what's the car tyre size for a peugeot 306? (1997)?

Answer 1

It will say it on the side of your tyre. Something like 185/65R14 but it will all depend on the wheel your model has fitted.

For example you may have 16" alloys on the sporty model whereas a base model had 14" steel wheels.

Answer 2

there is a sticker with the correct tire size on the inside edge of the driver door or post, some car manufacturer will put two sizes. either will work.

also any place that sells tire will have a book to look up the correct size. They will gladly help you.