Michelin 73818 X Tweel Turf 13x6.5N6 Grooved Front Caster – SCAG & Spartan – Single

SOLD INDIVIDUALLY: Includes ONE Michelin Tweel front caster tire/wheel unit. This is NOT a pair. Order a quantity of 2 if replacing both front units.

The Michelin 73818 X Tweel Turf front caster combines an airless tire and wheel into a single unit, replacing the conventional front tire/wheel assembly on compatible zero-turn mowers. Its airless design eliminates air-pressure maintenance and puncture-related flats.

Full-width poly-resin spokes help absorb impacts for enhanced operator comfort when navigating curbs and bumps. The circular outer beam functions like a spring, while vertical stiffness helps maintain a consistent height for a uniform cut. Grooved polyresin tread provides cut and tear resistance.

Features and Benefits

• Airless design: No inflation or air-pressure checks required.
• Integrated tire and wheel: Replaces the conventional front caster tire/wheel unit.
• Grooved polyresin tread: Durable tread designed to resist cuts and tears and provide long wear life.
• Poly-resin spokes: Carry the load and help absorb impacts for operator comfort.
• Spring-like outer beam: Creates suspension-like characteristics at the front of the mower.
• Consistent operating height: Vertical stiffness helps support a uniform cut.
• Integrated metal center hub: Equipped with OEM-quality sealed bearings.
• Application-specific installation: Match the caster and required spacer to your mower's axle diameter and fork dimensions.

Product Specifications

• Brand: Michelin
• Michelin Part Number (MSPN): 73818
• Product: X Tweel Turf Caster
• Tire Size: 13x6.5N6
• Construction: Airless front caster tire/wheel unit
• Tread: Grooved polyresin
• Position: Front
• Axle Bolt Diameter: 5/8 inch, before application-specific spacer adaptation
• Maximum Load: 290 lbs per unit
• Unit Weight: 12.5 lbs
• Quantity: One front caster tire/wheel unit; not a pair

SCAG Fitment and Spacer Requirements

• Patriot: SPZ52H — 52-inch deck; SPZ561H — 61-inch deck. Requires spacer 38182.
• Tiger Cat II: STCII-48 — 48-inch deck; STCII-52 — 52-inch deck; STCII-61 — 61-inch deck. Requires spacer 40653.
• Turf Tiger II: STTII-52V — 52-inch deck; STTII-61V — 61-inch deck; STTII-72V — 72-inch deck. Requires spacer 40653.
• V-Ride II: SVRII-61V — 61-inch deck. No additional spacer specified in the fitment guide. Confirm axle diameter and fork width before installation.
• Cheetah: all models — 61-inch and 72-inch decks. Requires spacer 38182.
• Cheetah II: SCZII-61 — 61-inch deck; SCZII-72 — 72-inch deck. Requires spacer 40653.

Spartan Fitment and Spacer Requirements

All Spartan applications listed below require spacer 38182.

• RZ: 48-inch and 54-inch decks.
• RZ C: 42-inch and 54-inch decks.
• RZ PRO: 54-inch and 61-inch decks.
• RZ HD: 48-inch, 54-inch and 61-inch decks.
• RT PRO: 54-inch and 61-inch decks.
• RT HD: 54-inch, 61-inch and 72-inch decks.
• SRT PRO: 54-inch and 61-inch decks.
• SRT HD: 54-inch and 61-inch decks.
• SRT XD: 61-inch and 72-inch decks.
• SRT XDe: 54-inch and 61-inch decks.
• Mark Mart SRT: 61-inch and 72-inch decks.
• KGZ-XD: 61-inch deck.
• KG-XD: 54-inch and 61-inch decks.
• KG-PRO: 54-inch and 61-inch decks.

Spacer and Bushing Identification

Spacers adapt the caster to specific axle diameters and inside fork widths. The following applications use a 1/2-inch axle bolt with this 13-inch caster:

• 40653 / MC-40653: Bushing pair for a 7-3/4-inch inside fork width.
• 38182 / MC-38182: Bushing pair for a 7-inch inside fork width.
• 34578 / MC-34578: Bushing pair for a 6-3/8-inch inside fork width.

Match both axle diameter and inside fork width. Fork width alone does not determine the correct spacer. Spacer 34578 is included here for identification; it is not the specified spacer for the SCAG and Spartan applications listed above.

Spacer numbers identify installation components, not additional caster tires. Confirm that the required spacer is included in your order; do not assume it is supplied with the caster.

Important Fitment Information

This listing covers only the models and deck widths shown above. Front caster fitment is separate from rear tire fitment.

Model names are reproduced as supplied, including Patriot SPZ561H and Spartan “Mark Mart SRT.” References to “all models” apply only within the named series and listed deck widths.

Tire size alone does not establish compatibility. Confirm Michelin part number 73818, mower model, deck width, axle diameter, caster fork inside width and required spacer before ordering.

Model years are not specified in the supplied fitment information.