaning them? Any good? Harmful? (...) (Probably not good, I know, but an interesting discussion nevertheless.)
Besides, the last time I read my bottles of Klasse (or on the web) I think it basically lists a large number of non-porus surfaces you can use it on, but no porus stuff like vinyl or rubber....
