RV Spare Wheel Cover

This cover is made from a strong durable material and features an elastic band for superior fit.

Suitable for standard caravan tyres.
Keeps the spare wheel protected from the elements.
The 13" model suits tyres up to 24" / 60cm in diameter.

https://tiresize.com/tyre-size-calculator/

This will not suit caravans fitted with light truck tyres.