A: Hello, thank you for your question. Per the vendor, "The Hi-Run (18X8.50-8, 4Ply, SU05 Turf) needs a 8X7 rim, and max loading 815Lbs@22PS." Consider using the item below. SteelMaster 8x7 4 on 4 TR-416S Stamped Boxed Wheel Rim, 18.5x8.5/9.5-8 Suggested Tire Size https://www.tractorsupply.com/tsc/product/steelmaster-8x7-4-on-4-tr416s-stamped-boxed-wheel-600470? Regarding compatibility with the Kubota HST tractor, this tire is designed for lawn and garden equipment and is not compatible with Kubota HST tractors. Its 8-inch rim diameter, 8.5-inch width, and lower load capacity are not suitable for the weight and specifications of these tractors. Always use tires recommended for your specific Kubota model.

A: Hi there, this Hi-Run WD1133 is not available at TSC stores, but local Tractor Supply stores shall have 18X8.5-8 the same size for SU12 Turf Saver tread (SKU#303199, Mfg part#WD1032), and same size for golf link tread (SKU#3000148, Mfg part#WD1052). You can also place order online, and choose free pickup at local store or direct shipment to your home address.

A: The ply-rating is different. WD1032 is 2-ply rated, with max loading 515Lbs@10psi, while WD1133 is 4-ply rated, with max loading 815Lbs@22psi. Other than that, they have same size specs of overall diameter, tire width, and tread depth.

A: The Hi-Run WD1133 is a Lawn & Garden tire Not for Highway Service (NHS). You are not suggested to use it on highway.

A: The Hi-Run (18X8.50-8, 4Ply, SU05 Turf) needs a 8X7 rim, and max loading 815Lbs@22PSI. The tire is 1" wider than your tire. Please check if your mower has space for a wide tire. Also, please check the rim diameter, loading capacity and other requirements of your mower tire.

A: The WD1133 Replacement Tire, 18X8.50-8 4PR is one inch smaller on width than a tire that is 9.50 inches wide.

A: Per the vendor: WD1133 is a tubeless tire.

A: Yes.