Let's put is this way, as an analogy you can treat your stroller as a car or as a bicycle. If you drive over a nail, you wouldn't contact your bicycle/car manufacturer in order to receive another tyre would you? Same goes here. Tyres and inner tubes are parts that wear down.
If you are worried about air tyres, no problem, X-lander also offers products with puncture free wheels!
You can of course buy those spare parts from us or from our local partners. Just contact us for more info.