Want this question answered?
yes
Can a 225/60R 16 tire replace a 235/70R 16 tire.
Yes, you can.
yes, its just a touch slimmer from sidewall to sidewall. its ok.
yes yes
No, how would they fit the rim.
no you cannot
no you cannot
Yes
Probably not because of the rim width. The 255 is a wider tire.
Yes, that's a reasonable change, not too different. But make SURE there is enough clearance for steering lock.
yes u can its still a 18 inch tyre it will be slightly narrower the correct size would be 235/55R18 but it would still fit.