If after replacing a tyre or tube you experience an uneven balance on one of your wheels follow the steps below to fix it. This can give the impression of a wobble, bounce or bumpy ride.
First, deflate all the air from the wheel by depressing the inner pin on the valve of the inner tube, you'll hear the air rush out.
Reposition the tyre tread so that it is even all the way around the rim. There should be an even space between the outer rim of the wheel and the bead (hard ridge) of the tyre for the full circumference.
Reinflate the innertube (while holding the tyre tread) and it should allow the tread to stay in the correct location on the wheel, to allow the stroller to roll smoothly.
It may take a few tries, but this will likely fix the issue.