2-Proven Part Foam Filled Tires and Wheels for Exmark and For Toro 105-3471 4.10/3.5-4. 

PU Foam Tires are constructed of solid polyurethane foam, these tires are puncture-resistant and do not require air. They provide durability and are suitable for heavy-duty applications. 

Foam Tire, No Air Required, will not deflate!
Rim Color White
Hub Width: 4.21In
Bearing Size: 3/4In
Size: 4.10/3.5/4
Grease Zerk

Fits Exmark: Quest
Fits Toro: TimeCutter Z 14-38Z, TimeCutter Z 16-42Z, TimeCutter Z 17-42Z, TimeCutter Z 18-44Z, TimeCutter Z380, TimeCutter Z420, TimeCutter Z4200, TimeCutter Z4202, TimeCutter Z4220, TimeCutter Z480, TimeCutter Z530, TimeCutter ZD380, TimeCutter ZD420, TimeCutter ZD420T, TimeCutter ZD530, TimeCutter ZX 17-44ZX, TimeCutter ZX 18-44ZX, TimeCutter ZX 18-52ZX, TimeCutter ZX 19-52ZX, TimeCutter ZX440, TimeCutter ZX480, TimeCutter ZX525