If you want to replace the tires, proceed as follows:
6.With one hand, press the locking tabs (one on each side) while holding the bottom housing with the other hand, pull the upper housing up and away from the rollers.
Locking tab
7.Remove one core assembly.
8.Replace each tire by sliding the tire off the core.
9.Install each new tire by gently pulling it over the core. The tires do not need to be installed in any specific orientation.
IMPORTANT:Do not overstretch the tire; it may tear.
10.Replace the core assembly in the lower feed module housing.
11.Repeat the replacement procedure outlined above for the other core assembly.