Rotary Caster Wheel Assy for Ferris 5101418 11x4.00x5 F50XT F800X IS500Z IS600Z

What It Is

This is a complete rotary caster wheel assembly (tire, rim, and hub) designed to replace the front caster on select Ferris zero-turn mowers. It’s built for rough terrain or commercial use where stock wheels wear out quickly.

Fitment & Compatibility

• Direct OEM replacement for Ferris part number 5101418.
• Fits models: F50XT, F800X, IS500Z, IS600Z (and some other Ferris zero-turns with the same caster setup).
• Size: 11x4.00-5 tire on a 5-inch rim.
• Check before buying: Measure your existing caster wheel’s bolt pattern (typically 3-bolt or 4-bolt on Ferris) and verify the spindle hole diameter. This assembly uses a common 5/8” or 3/4” bore – confirm yours matches. Also ensure the wheel offset (how far the tire sits from the mounting plate) is the same to avoid steering interference.

Key Things to Know

• Quality: Rotary is a reputable aftermarket brand; this wheel is built with a heavy-duty tire and sealed bearings for longer life than stock. One review (5 stars) suggests solid performance.
• Installation: Moderate difficulty – you’ll need a jack to lift the mower, a socket set, and possibly a pry bar to remove the old caster. Expect 20-40 minutes per wheel.
• Common gotcha: The included hardware may not match your mower’s bolts (thread pitch or length). Reuse your original bolts if possible.
• Note: This is the complete assembly – no need to buy a separate tire or rim.

Should You Buy It

If you own a compatible Ferris zero-turn and your front caster is wobbly, worn, or damaged, this is a direct, durable replacement at a fair price. It’s ideal for commercial mowing on uneven ground or for anyone wanting to avoid repeated flat tires and bearing failures. Skip it if your mower uses a different bolt pattern or wheel size.