This is a A-B1CO8550 CASTER-SMOOTH, 9X3.5X4, TUBELESS, YELLOW PN: B1CO8550Main Description As Following : A-B1CO8550 CASTER-SMOOTH, 9X3.5X4, TUBELESS, YELLOW P.N: B1CO8550 Fits 38", 48", and 54" decks. 4 ply tubeless tire.Bearing Type: RollerCenter Hole: 3/4"Hub: 4", Centered Hub TypeStyle: Caster WheelTread Pattern: SmoothWheel Color: Yellow Crossed From: AM-115510 JOHN DEERE , AM101590 JOHN DEERE , AM115510 JOHN DEERE , AM116204 JOHN DEERE , 1-513648 EXMARK , 103-1224 EXMARK , 103-2171 EXMARK , 1031224 EXMARK , 1032171 EXMARK , 1513648 EXMARK , 175-606 STENS , 175606 STENS , 7-04837 PRIME LINE , 7-04863 PRIME LINE , 704837 PRIME LINE , 704863 PRIME LINE , 8550 ROTARY Found in Section & Models : Sunbelt - Tires > Wheel Assemblies (OEM), Bunton (UNDEFINED): SEVERAL, John Deere (UNDEFINED): SEVERAL Associated Items : A-B1FP102 Also This is An Aftermarket Product And : Fits 38", 48", and 54" decks. 4 ply tubeless tire. Bearing Type: Roller Center Hole: 3/4" Hub: 4", Centered Hub Type Style: Caster Wheel Tread Pattern: Smooth Wheel Color: Yellow