At Tyres.co.uk for the Peugeot 308 CC, you can choose Goodyear EfficientGrip Performance 2 (94W XL) and Michelin Primacy 4 (94Y XL) in 225/45 R17 for the model 2012 2.0 HDi 163 with factory 17-inch wheels. Please check your registration and door sticker as other 308 CC variants had different wheel fitments.
Information on the Peugeot 308 CC tyre size can be found on the tyre/paint label on the driver's side door. Open the driver's door and look on the door frame for a sticker that lists the cold tyre inflation pressures, the approved wheel and tyre sizes, recommended tyre brands and the spare wheel pressure.
The Peugeot 308 CC does not need all four tyres to be swapped out since all versions are front wheel drive and there is no all wheel drive matching tyre requirement. Tyres can be replaced in pairs by axle when possible, and each axle should be kept matched in size, construction, and specifications. According to UK safety guidelines, when two new tyres are fitted, they should be fitted on the rear axle.