Are the tyres inflated with air?
Yes, when your Croozer leaves the factory, air is added to the tyres. If the tyres are soft, you may need to add air to the pressure indicated on the tyre. Do not over inflate. To add air, use a bicycle pump and not a gas station pump. Note: A soft tyre does not indicate a problem. This is normal for all tyres, as air slowly escapes through the rubber and the tyre valve. See the section on tyres below.