rubber wheel for garden machine: 1.Size:3.00-4 350-4 400-4 400-8... 2.Metal rim , plastic rim 3.Ball bearing , roller bearin rubber wheel for garden machine : Size:3.00-4 350-4 400-4 400-8 650-8 850-8... Rim:Plastic rim(different colors)Metal rim ( Painted rim , zinc coatd rim ) BearingBall bearing (Carbon steel bearing , TAIWAN TIC bearing ....)Roller bearing Axle