... elastic, used in baby carriage with wide range 2.With light weight and high strength PU FORM WHEEL PU-F45801(18''x8 ... friction force, can easily fit into the working states4.Very light,the weight is only 1/4 of the rubber pad ;3 ... , can increase of force, and also to protect lawn2.With light weight and high strength, suitable for tool carts and garden tools ...