The Difference Between Foam Filled Tires And PU Foam Tires, PU Insert
Foam filled tires: outside is rubber, inside filled with PU. The PU and rubber stick with each other. During production, we fills the PU directly into the rubber tire.
PU Insert: just as in the picture, the pu is seperated from rubber. During production, we only produce PU tire, and the PU is inserted into the rubber while install the wheel set.
PU Foam Tire: just as showed in the picture, it is made of PU foam without a rubber tire outside.
Foam Filled Tires & PU Foam Tires

PU Insert

